A reusable launch vehicle has parts that can be recovered and reflown, while carrying payloads from the surface to outer space . Rocket stages are the most common launch vehicle parts aimed for reuse. Smaller parts such as rocket engines and boosters can also be reused, though reusable spacecraft may be launched on top of an expendable launch vehicle. Reusable launch vehicles do not need to make these parts for each launch, therefore reducing its launch cost significantly. However, these benefits are diminished by the cost of recovery and refurbishment.
170-466: The Space Shuttle is a retired, partially reusable low Earth orbital spacecraft system operated from 1981 to 2011 by the U.S. National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program . Its official program name was Space Transportation System (STS), taken from the 1969 plan led by U.S. Vice President Spiro Agnew for a system of reusable spacecraft where it
340-567: A Falcon 9 rocket, and carried NASA astronauts Doug Hurley and Bob Behnken to the International Space Station in the first crewed orbital spaceflight launched from the United States since the final Space Shuttle mission in 2011, and the first ever operated by a commercial provider. Demo-2 was also the first two-person orbital spaceflight launched from the United States since STS-4 in 1982. Demo-2 completed
510-524: A "very pure flying machine", and the ride on SpaceX Merlin engines as much smoother than with Space Shuttle Solid Rocket Boosters . Hurley said that the Merlin Vacuum upper-stage engine was rougher than Space Shuttle Main Engines , "kind of like driving fast on a dirt road". They revealed the name of their Crew Dragon capsule 206, Endeavour , shortly after launch, reviving the tradition from
680-417: A 16 km (9.9 mi) enforceable keep-out zone patrolled by the U.S. Coast Guard. There will be more boats to assist in enforcing the keep-out zone. The MV GO Navigator , with the assistance of a fast boat crew, attached to the capsule using a retracting A-frame device over the back to place the capsule on the "nest". The "nest" was then pulled further on board the ship where a 30-minute purge of
850-556: A 60% probability of favorable conditions and 2 June 2020 at 18:13 UTC with a 70% probability of favorable conditions. Note: times are local to the launch site ( Eastern Daylight Time ). Three days after the first launch attempt was scrubbed, the Crew Dragon Endeavour launched atop a Falcon 9 rocket from Kennedy Space Center Launch Complex 39A at 19:22:45 UTC on 30 May 2020. The first stage booster (serial number B1058 ) landed autonomously on
1020-511: A Crew Dragon capsule successfully completed an in-flight abort test. NASA Administrator Jim Bridenstine said on 9 April 2020 that he was "fairly confident" that astronauts could fly to the ISS aboard SpaceX's Crew Dragon spaceship at the end of May or in early June 2020, pending final parachute tests, data reviews and a training schedule that could escape major impacts from the ongoing COVID-19 pandemic . On 17 April 2020, NASA and SpaceX announced
1190-490: A NASA engineer who had worked to design the Mercury capsule, patented a design for a two-stage fully recoverable system with a straight-winged orbiter mounted on a larger straight-winged booster. The Air Force Flight Dynamics Laboratory argued that a straight-wing design would not be able to withstand the high thermal and aerodynamic stresses during reentry, and would not provide the required cross-range capability. Additionally,
1360-482: A crew in another fast boat collected the four parachutes which had disconnected from the capsule. While crews worked, many private boats entered the hazardous area defined by the Coast Guard despite earlier warnings. Some moving close to the capsule even passing between the capsule placing themselves and recovery crews themselves in danger. After radioed warnings, the boats dispersed to form a more distant ring around
1530-495: A crewed spaceflight engineer on both STS-51-C and STS-51-J to serve as a military representative for a National Reconnaissance Office payload. A Space Shuttle crew typically had seven astronauts, with STS-61-A flying with eight. The crew compartment comprised three decks and was the pressurized, habitable area on all Space Shuttle missions. The flight deck consisted of two seats for the commander and pilot, as well as an additional two to four seats for crew members. The mid-deck
1700-513: A flight test program with experimental vehicles . These subsequently led to the development of the Falcon 9 reusable rocket launcher. Crew Dragon Demo-2 Crew Dragon Demo-2 (officially Crew Demo-2 , SpaceX Demo-2 , or Demonstration Mission-2 ) was the first crewed test flight of the Crew Dragon spacecraft. The spacecraft, named Endeavour , launched on 30 May 2020 on
1870-518: A fully reusable successor to the Saturn V rocket, having the capacity of transporting up to 450–910 t (990,000–2,000,000 lb) to orbit. See also Sea Dragon , and Douglas SASSTO . The BAC Mustard was studied starting in 1964. It would have comprised three identical spaceplanes strapped together and arranged in two stages. During ascent the two outer spaceplanes, which formed the first stage, would detach and glide back individually to earth. It
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#17327653356392040-467: A future reusable shuttle: Class I would have a reusable orbiter mounted on expendable boosters, Class II would use multiple expendable rocket engines and a single propellant tank (stage-and-a-half), and Class III would have both a reusable orbiter and a reusable booster. In September 1969, the Space Task Group, under the leadership of U.S. Vice President Spiro Agnew , issued a report calling for
2210-596: A glider. Its three-part fuselage provided support for the crew compartment, cargo bay, flight surfaces, and engines. The rear of the orbiter contained the Space Shuttle Main Engines (SSME), which provided thrust during launch, as well as the Orbital Maneuvering System (OMS), which allowed the orbiter to achieve, alter, and exit its orbit once in space. Its double- delta wings were 18 m (60 ft) long, and were swept 81° at
2380-451: A hard capture 11 minutes later. Hurley and Behnken worked alongside the crew of Expedition 63 for 62 days, including four spacewalks by Behnken with fellow American astronaut Chris Cassidy to replace batteries brought up by a Japanese cargo vehicle . Endeavour autonomously undocked from the station on 1 August 2020 and thirteen hours later returned the astronauts to Earth in the first water landing by astronauts since 1975. After
2550-484: A pair of recoverable solid rocket boosters (SRBs), and the expendable external tank (ET) containing liquid hydrogen and liquid oxygen . The Space Shuttle was launched vertically , like a conventional rocket, with the two SRBs operating in parallel with the orbiter's three main engines , which were fueled from the ET. The SRBs were jettisoned before the vehicle reached orbit, while the main engines continued to operate, and
2720-755: A part of its launch system. More contemporarily the Falcon 9 launch system has carried reusable vehicles such as the Dragon 2 and X-37 , transporting two reusable vehicles at the same time. Contemporary reusable orbital vehicles include the X-37, the Dream Chaser , the Dragon 2, the Indian RLV-TD and the upcoming European Space Rider (successor to the IXV ). As with launch vehicles, all pure spacecraft during
2890-532: A partial-pressure version of the high-altitude pressure suits with a helmet. In 1994, the LES was replaced by the full-pressure Advanced Crew Escape Suit (ACES), which improved the safety of the astronauts in an emergency situation. Columbia originally had modified SR-71 zero-zero ejection seats installed for the ALT and first four missions, but these were disabled after STS-4 and removed after STS-9 . The flight deck
3060-527: A partially reusable system would be the most cost-effective solution. The head of the NASA Office of Manned Space Flight, George Mueller , announced the plan for a reusable shuttle on August 10, 1968. NASA issued a request for proposal (RFP) for designs of the Integral Launch and Reentry Vehicle (ILRV) on October 30, 1968. Rather than award a contract based upon initial proposals, NASA announced
3230-555: A phased approach for the Space Shuttle contracting and development; Phase A was a request for studies completed by competing aerospace companies, Phase B was a competition between two contractors for a specific contract, Phase C involved designing the details of the spacecraft components, and Phase D was the production of the spacecraft. In December 1968, NASA created the Space Shuttle Task Group to determine
3400-479: A port-side hatch that the crew used for entry and exit while on Earth. The airlock is a structure installed to allow movement between two spaces with different gas components, conditions, or pressures. Continuing on the mid-deck structure, each orbiter was originally installed with an internal airlock in the mid-deck. The internal airlock was installed as an external airlock in the payload bay on Discovery , Atlantis , and Endeavour to improve docking with Mir and
3570-672: A result of an O-ring failing at low temperature, the SRBs were redesigned to provide a constant seal regardless of the ambient temperature. The Space Shuttle's operations were supported by vehicles and infrastructure that facilitated its transportation, construction, and crew access. The crawler-transporters carried the MLP and the Space Shuttle from the VAB to the launch site. The Shuttle Carrier Aircraft (SCA) were two modified Boeing 747s that could carry an orbiter on its back. The original SCA (N905NA)
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#17327653356393740-422: A rocket which is planned to be reusable. As of October 2024 , Starship is the only launch vehicle intended to be fully reusable that has been fully built and tested. The most recent test flight was on October 13, 2024, in which the vehicle completed a suborbital launch and landed both stages for the second time. The Super Heavy booster was caught successfully by the "chopstick system" on Orbital Pad A for
3910-669: A second orbiter. Later that month, Rockwell began converting STA-099 to OV-099, later named Challenger . On January 29, 1979, NASA ordered two additional orbiters, OV-103 and OV-104, which were named Discovery and Atlantis . Construction of OV-105, later named Endeavour , began in February 1982, but NASA decided to limit the Space Shuttle fleet to four orbiters in 1983. After the loss of Challenger , NASA resumed production of Endeavour in September 1987. After it arrived at Edwards AFB, Enterprise underwent flight testing with
4080-670: A separate central processing unit (CPU) and input/output processor (IOP), and non-volatile solid-state memory . From 1991 to 1993, the orbiter vehicles were upgraded to the AP-101S, which improved the memory and processing capabilities, and reduced the volume and weight of the computers by combining the CPU and IOP into a single unit. Four of the GPCs were loaded with the Primary Avionics Software System (PASS), which
4250-405: A speech. After STS-4, NASA declared its Space Transportation System (STS) operational. The Space Shuttle was the first operational orbital spacecraft designed for reuse . Each Space Shuttle orbiter was designed for a projected lifespan of 100 launches or ten years of operational life, although this was later extended. At launch, it consisted of the orbiter , which contained the crew and payload,
4420-466: A total of 14 astronauts killed. A fifth operational (and sixth in total) orbiter, Endeavour , was built in 1991 to replace Challenger . The three surviving operational vehicles were retired from service following Atlantis ' s final flight on July 21, 2011. The U.S. relied on the Russian Soyuz spacecraft to transport astronauts to the ISS from the last Shuttle flight until the launch of
4590-426: A two-part drag parachute system to slow the orbiter after landing. The orbiter used retractable landing gear with a nose landing gear and two main landing gear, each containing two tires. The main landing gear contained two brake assemblies each, and the nose landing gear contained an electro-hydraulic steering mechanism. The Space Shuttle crew varied per mission. They underwent rigorous testing and training to meet
4760-446: Is a staged-combustion cycle cryogenic engine that used liquid oxygen and hydrogen and had a higher chamber pressure than any previous liquid-fueled rocket. The original main combustion chamber operated at a maximum pressure of 226.5 bar (3,285 psi). The engine nozzle is 287 cm (113 in) tall and has an interior diameter of 229 cm (90.3 in). The nozzle is cooled by 1,080 interior lines carrying liquid hydrogen and
4930-423: Is an in-air-capture tow back system, advocated by a company called EMBENTION with its FALCon project. Vehicles that land horizontally on a runway require wings and undercarriage. These typically consume about 9-12% of the landing vehicle mass, which either reduces the payload or increases the size of the vehicle. Concepts such as lifting bodies offer some reduction in wing mass, as does the delta wing shape of
5100-484: Is assumed that the bulk density of the first stage (without propellant) is less than the bulk density of air. Upon returning from flight, such a first stage remains floating in the air (without touching the surface of the Earth). This will ensure that the first stage is retained for reuse. Increasing the size of the first stage increases aerodynamic losses. This results in a slight decrease in payload. This reduction in payload
5270-607: Is compensated for by the reuse of the first stage. Reusable stages weigh more than equivalent expendable stages . This is unavoidable due to the supplementary systems, landing gear and/or surplus propellant needed to land a stage. The actual mass penalty depends on the vehicle and the return mode chosen. After the launcher lands, it may need to be refurbished to prepare it for its next flight. This process may be lengthy and expensive. The launcher may not be able to be recertified as human-rated after refurbishment, although SpaceX has flown reused Falcon 9 boosters for human missions. There
Space Shuttle - Misplaced Pages Continue
5440-430: Is eventually a limit on how many times a launcher can be refurbished before it has to be retired, but how often a launcher can be reused differs significantly between the various launch system designs. With the development of rocket propulsion in the first half of the twentieth century, space travel became a technical possibility. Early ideas of a single-stage reusable spaceplane proved unrealistic and although even
5610-436: Is thermally protected by insulative and ablative material. The RS-25 engines had several improvements to enhance reliability and power. During the development program, Rocketdyne determined that the engine was capable of safe reliable operation at 104% of the originally specified thrust. To keep the engine thrust values consistent with previous documentation and software, NASA kept the originally specified thrust at 100%, but had
5780-835: Is thought of as the first stage of the launch vehicle. An example of this configuration is the Orbital Sciences Pegasus . For suborbital flight the SpaceShipTwo uses for liftoff a carrier plane, its mothership the Scaled Composites White Knight Two . Rocket Lab is working on Neutron , and the European Space Agency is working on Themis . Both vehicles are planned to recover the first stage. So far, most launch systems achieve orbital insertion with at least partially expended multistaged rockets , particularly with
5950-533: Is to be caught by arms after performing most of the typical steps of a retrograde landing. Blue Origin 's New Shepard suborbital rocket also lands vertically back at the launch site. Retrograde landing typically requires about 10% of the total first stage propellant, reducing the payload that can be carried due to the rocket equation . There is also the concept of a launch vehicle with an inflatable, reusable first stage. The shape of this structure will be supported by excess internal pressure (using light gases). It
6120-455: Is working on a two-stage-to-orbit system. SpaceX is testing Starship , which has been in development since 2016 and has made an initial test flight in April 2023 and 5 more flights as of November 2024. Blue Origin , with Project Jarvis , began development work by early 2021, but has announced no date for testing and have not discussed the project publicly. Stoke Space is also developing
6290-511: The Columbia disaster . Beginning with STS-114 , the orbiter vehicles were equipped with the wing leading edge impact detection system to alert the crew to any potential damage. The entire underside of the orbiter vehicle, as well as the other hottest surfaces, were protected with tiles of high-temperature reusable surface insulation, made of borosilicate glass -coated silica fibers that trapped heat in air pockets and redirected it out. Areas on
6460-529: The 45th Weather Squadron of the U.S. Space Force , for the original launch time at 20:33:33 UTC on 27 May 2020, predicted a 50% probability of favorable conditions. The launch was scrubbed at T−16:53 minutes due to thunderstorms and light rain in the area caused by Tropical Storm Bertha . The second launch attempt also faced a 50% probability of favorable conditions, but was successful and took place on 30 May 2020 at 19:22:45 UTC. The other launch windows were 31 May 2020 at 19:00:07 UTC, with
6630-487: The Commercial Crew Program , which is expected to cost 50% less than Soyuz once in regular operation. Up to the launch, NASA has awarded a total of US$ 3.1 billion for the development of the Dragon 2 . The Demo-2 mission was SpaceX's last major test before NASA certified it for regular crewed spaceflights . Prior to that, SpaceX had sent twenty cargo missions to the ISS, but never a crewed one. Boeing
6800-778: The Crew Dragon Demo-2 mission in May 2020. In the late 1930s, the German government launched the " Amerikabomber " project, and Eugen Sanger 's idea, together with mathematician Irene Bredt , was a winged rocket called the Silbervogel (German for "silver bird"). During the 1950s, the United States Air Force proposed using a reusable piloted glider to perform military operations such as reconnaissance, satellite attack, and air-to-ground weapons employment. In
6970-550: The Falcon 9 and the New Shepard employ retrograde burns for re-entry, and landing. Reusable systems can come in single or multiple ( two or three ) stages to orbit configurations. For some or all stages the following landing system types can be employed. These are landing systems that employ parachutes and bolstered hard landings, like in a splashdown at sea or a touchdown at land. The latter may require an engine burn just before landing as parachutes alone cannot slow
Space Shuttle - Misplaced Pages Continue
7140-604: The Hubble Space Telescope (HST), conducted science experiments in orbit, participated in the Shuttle- Mir program with Russia, and participated in the construction and servicing of the International Space Station (ISS). The Space Shuttle fleet's total mission time was 1,323 days. Space Shuttle components include the Orbiter Vehicle (OV) with three clustered Rocketdyne RS-25 main engines,
7310-565: The ISS , along with the Orbiter Docking System . The airlock module can be fitted in the mid-bay, or connected to it but in the payload bay. With an internal cylindrical volume of 1.60 metres (5 feet 3 inches) diameter and 2.11 metres (6 feet 11 inches) in length, it can hold two suited astronauts. It has two D-shaped hatchways 1.02 m (40 in) long (diameter), and 0.91 m (36 in) wide. The orbiter
7480-606: The Martin Marietta X-24B . The program tested aerodynamic characteristics that would later be incorporated in design of the Space Shuttle, including unpowered landing from a high altitude and speed. On September 24, 1966, as the Apollo space program neared its design completion, NASA and the Air Force released a joint study concluding that a new vehicle was required to satisfy their respective future demands and that
7650-519: The Mercury , Gemini , and Apollo programs where astronauts would name their spacecraft. It was the third U.S. spacecraft named Endeavour , after Space Shuttle Endeavour , built in 1991 to replace Space Shuttle Challenger , which was destroyed in 1986 , and the Apollo command and service module used for the Apollo 15 mission in 1971. Hurley said that they chose Endeavour as both his and Behnken's first flights to space were on
7820-682: The Shuttle Carrier Aircraft , a Boeing 747 that had been modified to carry the orbiter. In February 1977, Enterprise began the Approach and Landing Tests (ALT) and underwent captive flights, where it remained attached to the Shuttle Carrier Aircraft for the duration of the flight. On August 12, 1977, Enterprise conducted its first glide test, where it detached from the Shuttle Carrier Aircraft and landed at Edwards AFB. After four additional flights, Enterprise
7990-853: The Shuttle Landing Facility at KSC, Florida, or to Rogers Dry Lake in Edwards Air Force Base , California. If the landing occurred at Edwards, the orbiter was flown back to the KSC atop the Shuttle Carrier Aircraft (SCA), a specially modified Boeing 747 designed to carry the shuttle above it. The first orbiter, Enterprise , was built in 1976 and used in Approach and Landing Tests (ALT), but had no orbital capability. Four fully operational orbiters were initially built: Columbia , Challenger , Discovery , and Atlantis . Of these, two were lost in mission accidents: Challenger in 1986 and Columbia in 2003 , with
8160-699: The Space Launch System are considered to be retrofitted with such heat shields to salvage the expensive engines, possibly reducing the costs of launches significantly. Heat shields allow an orbiting spacecraft to land safely without expending very much fuel. They need not take the form of inflatable heat shields, they may simply take the form of heat-resistant tiles that prevent heat conduction . Heat shields are also proposed for use in combination with retrograde thrust to allow for full reusability as seen in Starship . Reusable launch system stages such as
8330-475: The Space Shuttle . Systems like the McDonnell Douglas DC-X (Delta Clipper) and those by SpaceX are examples of a retrograde system. The boosters of Falcon 9 and Falcon Heavy land using one of their nine engines. The Falcon 9 rocket is the first orbital rocket to vertically land its first stage on the ground. The first stage of Starship is planned to land vertically, while the second
8500-561: The Space Shuttle orbiter that acted as an orbital insertion stage, but it did not reuse the External Tank that fed the RS-25 engines. This is an example of a reusable launch system which reuses specific components of rockets. ULA’s Vulcan Centaur was originally designed to reuse the first stage engines, while the tank is expended. The engines would splashdown on an inflatable aeroshell , then be recovered. On 23 February 2024, one of
8670-400: The Space Shuttle program was brought to an end in 2011, NASA no longer had a spacecraft system capable of sending humans to space . As a result, it was forced to fly its astronauts to the International Space Station (ISS) aboard the Russian Soyuz space vehicle , at a cost of up to US$ 80 million per astronaut. As an alternative, NASA contracted with private companies such as SpaceX for
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#17327653356398840-631: The Tracking and Data Relay Satellite System and the Spacecraft Tracking and Data Acquisition Network ground stations to communicate with the orbiter throughout its orbit. Additionally, the orbiter deployed a high-bandwidth K u band radio out of the cargo bay, which could also be utilized as a rendezvous radar. The orbiter was also equipped with two UHF radios for communications with air traffic control and astronauts conducting EVA. The Space Shuttle's fly-by-wire control system
9010-538: The external tank (ET), and the two solid rocket boosters (SRBs). Responsibility for the Space Shuttle components was spread among multiple NASA field centers. The KSC was responsible for launch, landing, and turnaround operations for equatorial orbits (the only orbit profile actually used in the program). The U.S. Air Force at the Vandenberg Air Force Base was responsible for launch, landing, and turnaround operations for polar orbits (though this
9180-483: The qualification requirements for their roles. The crew was divided into three categories: Pilots, Mission Specialists, and Payload Specialists. Pilots were further divided into two roles: Space Shuttle Commanders and Space Shuttle Pilots. The test flights only had two members each, the commander and pilot, who were both qualified pilots that could fly and land the orbiter. The on-orbit operations, such as experiments, payload deployment, and EVAs, were conducted primarily by
9350-550: The 2000s and 2010s lead to a resurgence of their development, such as in SpaceShipOne , New Shepard , Electron , Falcon 9 , and Falcon Heavy . Many launch vehicles are now expected to debut with reusability in the 2020s, such as Starship , New Glenn , Neutron , Soyuz-7 , Ariane Next , Long March , Terran R , and the Dawn Mk-II Aurora. The impact of reusability in launch vehicles has been foundational in
9520-505: The 2195 aluminum-lithium alloy, which was 40% stronger and 10% less dense than its predecessor, 2219 aluminum-lithium alloy. The SLWT weighed 3,400 kg (7,500 lb) less than the LWT, which allowed the Space Shuttle to deliver heavy elements to ISS's high inclination orbit. The Solid Rocket Boosters (SRB) provided 71.4% of the Space Shuttle's thrust during liftoff and ascent, and were the largest solid-propellant motors ever flown. Each SRB
9690-450: The Air Force required a larger payload capacity than Faget's design allowed. In January 1971, NASA and Air Force leadership decided that a reusable delta-wing orbiter mounted on an expendable propellant tank would be the optimal design for the Space Shuttle. After they established the need for a reusable, heavy-lift spacecraft, NASA and the Air Force determined the design requirements of their respective services. The Air Force expected to use
9860-404: The ET was jettisoned after main engine cutoff and just before orbit insertion , which used the orbiter's two Orbital Maneuvering System (OMS) engines. At the conclusion of the mission, the orbiter fired its OMS to deorbit and reenter the atmosphere . The orbiter was protected during reentry by its thermal protection system tiles, and it glided as a spaceplane to a runway landing, usually to
10030-456: The Earth. Behnken also completed 4 spacewalks with Chris Cassidy. NASA mission managers had evaluated additional sites off Panama City, Florida , Tallahassee , Tampa , and Daytona Beach to provide more options in the event of stormy tropical weather. The United States Coast Guard advised against entering a 10 nmi (19 km; 12 mi) square defined in its Notices to Mariners for
10200-678: The IMU, INS, and TACAN systems, which first flew on STS-118 in August 2007. While in orbit, the crew primarily communicated using one of four S band radios, which provided both voice and data communications. Two of the S ;band radios were phase modulation transceivers , and could transmit and receive information. The other two S band radios were frequency modulation transmitters and were used to transmit data to NASA. As S band radios can operate only within their line of sight , NASA used
10370-470: The IMUs while in orbit. The star trackers are deployed while in orbit, and can automatically or manually align on a star. In 1991, NASA began upgrading the inertial measurement units with an inertial navigation system (INS), which provided more accurate location information. In 1993, NASA flew a GPS receiver for the first time aboard STS-51 . In 1997, Honeywell began developing an integrated GPS/INS to replace
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#173276533563910540-442: The ISS, followed by a phasing burn lasting over six minutes to place the capsule on a trajectory to return to Earth. The crew was awakened on the final day of the flight with prerecorded voice messages from their sons. A yaw maneuver occurred at 17:51 to separate the "claw" umbilical mechanism from the trunk. The deorbit burn of 11 minutes and 22 seconds occurred shortly after 17:56 UTC. Just before reentry at 18:11 UTC,
10710-475: The ISS. Behnken and Hurley arrived at Kennedy Space Center on 20 May 2020 in preparation for the launch. On 21 May 2020, the Falcon 9 rocket was rolled out to the launch pad, and a static fire test was conducted on 22 May 2020, a major milestone ahead of the launch. The mission used a Tesla Model X to transport Hurley and Behnken to LC-39A . An official launch weather forecast for Dragon Crew Demo-2 by
10880-503: The ISS. Hurley demonstrated the ability to pilot the spacecraft via its touchscreen controls until it reached a distance of 220 metres (720 ft), after which Endeavour autonomously soft-docked to the pressurized mating adapter PMA-2 on the Harmony module of the ISS at 14:16 UTC on 31 May 2020. Following soft capture, 12 hooks were closed to complete a hard capture at 14:27 UTC. Approximately two hours after docking,
11050-463: The ISS. The words NASA, SPACEX, FIRST CREWED FLIGHT and DM-2 are printed around the border along with the surnames of the astronauts. The insignia outline is in the shape of the Crew Dragon capsule. The Falcon 9 rocket used to launch Endeavour displayed NASA's "worm" insignia , the first time the logo had been used officially since it was retired in 1992. NASA TV and media coverage of
11220-482: The KSC. The Space Shuttle was prepared for launch primarily in the VAB at the KSC. The SRBs were assembled and attached to the external tank on the MLP. The orbiter vehicle was prepared at the Orbiter Processing Facility (OPF) and transferred to the VAB, where a crane was used to rotate it to the vertical orientation and mate it to the external tank. Once the entire stack was assembled, the MLP
11390-579: The Kennedy Space Center to view the launch and asked people to instead watch the launch on television or online. Bridenstine explained that maintenance crews were working in cohesive shifts, to mitigate workers' exposure to SARS-CoV-2 . On 1 May 2020, SpaceX successfully demonstrated the Mark 3 parachute system, a critical milestone for the mission approval. Crew Dragon Demo-2 marked the first crewed United States spaceflight mission not to include
11560-474: The RS-25 experienced multiple nozzle failures, as well as broken turbine blades. Despite the problems during testing, NASA ordered the nine RS-25 engines needed for its three orbiters under construction in May 1978. NASA experienced significant delays in the development of the Space Shuttle's thermal protection system . Previous NASA spacecraft had used ablative heat shields, but those could not be reused. NASA chose to use ceramic tiles for thermal protection, as
11730-498: The RS-25 operate at higher thrust. RS-25 upgrade versions were denoted as Block I and Block II. 109% thrust level was achieved with the Block II engines in 2001, which reduced the chamber pressure to 207.5 bars (3,010 psi), as it had a larger throat area. The normal maximum throttle was 104 percent, with 106% or 109% used for mission aborts. The Orbital Maneuvering System (OMS) consisted of two aft-mounted AJ10-190 engines and
11900-499: The SRBs provided structural support for the orbiter vehicle and ET, as they were the only system that was connected to the mobile launcher platform (MLP). At the time of launch, the SRBs were armed at T−5 minutes, and could only be electrically ignited once the RS-25 engines had ignited and were without issue. They each provided 12,500 kN (2,800,000 lbf) of thrust, which was later improved to 13,300 kN (3,000,000 lbf) beginning on STS-8 . After expending their fuel,
12070-554: The SRBs were jettisoned approximately two minutes after launch at an altitude of approximately 46 km (150,000 ft). Following separation, they deployed drogue and main parachutes, landed in the ocean, and were recovered by the crews aboard the ships MV Freedom Star and MV Liberty Star . Once they were returned to Cape Canaveral, they were cleaned and disassembled. The rocket motor, igniter, and nozzle were then shipped to Thiokol to be refurbished and reused on subsequent flights. The SRBs underwent several redesigns throughout
12240-550: The Shuttle Endeavour . Each crew member brought along a toy from their family; an Apatosaurus dinosaur named "Tremor" and a Ty plush toy. As in past space missions, the plush toy was used as an indication of zero gravity for the strapped-in astronauts. Behnken and Hurley said, "That was a super cool thing for us to get a chance to do for both of our sons, who I hope are super excited to see their toys floating around with us on board". The crew were awakened on
12410-611: The Shuttle technology, to be demonstrated under the X-33 and X-34 programs, which were both cancelled in the early 2000s due to rising costs and technical issues. The Ansari X Prize contest was intended to develop private suborbital reusable vehicles. Many private companies competed, with the winner, Scaled Composites , reaching the Kármán line twice in a two-week period with their reusable SpaceShipOne . In 2012, SpaceX started
12580-399: The Space Shuttle through ascent, orbit, and reentry, but could not support an entire mission. The five GPCs were separated in three separate bays within the mid-deck to provide redundancy in the event of a cooling fan failure. After achieving orbit, the crew would switch some of the GPCs functions from guidance, navigation, and control (GNC) to systems management (SM) and payload (PL) to support
12750-526: The Space Shuttle to launch large satellites, and required it to be capable of lifting 29,000 kg (65,000 lb) to an eastward LEO or 18,000 kg (40,000 lb) into a polar orbit . The satellite designs also required that the Space Shuttle have a 4.6 by 18 m (15 by 60 ft) payload bay. NASA evaluated the F-1 and J-2 engines from the Saturn rockets , and determined that they were insufficient for
12920-585: The aft seating location, and also controlled the data on the HUD. In 1998, Atlantis was upgraded with the Multifunction Electronic Display System (MEDS), which was a glass cockpit upgrade to the flight instruments that replaced the eight MCDS display units with 11 multifunction colored digital screens. MEDS was flown for the first time in May 2000 on STS-101 , and the other orbiter vehicles were upgraded to it. The aft section of
13090-404: The aircraft. Other than that a range of non-rocket liftoff systems have been proposed and explored over time as reusable systems for liftoff, from balloons to space elevators . Existing examples are systems which employ winged horizontal jet-engine powered liftoff. Such aircraft can air launch expendable rockets and can because of that be considered partially reusable systems if the aircraft
13260-401: The associated propellant tanks. The AJ10 engines used monomethylhydrazine (MMH) oxidized by dinitrogen tetroxide (N 2 O 4 ). The pods carried a maximum of 2,140 kg (4,718 lb) of MMH and 3,526 kg (7,773 lb) of N 2 O 4 . The OMS engines were used after main engine cut-off (MECO) for orbital insertion. Throughout the flight, they were used for orbit changes, as well as
13430-559: The atmosphere and navigate through it, so they are often equipped with heat shields , grid fins , and other flight control surfaces . By modifying their shape, spaceplanes can leverage aviation mechanics to aid in its recovery, such as gliding or lift . In the atmosphere, parachutes or retrorockets may also be needed to slow it down further. Reusable parts may also need specialized recovery facilities such as runways or autonomous spaceport drone ships . Some concepts rely on ground infrastructures such as mass drivers to accelerate
13600-439: The bay, and provided a relatively airtight seal to protect payloads from heating during launch and reentry. Payloads were secured in the payload bay to the attachment points on the longerons . The payload bay doors served an additional function as radiators for the orbiter vehicle's heat, and were opened upon reaching orbit for heat rejection. The orbiter could be used in conjunction with a variety of add-on components depending on
13770-561: The built-in hold at T−9 minutes, the countdown was automatically controlled by the Ground Launch Sequencer (GLS) at the LCC, which stopped the countdown if it sensed a critical problem with any of the Space Shuttle's onboard systems. At T−3 minutes 45 seconds, the engines began conducting gimbal tests, which were concluded at T−2 minutes 15 seconds. The ground Launch Processing System handed off
13940-459: The bulk of the ET, and was 29 m (96.7 ft) tall. The orbiter vehicle was attached to the ET at two umbilical plates, which contained five propellant and two electrical umbilicals, and forward and aft structural attachments. The exterior of the ET was covered in orange spray-on foam to allow it to survive the heat of ascent. The ET provided propellant to the Space Shuttle Main Engines from liftoff until main engine cutoff. The ET separated from
14110-503: The capsule bolts to the trunk of the vehicle using tension ties. SpaceX stated that the erosion was likely caused by airflow phenomena that were not expected to occur around the ties. The heat shield design was changed to include more erosion-resistant materials at the ties. One of four ties was noted to have deep erosion. Though it could not be determined why this was not seen during SpaceX Demo-1, Hans Koenigsmann speculated that it may be related to different masses and trajectories flown by
14280-446: The capsule. The United States Coast Guard said in a statement later that evening that previous warnings were advisory in nature; the three patrol boats in the area were stationed within their jurisdiction and did not provide sufficient resources to board vessels interfering with the recovery. The statement added that they would be reviewing events with NASA and SpaceX . Later SpaceX and NASA confirmed that their next mission will have
14450-517: The coast of Pensacola, Florida , marking the first splashdown in 45 years for NASA astronauts since the Apollo–Soyuz Test Project , as well as the first splashdown of a crewed spacecraft in the Gulf of Mexico . After splashdown, a crew in one fast boat approached the capsule, checking the air quality for any traces of highly toxic hypergolic propellant which could indicate a leak, while
14620-548: The contract to build the orbiter to North American Rockwell. In August 1973, the external tank contract to Martin Marietta , and in November the solid-rocket booster contract to Morton Thiokol . On June 4, 1974, Rockwell began construction on the first orbiter, OV-101, dubbed Constitution, later to be renamed Enterprise . Enterprise was designed as a test vehicle, and did not include engines or heat shielding. Construction
14790-475: The control to the orbiter vehicle's GPCs at T−31 seconds. At T−16 seconds, the GPCs armed the SRBs, the sound suppression system (SPS) began to drench the MLP and SRB trenches with 1,100,000 L (300,000 U.S. gal) of water to protect the orbiter vehicle from damage by acoustical energy and rocket exhaust reflected from the flame trench and MLP during lift-off. At T−10 seconds, hydrogen igniters were activated under each engine bell to quell
14960-531: The craft down enough to prevent injury to astronauts. This can be seen in the Soyuz capsule. Though such systems have been in use since the beginning of astronautics to recover space vehicles, only later have the vehicles been reused. E.g.: Single or main stages, as well as fly-back boosters can employ a horizontal landing system. These vehicles land on earth much like a plane does, but they usually do not use propellant during landing. Examples are: A variant
15130-419: The deorbit burn prior to reentry. Each OMS engine produced 27,080 N (6,087 lbf) of thrust, and the entire system could provide 305 m/s (1,000 ft/s) of velocity change . The orbiter was protected from heat during reentry by the thermal protection system (TPS), a thermal soaking protective layer around the orbiter. In contrast with previous US spacecraft, which had used ablative heat shields,
15300-513: The development of a space shuttle to bring people and cargo to low Earth orbit (LEO), as well as a space tug for transfers between orbits and the Moon, and a reusable nuclear upper stage for deep space travel. After the release of the Space Shuttle Task Group report, many aerospace engineers favored the Class III, fully reusable design because of perceived savings in hardware costs. Max Faget ,
15470-430: The early decades of human capacity to achieve spaceflight were designed to be single-use items. This was true both for satellites and space probes intended to be left in space for a long time, as well as any object designed to return to Earth such as human-carrying space capsules or the sample return canisters of space matter collection missions like Stardust (1999–2006) or Hayabusa (2005–2010). Exceptions to
15640-618: The ease of refurbishing them for reuse after they landed in the ocean. In January 1972, President Richard Nixon approved the Shuttle, and NASA decided on its final design in March. The development of the Space Shuttle Main Engine (SSME) remained the responsibility of Rocketdyne, and the contract was issued in July 1971, and updated SSME specifications were submitted to Rocketdyne in that April. That August, NASA awarded
15810-490: The effects of aerodynamic and thermal stresses during launch and reentry. The beginning of the development of the RS-25 Space Shuttle Main Engine was delayed for nine months while Pratt & Whitney challenged the contract that had been issued to Rocketdyne. The first engine was completed in March 1975, after issues with developing the first throttleable, reusable engine. During engine testing,
15980-510: The engines during powered flight and fly the orbiter during unpowered flight. Both seats also had rudder controls, to allow rudder movement in flight and nose-wheel steering on the ground. The orbiter vehicles were originally installed with the Multifunction CRT Display System (MCDS) to display and control flight information. The MCDS displayed the flight information at the commander and pilot seats, as well as at
16150-492: The far more promising Skylon design, which remains in development. From the late 1990s to the 2000s, the European Space Agency studied the recovery of the Ariane 5 solid rocket boosters. The last recovery attempt took place in 2009. The commercial ventures, Rocketplane Kistler and Rotary Rocket , attempted to build reusable privately developed rockets before going bankrupt. NASA proposed reusable concepts to replace
16320-603: The feasibility of reusable boosters. This became the basis for the aerospaceplane , a fully reusable spacecraft that was never developed beyond the initial design phase in 1962–1963. Beginning in the early 1950s, NASA and the Air Force collaborated on developing lifting bodies to test aircraft that primarily generated lift from their fuselages instead of wings, and tested the NASA M2-F1 , Northrop M2-F2 , Northrop M2-F3 , Northrop HL-10 , Martin Marietta X-24A , and
16490-668: The final decision to scrub a launch was announced. In addition to the weather at the launch site, conditions had to be acceptable at one of the Transatlantic Abort Landing sites and the SRB recovery area. The mission crew and the Launch Control Center (LCC) personnel completed systems checks throughout the countdown. Two built-in holds at T−20 minutes and T−9 minutes provided scheduled breaks to address any issues and additional preparation. After
16660-532: The first four Shuttle missions, astronauts wore modified U.S. Air Force high-altitude full-pressure suits, which included a full-pressure helmet during ascent and descent. From the fifth flight, STS-5 , until the loss of Challenger , the crew wore one-piece light blue nomex flight suits and partial-pressure helmets. After the Challenger disaster, the crew members wore the Launch Entry Suit (LES),
16830-466: The first full mission was on STS-9. Three RS-25 engines, also known as the Space Shuttle Main Engines (SSME), were mounted on the orbiter's aft fuselage in a triangular pattern. The engine nozzles could gimbal ±10.5° in pitch, and ±8.5° in yaw during ascent to change the direction of their thrust to steer the Shuttle. The titanium alloy reusable engines were independent of the orbiter vehicle and would be removed and replaced in between flights. The RS-25
17000-431: The first practical rocket vehicles ( V-2 ) could reach the fringes of space, reusable technology was too heavy. In addition, many early rockets were developed to deliver weapons, making reuse impossible by design. The problem of mass efficiency was overcome by using multiple expendable stages in a vertical launch multistage rocket . USAF and NACA had been studying orbital reusable spaceplanes since 1958, e.g. Dyna-Soar , but
17170-476: The first reusable stages did not fly until the advent of the US Space Shuttle in 1981. Perhaps the first reusable launch vehicles were the ones conceptualized and studied by Wernher von Braun from 1948 until 1956. The Von Braun Ferry Rocket underwent two revisions: once in 1952 and again in 1956. They would have landed using parachutes. The General Dynamics Nexus was proposed in the 1960s as
17340-477: The first time NASA performed a crewed first-flight of a spacecraft. On April 12, 1981, the Space Shuttle launched for the first time, and was piloted by John Young and Robert Crippen . During the two-day mission, Young and Crippen tested equipment on board the shuttle, and found several of the ceramic tiles had fallen off the top side of the Columbia . NASA coordinated with the Air Force to use satellites to image
17510-528: The first time. The Ship completed its second successful reentry and returned for a controlled splashdown in the Indian Ocean. The test marked the second instance that could be considered meeting all requirements to be fully reusable. Partial reusable launch systems, in the form of multiple stage to orbit systems have been so far the only reusable configurations in use. The historic Space Shuttle reused its Solid Rocket Boosters , its RS-25 engines and
17680-633: The flight deck contained windows looking into the payload bay, as well as an RHC to control the Remote Manipulator System during cargo operations. Additionally, the aft flight deck had monitors for a closed-circuit television to view the cargo bay. The mid-deck contained the crew equipment storage, sleeping area, galley, medical equipment, and hygiene stations for the crew. The crew used modular lockers to store equipment that could be scaled depending on their needs, as well as permanently installed floor compartments. The mid-deck contained
17850-465: The flight, backing up both Hurley and Behnken for the mission. The mission insignia was designed by artist Andrew Nyberg from Brainerd, Minnesota , a nephew of spacecraft commander Hurley. The insignia features the logos of the Commercial Crew Program , Falcon 9 , Crew Dragon , and the red chevron of NASA's "meatball" insignia . Also depicted are the American flag and a graphic representation of
18020-850: The floating barge Of Course I Still Love You , which was prepositioned in the Atlantic Ocean. President Donald Trump and Vice President Mike Pence , with their wives, were at Kennedy Space Center in Florida to see the launch attempt on 27 May 2020, and returned for launch on 30 May 2020. The launch live stream was watched online by 3 million people on NASA feeds, and the SpaceX feed peaked at 4.1 million viewers. NASA estimated roughly 10 million people watched on various online platforms, approximately 150,000 people gathered on Florida's space coast in addition to an unknown number watching on television. Hurley and Behnken described Falcon 9 as
18190-498: The forward separation motors and the parachute systems that were used during recovery. The rocket nozzles could gimbal up to 8° to allow for in-flight adjustments. The rocket motors were each filled with a total 500,000 kg (1,106,640 lb) of solid rocket propellant ( APCP + PBAN ), and joined in the Vehicle Assembly Building (VAB) at KSC. In addition to providing thrust during the first stage of launch,
18360-670: The general rule for space vehicles were the US Gemini SC-2 , the Soviet Union spacecraft Vozvraschaemyi Apparat (VA) , the US Space Shuttle orbiter (mid-1970s-2011, with 135 flights between 1981 and 2011) and the Soviet Buran (1980-1988, with just one uncrewed test flight in 1988). Both of these spaceships were also an integral part of the launch system (providing launch acceleration) as well as operating as medium-duration spaceships in space . This began to change in
18530-535: The ground, in order to retrieve and reuse the vehicle. As of 2021 , SpaceX is building and testing the Starship spaceship to be capable of surviving multiple hypersonic reentries through the atmosphere so that they become truly reusable long-duration spaceships; no Starship operational flights have yet occurred. With possible inflatable heat shields , as developed by the US (Low Earth Orbit Flight Test Inflatable Decelerator - LOFTID) and China, single-use rockets like
18700-535: The hours leading up to splashdown noting "hazardous space operations" and the Federal Aviation Administration (FAA) restricted air traffic in the area in a NOTAM . Endeavour stayed docked to the ISS for 62 days, 9 hours and 8 minutes, undocking at 23:35 UTC on 1 August 2020. At the time of undocking, Endeavour weighed approximately 12,520 kg (27,600 lb). The capsule completed four departure burns to move away from
18870-400: The inner leading edge and 45° at the outer leading edge. Each wing had an inboard and outboard elevon to provide flight control during reentry, along with a flap located between the wings, below the engines to control pitch . The orbiter's vertical stabilizer was swept backwards at 45° and contained a rudder that could split to act as a speed brake . The vertical stabilizer also contained
19040-531: The last of three hatches between Endeavour and ISS was opened and Hurley and Behnken boarded the ISS at 17:22 UTC, welcomed by and joining the ISS Expedition 63 crew, consisting of NASA astronaut Christopher "Chris" Cassidy and Russian cosmonauts Anatoly Ivanishin and Ivan Vagner . Over their time aboard the ISS, Hurley and Behnken spent over 100 hours completing science experiments, while traveling 27 million miles over their 1024 orbits of
19210-575: The late 1950s, the Air Force began developing the partially reusable X-20 Dyna-Soar . The Air Force collaborated with NASA on the Dyna-Soar and began training six pilots in June 1961. The rising costs of development and the prioritization of Project Gemini led to the cancellation of the Dyna-Soar program in December 1963. In addition to the Dyna-Soar, the Air Force had conducted a study in 1957 to test
19380-587: The launch date as 27 May 2020. The arrival of the Crew Dragon will have raised the station's crew size from three to five. Bob Behnken and Doug Hurley will have performed duties and conducted experiments as crew on board the ISS for several months. Hurley and Behnken were expected to live and work aboard the space station for two or three months, and then return to Earth for a splashdown in the Atlantic Ocean east of Cape Canaveral . NASA Administrator Jim Bridenstine urged space enthusiasts not to travel to
19550-486: The launch pad, the Space Shuttle was used to verify the proper positioning of the launch complex hardware. Enterprise was taken back to California in August 1979, and later served in the development of the SLC-6 at Vandenberg AFB in 1984. On November 24, 1980, Columbia was mated with its external tank and solid-rocket boosters, and was moved to LC-39 on December 29. The first Space Shuttle mission, STS-1 , would be
19720-432: The launch vehicle beforehand. Since at least in the early 20th century, single-stage-to-orbit reusable launch vehicles have existed in science fiction . In the 1970s, the first reusable launch vehicle, the Space Shuttle , was developed. However, in the 1990s, due to the program's failure to meet expectations, reusable launch vehicle concepts were reduced to prototype testing. The rise of private spaceflight companies in
19890-467: The launch was branded as " Launch America ", with its own logo. The SpaceX patch shows the top of the company's spacesuit, with the ISS and North America portrayed on the helmet shield and a white star denoting the launch site at Cape Canaveral . Behind the suit are the American flag, and around the insignia's black border SPACEX DRAGON and NASA DEMO-2 are written in white, alongside the names of
20060-561: The mid-2010s. In the 2010s, the space transport cargo capsule from one of the suppliers resupplying the International Space Station was designed for reuse, and after 2017, NASA began to allow the reuse of the SpaceX Dragon cargo spacecraft on these NASA-contracted transport routes. This was the beginning of design and operation of a reusable space vehicle . The Boeing Starliner capsules also reduce their fall speed with parachutes and deploy an airbag shortly before touchdown on
20230-437: The mission specialists who were specifically trained for their intended missions and systems. Early in the Space Shuttle program, NASA flew with payload specialists, who were typically systems specialists who worked for the company paying for the payload's deployment or operations. The final payload specialist, Gregory B. Jarvis , flew on STS-51-L , and future non-pilots were designated as mission specialists. An astronaut flew as
20400-629: The mission. This included orbital laboratories, boosters for launching payloads farther into space, the Remote Manipulator System (RMS), and optionally the EDO pallet to extend the mission duration. To limit the fuel consumption while the orbiter was docked at the ISS, the Station-to-Shuttle Power Transfer System (SSPTS) was developed to convert and transfer station power to the orbiter. The SSPTS
20570-480: The nine Merlin engines a powering a Falcon 9 launched for the 22nd time, making it the most reused liquid fuel engine used in an operational manner, having already surpassed Space Shuttle Main Engine number 2019's record of 19 flights. As of 2024, Falcon 9 and Falcon Heavy are the only orbital rockets to reuse their boosters, although multiple other systems are in development. All aircraft-launched rockets reuse
20740-559: The nose cone was closed. Drogue chutes deployed at 18:44 UTC for approximately one minute, drawing out main parachute deployment approximately one minute later. A maximum of 4 g was experienced by Dragon capsule and its crew during the re-entry period. Endeavour returned to Earth with 150 kg (330 lb) of cargo including 90 kg (200 lb) of science cargo, mostly kept in freezers. Sixty-three days, 23 hours, 25 minutes and 21 seconds after launch, at 18:48:06 UTC on 2 August 2020, Endeavour splashed down off
20910-431: The operational mission. The Space Shuttle was not launched if its flight would run from December to January, as its flight software would have required the orbiter vehicle's computers to be reset at the year change. In 2007, NASA engineers devised a solution so Space Shuttle flights could cross the year-end boundary. Space Shuttle missions typically brought a portable general support computer (PGSC) that could integrate with
21080-424: The optimal design for a reusable spacecraft, and issued study contracts to General Dynamics , Lockheed , McDonnell Douglas , and North American Rockwell . In July 1969, the Space Shuttle Task Group issued a report that determined the Shuttle would support short-duration crewed missions and space station, as well as the capabilities to launch, service, and retrieve satellites. The report also created three classes of
21250-432: The orange foam itself was sufficiently protected, and the ET was no longer covered in latex paint beginning on STS-3. A light-weight tank (LWT) was first flown on STS-6, which reduced tank weight by 4,700 kg (10,300 lb). The LWT's weight was reduced by removing components from the hydrogen tank and reducing the thickness of some skin panels. In 1998, a super light-weight ET (SLWT) first flew on STS-91 . The SLWT used
21420-437: The orbiter vehicle 18 seconds after engine cutoff and could be triggered automatically or manually. At the time of separation, the orbiter vehicle retracted its umbilical plates, and the umbilical cords were sealed to prevent excess propellant from venting into the orbiter vehicle. After the bolts attached at the structural attachments were sheared, the ET separated from the orbiter vehicle. At the time of separation, gaseous oxygen
21590-706: The orbiter vehicle's computers and communication suite, as well as monitor scientific and payload data. Early missions brought the Grid Compass , one of the first laptop computers, as the PGSC, but later missions brought Apple and Intel laptops. The payload bay comprised most of the orbiter vehicle's fuselage , and provided the cargo-carrying space for the Space Shuttle's payloads. It was 18 m (60 ft) long and 4.6 m (15 ft) wide, and could accommodate cylindrical payloads up to 4.6 m (15 ft) in diameter. Two payload bay doors hinged on either side of
21760-402: The orbiter's flight deck using their windows and closed-circuit television. The RMS allowed for six degrees of freedom and had six joints located at three points along the arm. The original RMS could deploy or retrieve payloads up to 29,000 kg (65,000 lb), which was later improved to 270,000 kg (586,000 lb). The Spacelab module was a European-funded pressurized laboratory that
21930-497: The overall risk of a loss of mission (LOM) as 1-in-60, covering scenarios where the Crew Dragon does not reach the space station as planned, but the crew safely returns to Earth. The Crew Dragon Demo-2 mission was initially planned for launch in July 2019 as part of the Commercial Crew Program contract with a crew of two on a 14-day test mission to the ISS. The Crew Dragon capsule from the Crew Dragon Demo-1 mission
22100-818: The presence of the public at the Kennedy Space Center Visitor Complex due to the COVID-19 pandemic . As the mission was previously delayed, the Visitor Complex opened as of 28 May 2020 with limited capacity for publicly viewing the launch. Admissions sold out almost immediately. To engage the public, notably the Class of 2020, who were unable to attend their graduations due to the COVID-19 pandemic, both NASA and SpaceX invited students and graduates to submit their photos to be flown to
22270-405: The program's lifetime. STS-6 and STS-7 used SRBs 2,300 kg (5,000 lb) lighter due to walls that were 0.10 mm (.004 in) thinner, but were determined to be too thin to fly safely. Subsequent flights until STS-26 used cases that were 0.076 mm (.003 in) thinner than the standard-weight cases, which reduced 1,800 kg (4,000 lb). After the Challenger disaster as
22440-400: The propellant for the Space Shuttle Main Engines, and connected the orbiter vehicle with the solid rocket boosters. The ET was 47 m (153.8 ft) tall and 8.4 m (27.6 ft) in diameter, and contained separate tanks for liquid oxygen and liquid hydrogen. The liquid oxygen tank was housed in the nose of the ET, and was 15 m (49.3 ft) tall. The liquid hydrogen tank comprised
22610-461: The requirements of the Space Shuttle; in July 1971, it issued a contract to Rocketdyne to begin development on the RS-25 engine. NASA reviewed 29 potential designs for the Space Shuttle and determined that a design with two side boosters should be used, and the boosters should be reusable to reduce costs. NASA and the Air Force elected to use solid-propellant boosters because of the lower costs and
22780-683: The reusability of the orbiter required a multi-use heat shield. During reentry, the TPS experienced temperatures up to 1,600 °C (3,000 °F), but had to keep the orbiter vehicle's aluminum skin temperature below 180 °C (350 °F). The TPS primarily consisted of four types of tiles. The nose cone and leading edges of the wings experienced temperatures above 1,300 °C (2,300 °F), and were protected by reinforced carbon-carbon tiles (RCC). Thicker RCC tiles were developed and installed in 1998 to prevent damage from micrometeoroid and orbital debris , and were further improved after RCC damage caused in
22950-404: The second and third stages. Only the Space Shuttle has achieved a reuse of the orbital insertion stage, by using the engines and fuel tank of its orbiter . The Buran spaceplane and Starship spacecraft are two other reusable spacecraft that were designed to be able to act as orbital insertion stages and have been produced, however the former only made one uncrewed test flight before the project
23120-502: The second day of the flight with Black Sabbath 's " Planet Caravan ". NASA began a tradition of playing music to astronauts during the Gemini program, and first used music to wake up a flight crew during Apollo 15 . Each track is specially chosen, often by the astronauts' families, and usually has a special meaning to an individual member of the crew, or is applicable to their daily activities. Nineteen hours later, Endeavour approached
23290-471: The service section took place, as there were abnormally high levels of dinitrogen tetroxide detected around the capsule. Hurley and Behnken were then greeted by crew aboard GO Navigator and were subsequently helped out of the capsule and onto stretchers where they were taken into the onboard medical facility, before taking a helicopter back to land. Post-flight analysis of the Dragon's heat shield revealed higher-than-expected erosion at four points where
23460-525: The shuttle could then be constructed of lightweight aluminum , and the tiles could be individually replaced as needed. Construction began on Columbia on March 27, 1975, and it was delivered to the KSC on March 25, 1979. At the time of its arrival at the KSC, Columbia still had 6,000 of its 30,000 tiles remaining to be installed. However, many of the tiles that had been originally installed had to be replaced, requiring two years of installation before Columbia could fly. On January 5, 1979, NASA commissioned
23630-641: The space flight industry. So much so that in 2024, the Cape Canaveral Space Force Station initiated a 50 year forward looking plan for the Cape that involved major infrastructure upgrades (including to Port Canaveral ) to support a higher anticipated launch cadence and landing sites for the new generation of vehicles. Reusable launch systems may be either fully or partially reusable. Several companies are currently developing fully reusable launch vehicles as of March 2024. Each of them
23800-476: The spacecraft. In addition, SpaceX noted that the parachutes were deployed lower than expected, but still within the allowable range. To address the issue, the instrument used to measure barometric pressure which determines altitude was replaced. Note: all times in UTC Endeavour was refurbished and reused for the SpaceX Crew-2 mission that launched on 23 April 2021. Alongside, Bob's seat of
23970-506: The stagnant gas inside the cones before ignition. Failure to burn these gases could trip the onboard sensors and create the possibility of an overpressure and explosion of the vehicle during the firing phase. The hydrogen tank's prevalves were opened at T−9.5 seconds in preparation for engine start. Reusable launch system Reusable launch vehicles may contain additional avionics and propellant , making them heavier than their expendable counterparts. Reused parts may need to enter
24140-486: The two astronauts at the bottom; with a cloverleaf between the two names. NASA calculated the loss-of-crew (LOC) probability for the test flight as 1-in-276, better than the commercial crew program requirement threshold of 1-in-270. The 1-in-276 number included mitigations to reduce the risk, such as on-orbit inspections of the Crew Dragon spacecraft once it was docked to the space station to look for damage from micrometeoroids and orbital debris (MMOD). NASA pegged
24310-414: The underside of Columbia , and determined there was no damage. Columbia reentered the atmosphere and landed at Edwards AFB on April 14. NASA conducted three additional test flights with Columbia in 1981 and 1982. On July 4, 1982, STS-4 , flown by Ken Mattingly and Henry Hartsfield , landed on a concrete runway at Edwards AFB. President Ronald Reagan and his wife Nancy met the crew, and delivered
24480-465: The upper parts of the orbiter vehicle were coated in tiles of white low-temperature reusable surface insulation with similar composition, which provided protection for temperatures below 650 °C (1,200 °F). The payload bay doors and parts of the upper wing surfaces were coated in reusable Nomex felt surface insulation or in beta cloth , as the temperature there remained below 370 °C (700 °F). The Space Shuttle external tank (ET) carried
24650-589: The validation of crewed spaceflight operations using SpaceX hardware and received human-rating certification for the spacecraft, including astronaut testing of Crew Dragon capabilities on orbit. Docking was autonomously controlled by the Crew Dragon, but monitored by the flight crew in case manual intervention became necessary. The spacecraft soft docked with the International Space Station on 31 May 2020, nineteen hours after launch. Following soft capture, 12 hooks were closed to complete
24820-444: Was 45 m (149.2 ft) tall and 3.7 m (12.2 ft) wide, weighed 68,000 kg (150,000 lb), and had a steel exterior approximately 13 mm (.5 in) thick. The SRB's subcomponents were the solid-propellant motor, nose cone, and rocket nozzle. The solid-propellant motor comprised the majority of the SRB's structure. Its casing consisted of 11 steel sections which made up its four main segments. The nose cone housed
24990-499: Was Space Shuttle-specific software that provided control through all phases of flight. During ascent, maneuvering, reentry, and landing, the four PASS GPCs functioned identically to produce quadruple redundancy and would error check their results. In case of a software error that would cause erroneous reports from the four PASS GPCs, a fifth GPC ran the Backup Flight System, which used a different program and could control
25160-639: Was a modified airport jet bridge that was used to assist astronauts to egress from the orbiter after landing, where they would undergo their post-mission medical checkups. The Astrovan transported astronauts from the crew quarters in the Operations and Checkout Building to the launch pad on launch day. The NASA Railroad comprised three locomotives that transported SRB segments from the Florida East Coast Railway in Titusville to
25330-461: Was canceled after the last study of the design in 1967 due to a lack of funds for development. NASA started the Space Shuttle design process in 1968, with the vision of creating a fully reusable spaceplane using a crewed fly-back booster . This concept proved expensive and complex, therefore the design was scaled back to reusable solid rocket boosters and an expendable external tank . Space Shuttle Columbia launched and landed 27 times and
25500-689: Was canceled in 1993. In the late 1980s a fully reusable version of the Energia rocket, the Energia II, was proposed. Its boosters and core would have had the capability of landing separately on a runway. In the 1990s the McDonnell Douglas Delta Clipper VTOL SSTO proposal progressed to the testing phase. The DC-X prototype demonstrated rapid turnaround time and automatic computer control. In mid-1990s, British research evolved an earlier HOTOL design into
25670-431: Was cancelled, and the latter is not yet operational, having completed four orbital test flights , as of June 2024, which achieved all of its mission objectives at the fourth flight. Launch systems can be combined with reusable spaceplanes or capsules. The Space Shuttle orbiter , SpaceShipTwo , Dawn Mk-II Aurora, and the under-development Indian RLV-TD are examples for a reusable space vehicle (a spaceplane ) as well as
25840-462: Was carried for 5.6 km (3.5 mi) to Launch Complex 39 by one of the crawler-transporters . After the Space Shuttle arrived at one of the two launchpads, it would connect to the Fixed and Rotation Service Structures, which provided servicing capabilities, payload insertion, and crew transportation. The crew was transported to the launch pad at T−3 hours and entered the orbiter vehicle, which
26010-461: Was carried within the payload bay and allowed for scientific research while in orbit. The Spacelab module contained two 2.7 m (9 ft) segments that were mounted in the aft end of the payload bay to maintain the center of gravity during flight. Astronauts entered the Spacelab module through a 2.7 or 5.8 m (8.72 or 18.88 ft) tunnel that connected to the airlock. The Spacelab equipment
26180-560: Was closed at T−2 hours. Liquid oxygen and hydrogen were loaded into the external tank via umbilicals that attached to the orbiter vehicle, which began at T−5 hours 35 minutes. At T−3 hours 45 minutes, the hydrogen fast-fill was complete, followed 15 minutes later by the oxygen tank fill. Both tanks were slowly filled up until the launch as the oxygen and hydrogen evaporated. The launch commit criteria considered precipitation, temperatures, cloud cover, lightning forecast, wind, and humidity. The Space Shuttle
26350-681: Was completed on September 17, 1976, and Enterprise was moved to the Edwards Air Force Base to begin testing. Rockwell constructed the Main Propulsion Test Article (MPTA)-098 , which was a structural truss mounted to the ET with three RS-25 engines attached. It was tested at the National Space Technology Laboratory (NSTL) to ensure that the engines could safely run through the launch profile. Rockwell conducted mechanical and thermal stress tests on Structural Test Article (STA)-099 to determine
26520-414: Was destroyed while its SuperDraco thrusters were undergoing static fire testing on 20 April 2019, ahead of its planned use for the in-flight abort test . SpaceX traced the cause of the anomaly to a component that leaked oxidizer into the high-pressure helium lines, which then solidified and damaged a valve. The valves were since switched for burst discs to prevent another anomaly. On 19 January 2020,
26690-549: Was entirely reliant on its main computer, the Data Processing System (DPS). The DPS controlled the flight controls and thrusters on the orbiter, as well as the ET and SRBs during launch. The DPS consisted of five general-purpose computers (GPC), two magnetic tape mass memory units (MMUs), and the associated sensors to monitor the Space Shuttle components. The original GPC used was the IBM AP-101B , which used
26860-657: Was equipped with an avionics system to provide information and control during atmospheric flight. Its avionics suite contained three microwave scanning beam landing systems , three gyroscopes , three TACANs , three accelerometers , two radar altimeters , two barometric altimeters , three attitude indicators , two Mach indicators , and two Mode C transponders . During reentry, the crew deployed two air data probes once they were traveling slower than Mach 5. The orbiter had three inertial measuring units (IMU) that it used for guidance and navigation during all phases of flight. The orbiter contains two star trackers to align
27030-650: Was first flown in 1975, and was used for the ALT and ferrying the orbiter from Edwards AFB to the KSC on all missions prior to 1991. A second SCA (N911NA) was acquired in 1988, and was first used to transport Endeavour from the factory to the KSC. Following the retirement of the Space Shuttle, N905NA was put on display at the JSC, and N911NA was put on display at the Joe Davies Heritage Airpark in Palmdale, California . The Crew Transport Vehicle (CTV)
27200-467: Was first used on STS-118, and was installed on Discovery and Endeavour . The Remote Manipulator System (RMS), also known as Canadarm, was a mechanical arm attached to the cargo bay. It could be used to grasp and manipulate payloads, as well as serve as a mobile platform for astronauts conducting an EVA. The RMS was built by the Canadian company Spar Aerospace and was controlled by an astronaut inside
27370-402: Was located below the flight deck and was where the galley and crew bunks were set up, as well as three or four crew member seats. The mid-deck contained the airlock, which could support two astronauts on an extravehicular activity (EVA), as well as access to pressurized research modules. An equipment bay was below the mid-deck, which stored environmental control and waste management systems. On
27540-444: Was lost with all crew on the 28th landing attempt; Challenger launched and landed 9 times and was lost with all crew on the 10th launch attempt; Discovery launched and landed 39 times; Atlantis launched and landed 33 times; Endeavour launched and landed 25 times. In 1986 President Ronald Reagan called for an air-breathing scramjet National Aerospace Plane (NASP)/ X-30 . The project failed due to technical issues and
27710-617: Was moved to the Marshall Space Flight Center (MSFC) on March 13, 1978. Enterprise underwent shake tests in the Mated Vertical Ground Vibration Test, where it was attached to an external tank and solid rocket boosters, and underwent vibrations to simulate the stresses of launch. In April 1979, Enterprise was taken to the KSC, where it was attached to an external tank and solid rocket boosters, and moved to LC-39 . Once installed at
27880-601: Was never used). The Johnson Space Center (JSC) served as the central point for all Shuttle operations and the MSFC was responsible for the main engines, external tank, and solid rocket boosters. The John C. Stennis Space Center handled main engine testing, and the Goddard Space Flight Center managed the global tracking network. The orbiter had design elements and capabilities of both a rocket and an aircraft to allow it to launch vertically and then land as
28050-419: Was not launched under conditions where it could have been struck by lightning , as its exhaust plume could have triggered lightning by providing a current path to ground after launch, which occurred on Apollo 12 . The NASA Anvil Rule for a Shuttle launch stated that an anvil cloud could not appear within a distance of 19 km (10 nmi). The Shuttle Launch Weather Officer monitored conditions until
28220-427: Was primarily stored in pallets, which provided storage for both experiments as well as computer and power equipment. Spacelab hardware was flown on 28 missions through 1999 and studied subjects including astronomy, microgravity, radar, and life sciences. Spacelab hardware also supported missions such as Hubble Space Telescope (HST) servicing and space station resupply. The Spacelab module was tested on STS-2 and STS-3, and
28390-483: Was separately working on crewed orbital spaceflight under the same NASA effort. Doug Hurley and Bob Behnken were announced as the primary crew on 3 August 2018. Both astronauts are veterans of the Space Shuttle program, and the Demo-2 flight was the third trip to space for both of them. The lead flight director for this mission was Zebulon Scoville. NASA astronaut Kjell Lindgren was the sole backup crew member for
28560-501: Was the only item funded for development. The first ( STS-1 ) of four orbital test flights occurred in 1981, leading to operational flights ( STS-5 ) beginning in 1982. Five complete Space Shuttle orbiter vehicles were built and flown on a total of 135 missions from 1981 to 2011. They launched from the Kennedy Space Center (KSC) in Florida . Operational missions launched numerous satellites , interplanetary probes , and
28730-444: Was the top level of the crew compartment and contained the flight controls for the orbiter. The commander sat in the front left seat, and the pilot sat in the front right seat, with two to four additional seats set up for additional crew members. The instrument panels contained over 2,100 displays and controls, and the commander and pilot were both equipped with a heads-up display (HUD) and a Rotational Hand Controller (RHC) to gimbal
28900-549: Was vented from the nose to cause the ET to tumble, ensuring that it would break up upon reentry. The ET was the only major component of the Space Shuttle system that was not reused, and it would travel along a ballistic trajectory into the Indian or Pacific Ocean. For the first two missions, STS-1 and STS-2 , the ET was covered in 270 kg (595 lb) of white fire-retardant latex paint to provide protection against damage from ultraviolet radiation. Further research determined that
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