101-1011: The Grumman Aircraft Engineering Corporation , later Grumman Aerospace Corporation , was a 20th century American producer of military and civilian aircraft . Founded on December 6, 1929, by Leroy Grumman and his business partners, it merged in 1994 with Northrop Corporation to form Northrop Grumman . Leroy Grumman worked for the Loening Aircraft Engineering Corporation beginning in 1920. In 1929, Keystone Aircraft Corporation bought Loening Aircraft and moved its operations from New York City to Bristol, Pennsylvania . Grumman and three other ex-Loening Aircraft employees, ( Edmund Ward Poor , William Schwendler, and Jake Swirbul ) started their own company in an old Cox-Klemin Aircraft Co. factory in Baldwin on Long Island , New York. The company registered as
202-404: A combustion chamber , and accelerate the exhaust rearwards to provide thrust. Different jet engine configurations include the turbojet and turbofan , sometimes with the addition of an afterburner . Those with no rotating turbomachinery include the pulsejet and ramjet . These mechanically simple engines produce no thrust when stationary, so the aircraft must be launched to flying speed using
303-433: A lifting gas such as helium , hydrogen or hot air , which is less dense than the surrounding air. When the weight of the lifting gas is added to the weight of the aircraft itself, it is same or less than the mass of the air that the craft displaces. Small hot-air balloons, called sky lanterns , were first invented in ancient China prior to the 3rd century BC and used primarily in cultural celebrations, and were only
404-516: A June 2018 governmental reorganization plan, the Donald Trump administration proposed turning USPS into "a private postal operator" which could save costs through measures like delivering mail fewer days per week, or delivering to central locations instead of door to door. There was strong bipartisan opposition to the idea in Congress. In April 2020, Congress approved a $ 10 billion loan from
505-943: A board member its new parent, XPO Logistics , whose postal contracts expanded during DeJoy's postmaster general role—was a major donor and fundraiser for the Republican Party (from 2017, a deputy finance chairman of the Republican National Committee , until appointed postmaster general, and later million-dollar donor to the 2020 Trump campaign while postmaster general). DeJoy immediately began taking measures to reduce costs, such as banning overtime and extra trips to deliver mail. While DeJoy admitted that these measures were causing delays in mail delivery , he said they would eventually improve service. More than 600 high-speed mail sorting machines were scheduled to be dismantled and removed from postal facilities, raising concerns that mailed ballots for
606-504: A business on December 6, 1929, and officially opened on January 2, 1930. While maintaining the business by welding aluminum tubing for truck frames, the company eagerly pursued contracts with the US Navy . Grumman designed the first practical floats with a retractable landing gear for the Navy, and this launched Grumman into the aviation market. The first Grumman aircraft was also for the Navy,
707-560: A catapult, like the V-1 flying bomb , or a rocket, for example. Other engine types include the motorjet and the dual-cycle Pratt & Whitney J58 . Compared to engines using propellers, jet engines can provide much higher thrust, higher speeds and, above about 40,000 ft (12,000 m), greater efficiency. They are also much more fuel-efficient than rockets . As a consequence nearly all large, high-speed or high-altitude aircraft use jet engines. Some rotorcraft, such as helicopters , have
808-638: A greater wingspan (94m/260 ft) than any current aircraft and a tail height equal to the tallest (Airbus A380-800 at 24.1m/78 ft) — flew only one short hop in the late 1940s and never flew out of ground effect . The largest civilian airplanes, apart from the above-noted An-225 and An-124, are the Airbus Beluga cargo transport derivative of the Airbus A300 jet airliner, the Boeing Dreamlifter cargo transport derivative of
909-633: A high number of packages, and an electric delivery vehicle produced in partnership with Canoo that is a "pod-like" smaller van. The Department of Defense and the USPS jointly operate a postal system to deliver mail for the military ; this is known as the Army Post Office (for Army and Air Force postal facilities) and the Fleet Post Office (for Navy , Marine Corps , and Coast Guard postal facilities). In fiscal year 2022,
1010-674: A marginal case. The forerunner of the fixed-wing aircraft is the kite . Whereas a fixed-wing aircraft relies on its forward speed to create airflow over the wings, a kite is tethered to the ground and relies on the wind blowing over its wings to provide lift. Kites were the first kind of aircraft to fly and were invented in China around 500 BC. Much aerodynamic research was done with kites before test aircraft, wind tunnels , and computer modelling programs became available. The first heavier-than-air craft capable of controlled free-flight were gliders . A glider designed by George Cayley carried out
1111-794: A maximum loaded weight of 550–700 t (1,210,000–1,540,000 lb), it was also the heaviest aircraft built to date. It could cruise at 500 mph (800 km/h; 430 kn). The aircraft was destroyed during the Russo-Ukrainian War . The largest military airplanes are the Ukrainian Antonov An-124 Ruslan (world's second-largest airplane, also used as a civilian transport), and American Lockheed C-5 Galaxy transport, weighing, loaded, over 380 t (840,000 lb). The 8-engine, piston/propeller Hughes H-4 Hercules "Spruce Goose" — an American World War II wooden flying boat transport with
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#17327727632601212-546: A monopoly on traditional letter delivery within the U.S. and operates under a universal service obligation (USO), both of which are defined across a broad set of legal mandates, which obligate it to provide uniform price and quality across the entirety of its service area. The Post Office has exclusive access to letter boxes marked "U.S. Mail" and personal letterboxes in the U.S., but has to compete against private package delivery services, such as United Parcel Service , FedEx , and DHL . The first national postal agency in
1313-569: A payload of up to 22,050 lb (10,000 kg). The largest aircraft by weight and largest regular fixed-wing aircraft ever built, as of 2016 , was the Antonov An-225 Mriya . That Soviet-built ( Ukrainian SSR ) six-engine transport of the 1980s was 84 m (276 ft) long, with an 88 m (289 ft) wingspan. It holds the world payload record, after transporting 428,834 lb (194,516 kg) of goods, and has flown 100 t (220,000 lb) loads commercially. With
1414-461: A plan to close about 3,700 small post offices. Various representatives in Congress protested, and the Senate passed a bill that would have kept open all post offices farther than 10 miles (16 km) from the next office. In May 2012, the service announced it had modified its plan. Instead, rural post offices would remain open with reduced retail hours (some as little as two hours per day) unless there
1515-588: A powered "tug" aircraft. For a glider to maintain its forward air speed and lift, it must descend in relation to the air (but not necessarily in relation to the ground). Many gliders can "soar", i.e. , gain height from updrafts such as thermal currents. The first practical, controllable example was designed and built by the British scientist and pioneer George Cayley , whom many recognise as the first aeronautical engineer. Common examples of gliders are sailplanes , hang gliders and paragliders . Balloons drift with
1616-491: A powered rotary wing or rotor , where the rotor disc can be angled slightly forward so that a proportion of its lift is directed forwards. The rotor may, like a propeller, be powered by a variety of methods such as a piston engine or turbine. Experiments have also used jet nozzles at the rotor blade tips . Aircraft are designed according to many factors such as customer and manufacturer demand, safety protocols and physical and economic constraints. For many types of aircraft
1717-577: A rigid basket or gondola slung below it to carry its payload. Early aircraft, including airships , often employed flexible doped aircraft fabric covering to give a reasonably smooth aeroshell stretched over a rigid frame. Later aircraft employed semi- monocoque techniques, where the skin of the aircraft is stiff enough to share much of the flight loads. In a true monocoque design there is no internal structure left. The key structural parts of an aircraft depend on what type it is. Lighter-than-air types are characterised by one or more gasbags, typically with
1818-555: A state-by-state analysis concluded that 76% of Americans were eligible to vote by mail in 2020, a record number. The analysis predicted that 80 million ballots could be cast by mail in 2020 – more than double the number in 2016. The Postal Service sent letters to 46 states in July 2020, warning that the service might not be able to meet each state's deadlines for requesting and casting last-minute absentee ballots. The House of Representatives voted to include an emergency grant of $ 25 billion to
1919-420: A supporting structure of flexible cables or a rigid framework called its hull. Other elements such as engines or a gondola may also be attached to the supporting structure. Heavier-than-air types are characterised by one or more wings and a central fuselage . The fuselage typically also carries a tail or empennage for stability and control, and an undercarriage for takeoff and landing. Engines may be located on
2020-535: A wave of mergers as aerospace companies shrank in number; in 1994 Northrop bought Grumman for $ 2.1 billion to form Northrop Grumman , after Northrop topped a $ 1.9 billion offer from Martin Marietta . The new company closed almost all of its facilities on Long Island and converted the Bethpage plant to a residential and office complex, with its headquarters becoming the corporate headquarters for Cablevision and
2121-522: Is a lifting body , which has no wings, though it may have small stabilizing and control surfaces. Wing-in-ground-effect vehicles are generally not considered aircraft. They "fly" efficiently close to the surface of the ground or water, like conventional aircraft during takeoff. An example is the Russian ekranoplan nicknamed the " Caspian Sea Monster ". Man-powered aircraft also rely on ground effect to remain airborne with minimal pilot power, but this
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#17327727632602222-437: Is a powered one. A powered, steerable aerostat is called a dirigible . Sometimes this term is applied only to non-rigid balloons, and sometimes dirigible balloon is regarded as the definition of an airship (which may then be rigid or non-rigid). Non-rigid dirigibles are characterized by a moderately aerodynamic gasbag with stabilizing fins at the back. These soon became known as blimps . During World War II , this shape
2323-1127: Is normally called the powerplant , and includes engine or motor , propeller or rotor , (if any), jet nozzles and thrust reversers (if any), and accessories essential to the functioning of the engine or motor (e.g.: starter , ignition system , intake system , exhaust system , fuel system , lubrication system, engine cooling system , and engine controls ). Powered aircraft are typically powered by internal combustion engines ( piston or turbine ) burning fossil fuels —typically gasoline ( avgas ) or jet fuel . A very few are powered by rocket power , ramjet propulsion, or by electric motors , or by internal combustion engines of other types, or using other fuels. A very few have been powered, for short flights, by human muscle energy (e.g.: Gossamer Condor ). The avionics comprise any electronic aircraft flight control systems and related equipment, including electronic cockpit instrumentation, navigation, radar , monitoring, and communications systems . United States Postal Service The United States Postal Service ( USPS ), also known as
2424-413: Is now being delivered in two days instead of one. Large commercial mailers can still have first-class mail delivered overnight if delivered directly to a processing center in the early morning, though as of 2014 this represented only 11% of first-class mail. Unsorted first-class mail will continue to be delivered anywhere in the contiguous United States within three days. In July 2011, the USPS announced
2525-452: Is only because they are so underpowered—in fact, the airframe is capable of flying higher. Rotorcraft, or rotary-wing aircraft, use a spinning rotor with aerofoil cross-section blades (a rotary wing ) to provide lift. Types include helicopters , autogyros , and various hybrids such as gyrodynes and compound rotorcraft. Helicopters have a rotor turned by an engine-driven shaft. The rotor pushes air downward to create lift. By tilting
2626-497: Is projected to raise approximately $ 50 million per year. (Shipping alcoholic beverages is currently illegal under 18 U.S.C. § 1716 (f).) In 2014, the Postal Service was requesting reforms to workers' compensation, moving from a pension to defined contribution retirement savings plan, and paying senior retiree health care costs out of Medicare funds, as is done for private-sector workers. As part of
2727-623: Is stored in tanks, usually in the wings but larger aircraft also have additional fuel tanks in the fuselage . Propeller aircraft use one or more propellers (airscrews) to create thrust in a forward direction. The propeller is usually mounted in front of the power source in tractor configuration but can be mounted behind in pusher configuration . Variations of propeller layout include contra-rotating propellers and ducted fans . Many kinds of power plant have been used to drive propellers. Early airships used man power or steam engines . The more practical internal combustion piston engine
2828-475: Is the Lockheed SR-71 Blackbird , a U.S. reconnaissance jet fixed-wing aircraft, having reached 3,530 km/h (2,193 mph) on 28 July 1976. Gliders are heavier-than-air aircraft that do not employ propulsion once airborne. Take-off may be by launching forward and downward from a high location, or by pulling into the air on a tow-line, either by a ground-based winch or vehicle, or by
2929-465: Is the peak period for the Postal Service, representing a total volume of 11.7 billion packages and pieces of mail during this time in 2022. The USPS operates one of the largest civilian vehicle fleets in the world, with over 235,000 vehicles as of 2024, the majority of which are the distinctive and unique Chevrolet / Grumman LLV (long-life vehicle), and the similar, newer Ford-Utilimaster FFV ( flexible-fuel vehicle ), originally also referred to as
3030-629: The Bell Boeing V-22 Osprey ), tiltwing , tail-sitter , and coleopter aircraft have their rotors/ propellers horizontal for vertical flight and vertical for forward flight. The smallest aircraft are toys/recreational items, and nano aircraft . The largest aircraft by dimensions and volume (as of 2016) is the 302 ft (92 m) long British Airlander 10 , a hybrid blimp, with helicopter and fixed-wing features, and reportedly capable of speeds up to 90 mph (140 km/h; 78 kn), and an airborne endurance of two weeks with
3131-693: The Boeing 747 jet airliner/transport (the 747-200B was, at its creation in the 1960s, the heaviest aircraft ever built, with a maximum weight of over 400 t (880,000 lb)), and the double-decker Airbus A380 "super-jumbo" jet airliner (the world's largest passenger airliner). The fastest fixed-wing aircraft and fastest glider, is the Space Shuttle , which re-entered the atmosphere at nearly Mach 25 or 17,500 mph (28,200 km/h) The fastest recorded powered aircraft flight and fastest recorded aircraft flight of an air-breathing powered aircraft
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3232-566: The Consolidated Appropriations Act of 2021 forgave the previous $ 10 billion loan. Voting by mail has become an increasingly common practice in the United States, with 25% of voters nationwide mailing their ballots in 2016 and 2018. The coronavirus pandemic of 2020 was predicted to cause a large increase in mail voting because of the possible danger of congregating at polling places. For the 2020 election,
3333-784: The Environmental Protection Agency and an environmental lawsuit, and also due to availability of new funding provided by the Inflation Reduction Act of 2022 . The Act included $ 3 billion for electric USPS vehicles, supporting the initiative by Postmaster General DeJoy and the Biden Administration to add 66,000 electric vehicles to the fleet by 2028. The electric fleet will be composed of 9,250 EVs manufactured by Ford ; 11,750 commercial off-the-shelf EVs; and 45,000 Oshkosh Next Generation Delivery Vehicles . In February 2023,
3434-717: The Grumman FF-1 , a biplane with retractable landing gear developed at Curtiss Field in 1931. This was followed by a number of other successful designs. During World War II , Grumman became known for its "Cats" (Navy fighter aircraft ): the F4F Wildcat and F6F Hellcat , the Grumman F7F Tigercat and Grumman F8F Bearcat , and also for its torpedo bomber , the Grumman TBF Avenger . Grumman ranked 22nd among United States corporations in
3535-637: The Harrier jump jet and Lockheed Martin F-35B take off and land vertically using powered lift and transfer to aerodynamic lift in steady flight. A pure rocket is not usually regarded as an aerodyne because its flight does not depend on interaction with the air at all (and thus can even fly in the vacuum of outer space ); however, many aerodynamic lift vehicles have been powered or assisted by rocket motors. Rocket-powered missiles that obtain aerodynamic lift at very high speed due to airflow over their bodies are
3636-624: The National Rural Letter Carriers' Association (NRLCA) was contacted for its input on the USPS's current study of the effect of five-day delivery along with developing an implementation plan for a five-day service plan. A team of Postal Service headquarters executives and staff was given a time frame of sixty days to complete the study. The current concept examines the effect of five-day delivery with no business or collections on Saturday, with Post Offices with current Saturday hours remaining open. On Thursday, April 15, 2010,
3737-472: The November 3 election might not reach election offices on time. Mail collection boxes were removed from the streets in many cities; after photos of boxes being removed were spread on social media, a postal service spokesman said they were being moved to higher traffic areas but that the removals would stop until after the election. The inspector general for the postal service opened an investigation into
3838-718: The Post Office , U.S. Mail , or simply the Postal Service , is an independent agency of the executive branch of the United States federal government responsible for providing postal service in the United States, its insular areas and associated states . It is one of a few government agencies explicitly authorized by the Constitution of the United States . As of 2023, the USPS has 525,469 career employees and 114,623 non-career employees. The USPS has
3939-770: The dynamic lift of an airfoil , or, in a few cases, direct downward thrust from its engines. Common examples of aircraft include airplanes , helicopters , airships (including blimps ), gliders , paramotors , and hot air balloons . The human activity that surrounds aircraft is called aviation . The science of aviation, including designing and building aircraft, is called aeronautics . Crewed aircraft are flown by an onboard pilot , whereas unmanned aerial vehicles may be remotely controlled or self-controlled by onboard computers . Aircraft may be classified by different criteria, such as lift type, aircraft propulsion (if any), usage and others. Flying model craft and stories of manned flight go back many centuries; however,
4040-414: The $ 30 billion delivery budget; door-to-door city delivery costs annually on average $ 353 per stop, curbside $ 224, and cluster box $ 160 (and for rural delivery, $ 278, $ 176, and $ 126, respectively). S.1486, also with the support of Postmaster General Donahoe, would also allow the USPS to ship alcohol in compliance with state law, from manufacturers to recipients with ID to show they are over 21. This
4141-435: The 1930s, large intercontinental flying boats were also sometimes referred to as "ships of the air" or "flying-ships". — though none had yet been built. The advent of powered balloons, called dirigible balloons, and later of rigid hulls allowing a great increase in size, began to change the way these words were used. Huge powered aerostats, characterized by a rigid outer framework and separate aerodynamic skin surrounding
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4242-509: The 2010s. In 2012, in order to be able to meet obligations for payroll and continuing its operations, the Postal Service defaulted on payments due for retirements benefits in August and again in September that year. In September 2014, it defaulted on the payments for the fourth time, and continued to default into 2017. The Postal Service sought financial reforms from Congress for relief from
4343-510: The American Postal Workers Union's arguments that these counters should be staffed by postal employees who earn far more and have "a generous package of health and retirement benefits". On January 28, 2009, Postmaster General John E. Potter testified before the Senate that, if the Postal Service could not readjust its payment toward the contractually funding earned employee retiree health benefits, as mandated by
4444-744: The CRV (carrier route vehicle). The LLVs were built from 1987 to 1994 and lack air conditioning, airbags, anti-lock brakes, and space for the large modern volume of e-commerce packages, the Grumman fleet ended its expected 24-year lifespan in fiscal year 2017. The LLV replacement process began in 2015, and after numerous delays, a $ 6 billion contract was awarded in February 2021 to Oshkosh Defense to finalize design and produce 165,000 vehicles over 10 years. The Next Generation Delivery Vehicle (NGDV), will have both gasoline and battery electric versions. Half of
4545-570: The Calverton plant being turned into a business/industrial complex. Former aircraft hangars have become Grumman Studios , a film and television production center. A portion of the airport property has been used for the Grumman Memorial Park. Aircraft An aircraft ( pl. : aircraft) is a vehicle that is able to fly by gaining support from the air . It counters the force of gravity by using either static lift or
4646-680: The Gulfstream I was operated by several regional airlines in scheduled passenger services. The Gulfstream I-C (Grumman model G-159C) version was "stretched" to carry 37 passengers. In the early 1970s, Grumman acquired majority interest in the American Aviation line of very light aircraft -- relabeling its planes as "Grumman-American" or "Grumman American" -- eventually joining it with their Gulfstream division before selling off that combined enterprise in 1978. In 1978, Grumman sold Gulfstream to American Jet Industries , which adopted
4747-591: The Gulfstream name. Since 1999, Gulfstream has been a wholly owned subsidiary of General Dynamics . For much of the Cold War period, Grumman was the largest corporate employer on Long Island . Grumman's products were considered so reliable and ruggedly built that the company was often referred to as the " Grumman Iron Works ". As the company grew, it moved to Valley Stream, New York , then Farmingdale, New York , finally to its facility in Bethpage, New York , with
4848-588: The House Committee on Oversight and Government Reform held a hearing to examine the status of the Postal Service and recent reports on short and long-term strategies for the financial viability and stability of the USPS entitled "Continuing to Deliver: An Examination of the Postal Service's Current Financial Crisis and its Future Viability". At which, PMG Potter testified that by 2020, the USPS cumulative losses could exceed $ 238 billion, and that mail volume could drop 15 percent from 2009. In February 2013,
4949-610: The House and the Senate; President Joe Biden signed the bill into law on April 6, 2022. Congress has limited rate increases for First-Class Mail to the cost of inflation, unless approved by the Postal Regulatory Commission . A three-cent surcharge above inflation increased the 1 oz (28 g) rate to 49¢ in January 2014, but this was approved by the commission for two years only. As of July 14th, 2024
5050-741: The Intruder in 1990. The U.S. Navy still employs the Hawkeye as part of Carrier Air Wings on board aircraft carriers, while the U.S. Marine Corps, the last branch of service to fly the Prowler, retired it on March 8, 2019. Grumman was the chief contractor on the Apollo Lunar Module , the first spacecraft to land humans on the Moon. The firm received the contract on November 7, 1962, and built 13 lunar modules. Six of them successfully landed on
5151-532: The Moon, with one serving as a lifeboat on Apollo 13 , after an explosion crippled the main Apollo spacecraft. LM-2, a test article which never flew in space, is displayed permanently in the Smithsonian Institution . As the Apollo program neared its end, Grumman was one of the main competitors for the contract to design and build the Space Shuttle , but lost to Rockwell International . In 1969,
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#17327727632605252-479: The November election. He said he would reinstate overtime hours, roll back service reductions, and halt the removal of mail-sorting machines and collection boxes. However, 95 percent of the mail sorting machines that were planned for removal had already been removed, and according to House Speaker Nancy Pelosi , DeJoy said he has no intention of replacing them or the mail collection boxes. On December 27, 2020,
5353-620: The Post Office Department, during the Cold War, to redesign stamps to include more patriotic slogans. On March 18, 1970, postal workers in New York City—upset over low wages and poor working conditions, and emboldened by the Civil Rights Movement— organized a strike . The strike initially involved postal workers in only New York City, but it eventually gained support of over 210,000 postal workers across
5454-486: The Postal Accountability & Enhancement Act of 2006, the USPS would be forced to consider cutting delivery to five days per week during June, July, and August. H.R. 22, addressing this issue, passed the House of Representatives and Senate and was signed into law on September 30, 2009. However, Postmaster General Potter continued to advance plans to eliminate Saturday mail delivery. On June 10, 2009,
5555-645: The Postal Service announced its purchase of the Ford EVs as well as 14,000 electric vehicle charging stations. The fleet electrification plan is part of the Postal Service's initiative to reduce carbon emissions from fuel and electricity 40 percent and emissions from contracted services 20 percent by 2030. In August 2024, the USPS deployed the first new vehicles from its fleet modernization project at its Topeka Sorting and Delivery Center in Kansas, including: an electric vehicle with higher clearance for routes delivering
5656-557: The Postal Service contribution to the Civil Service Retirement System (CSRS). Most other employees that contribute to the CSRS have 7% deducted from their wages. Currently, all new employees contribute into Federal Employee Retirement System (FERS) once they become a full-time regular employees. Running low on cash, in order to continue operations unaffected and continue to meet payroll, the USPS defaulted for
5757-480: The Postal Service had $ 78.81 billion in revenue and expenses of $ 79.74 billion. Due to one-time appropriations authorized by the Postal Service Reform Act of 2022 , the agency reported a net income of $ 56.04 billion. In the 2023 fiscal, revenue had increased to $ 79.32 billion, but reported a net loss of $ 6.48 billion. In 2016, the USPS had its fifth straight annual operating loss, in
5858-533: The Postal Service to offer some non-mail services. As of 2023, the Postal Service operates 33,641 Post Office and contract locations in the U.S., and delivered a total of 127.3 billion packages and pieces of mail to 164.9 million delivery points in fiscal year 2022. USPS delivers mail and packages Monday through Saturday as required by the Postal Service Reform Act of 2022 ; on Sundays only Priority Express and packages for Amazon.com are delivered. The USPS delivers packages on Sundays in most major cities. During
5959-577: The Treasury to the post office. According to The Washington Post , officials under Treasury Secretary Steven Mnuchin suggested using the loan as leverage to give the Treasury Department more influence on USPS operations, including making them raise their charges for package deliveries, a change long sought by President Trump. In May 2020, in a controversial move, the Board of Governors of
6060-486: The U.S. Postal Service, and took effect on July 1, 1971. Among the changes from the Postal Reorganization Act, a key aspect was the requirement for the USPS to be self-financing, which introduced a conflict with its other requirement to provide a nationwide service. The next major legislation affecting the service, the Postal Accountability and Enhancement Act, was passed in 2006. This act limited
6161-956: The US, known as the United States Post Office was founded by the Second Continental Congress in Philadelphia on July 26, 1775, at the beginning of the American Revolution . Benjamin Franklin was appointed the first postmaster general ; he also served a similar position for the American colonies. The Post Office Department was created in 1792 with the passage of the Postal Service Act . The appointment of local postmasters
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#17327727632606262-586: The USPS announced that in order to save about $ 2 billion per year, Saturday delivery service would be discontinued except for packages, mail-order medicines, Priority Mail, Express Mail, and mail delivered to Post Office boxes, beginning August 10, 2013. However, the Consolidated and Further Continuing Appropriations Act, 2013 , passed in March, reversed the cuts to Saturday delivery. The Postal Accountability and Enhancement Act of 2006 (PAEA) obligated
6363-402: The USPS operated 673 facilities. ) As of May 2012, the plan was to start the first round of consolidation in summer 2012, pause from September to December, and begin a second round in February 2014; 80% of first-class mail would still be delivered overnight through the end of 2013. New delivery standards were issued in January 2015, and the majority of single-piece (not presorted) first-class mail
6464-526: The USPS to fund the present value of earned retirement obligations (essentially past promises which have not yet come due) within a ten-year time span. The U.S. Office of Personnel Management (OPM) is the main bureaucratic organization responsible for the human resources aspect of many federal agencies and their employees. The PAEA created the Postal Service Retiree Health Benefit Fund (PSRHB) after Congress removed
6565-496: The United States Postal Service appointed Louis DeJoy , the first postmaster general in the last two decades who did not emerge from the postal bureaucracy. Instead he had three decades of experience in the private delivery sector where he created a new national corporation with 80,000 employees. DeJoy—until 2014 CEO of New Breed Logistics (a controversial Postal Service contractor), and until 2018
6666-470: The aircraft's weight. There are two ways to produce dynamic upthrust — aerodynamic lift by having air flowing past an aerofoil (such dynamic interaction of aerofoils with air is the origin of the term "aerodyne"), or powered lift in the form of reactional lift from downward engine thrust . Aerodynamic lift involving wings is the most common, and can be achieved via two methods. Fixed-wing aircraft ( airplanes and gliders ) achieve airflow past
6767-494: The amount of $ 5.6 billion, of which $ 5.8 billion was the accrual of unpaid mandatory retiree health payments. First-class mail volume peaked in 2001 to 103.65 billion declining to 52.62 billion by 2020 due to the increasing use of email and the World Wide Web for correspondence and business transactions. Private courier services, such as FedEx and United Parcel Service (UPS), directly compete with USPS for
6868-501: The autogyro moves forward, air blows upward across the rotor, making it spin. This spinning increases the speed of airflow over the rotor, to provide lift. Rotor kites are unpowered autogyros, which are towed to give them forward speed or tethered to a static anchor in high-wind for kited flight. Compound rotorcraft have wings that provide some or all of the lift in forward flight. They are nowadays classified as powered lift types and not as rotorcraft. Tiltrotor aircraft (such as
6969-637: The company changed its name to Grumman Aerospace Corporation , and in 1978 it sold the Grumman-American Division to Gulfstream Aerospace . That same year, it acquired the bus manufacturer Flxible . The company built the Grumman LLV (Long Life Vehicle), a light transport mail truck designed for and used by the United States Postal Service . The LLV was produced from 1987 until 1994. Its intended service life
7070-485: The cost of postage increased to 73 cents for first class mail. Comprehensive reform packages considered in the 113th Congress include S.1486 and H.R.2748. These include the efficiency measure, supported by Postmaster General Patrick Donahoe of ending door-to-door delivery of mail for some or most of the 35 million addresses that currently receive it, replacing that with either curbside boxes or nearby "cluster boxes". This would save $ 4.5 billion per year out of
7171-461: The delivery of packages. Lower volume means lower revenues to support the fixed commitment to deliver to every address once a day, six days a week. According to an official report on November 15, 2012, the U.S. Postal Service lost $ 15.9 billion its 2012 fiscal year. In response, the USPS has increased productivity each year from 2000 to 2007, through increased automation, route re-optimization, and facility consolidation. Despite these efforts,
7272-435: The design process is regulated by national airworthiness authorities. The key parts of an aircraft are generally divided into three categories: The approach to structural design varies widely between different types of aircraft. Some, such as paragliders, comprise only flexible materials that act in tension and rely on aerodynamic pressure to hold their shape. A balloon similarly relies on internal gas pressure, but may have
7373-410: The easiest access to roadside mailboxes. Some rural letter carriers use personal vehicles. All contractors use personal vehicles. Standard postal-owned vehicles do not have license plates . These vehicles are identified by a seven-digit number displayed on the front and rear. Starting in 2026, all delivery truck purchases are scheduled to be electric vehicles , partly in response to criticism from
7474-477: The first manned ascent — and safe descent — in modern times took place by larger hot-air balloons developed in the 18th century. Each of the two World Wars led to great technical advances. Consequently, the history of aircraft can be divided into five eras: Lighter-than-air aircraft or aerostats use buoyancy to float in the air in much the same way that ships float on the water. They are characterized by one or more large cells or canopies, filled with
7575-412: The first time on a $ 5.5 billion retirement benefits payment due August 1, 2012, and a $ 5.6 billion payment due September 30, 2012. On September 30, 2014, the USPS failed to make a $ 5.7 billion payment on this debt, the fourth such default. In 2017, the USPS defaulted on some of the last lump-sum payments required by the 2006 law, though other payments were also still required. Proposals to cancel
7676-532: The first true manned, controlled flight in 1853. The first powered and controllable fixed-wing aircraft (the airplane or aeroplane) was invented by Wilbur and Orville Wright . Besides the method of propulsion (if any), fixed-wing aircraft are in general characterized by their wing configuration . The most important wing characteristics are: A variable geometry aircraft can change its wing configuration during flight. A flying wing has no fuselage, though it may have small blisters or pods. The opposite of this
7777-401: The four weeks preceding Christmas since 2013, packages from all mail classes and senders were delivered on Sunday in some areas. Parcels are also delivered on holidays, with the exception of Thanksgiving and Christmas. The USPS started delivering Priority Mail Express packages on Christmas Day in select locations for an additional fee. The holiday season between Thanksgiving and Christmas
7878-595: The funding obligation and debt from the defaults. Legislation was introduced in Congress in 2016 as well as in 2019, aiming to remove the benefits funding obligations, however no new legislation was passed until the 2022 Postal Service Reform Act (PSRA). The PSRA was signed into law in April 2022. It forgave $ 57 billion in Postal Service debt and released it from the obligation to set aside funds for future retirees' healthcare, as well as adding requirements for delivery timing and reporting on performance metrics, and allowing
7979-418: The funding obligation and plan a new schedule for the debt were introduced in Congress as early as 2016. A 2019 bill entitled the "USPS Fairness Act", which would have eliminated the pension funding obligation, passed the House but did not proceed further. As of March 8, 2022, the Postal Service Reform Act of 2022 , which includes a section entitled "USPS Fairness Act" cancelling the obligation, has passed both
8080-418: The fuselage or wings. On a fixed-wing aircraft the wings are rigidly attached to the fuselage, while on a rotorcraft the wings are attached to a rotating vertical shaft. Smaller designs sometimes use flexible materials for part or all of the structure, held in place either by a rigid frame or by air pressure. The fixed parts of the structure comprise the airframe . The source of motive power for an aircraft
8181-514: The gas bags, were produced, the Zeppelins being the largest and most famous. There were still no fixed-wing aircraft or non-rigid balloons large enough to be called airships, so "airship" came to be synonymous with these aircraft. Then several accidents, such as the Hindenburg disaster in 1937, led to the demise of these airships. Nowadays a "balloon" is an unpowered aerostat and an "airship"
8282-441: The initial 50,000 vehicles will be electric, as will all vehicles purchased after 2026. The number of gallons of fuel used in 2009 was 444 million, at a cost of US$ 1.1 billion . For every penny increase in the national average price of gasoline, the USPS spends an extra US$ 8 million per year to fuel its fleet. The fleet is notable in that many of its vehicles are right-hand drive , an arrangement intended to give drivers
8383-498: The nation. While the strike ended without any concessions from the federal government, it did ultimately allow for postal worker unions and the government to negotiate a contract which gave the unions most of what they wanted, as well as the signing of the Postal Reorganization Act by President Richard Nixon on August 12, 1970. The act replaced the cabinet-level Post Office Department with a new federal agency,
8484-410: The organization saw an $ 8.5 billion budget shortfall in 2010, and was losing money at a rate of about $ 3 billion per quarter in 2011. On December 5, 2011, the USPS announced it would close more than half of its mail processing centers, eliminate 28,000 jobs and reduce overnight delivery of First-Class Mail. This will close down 252 of its 461 processing centers. (At peak mail volume in 2006,
8585-620: The post office to facilitate the predicted flood of mail ballots, but the bill never reached the Senate floor for a vote. A March 2021 report from the Postal Service's inspector general found that the vast majority of mail-in ballots and registration materials in the 2020 election were delivered to the relevant authorities on time. The Postal Service handled approximately 135 million pieces of election-related mail between September 1 and November 3, delivering 97.9% of ballots from voters to election officials within three days, and 99.89% of ballots within seven days. Postmaster General DeJoy helped
8686-402: The recent changes. On August 16 the House of Representatives was called back from its summer recess to consider a bill rolling back all of the changes. On August 18, 2020, after days of heavy criticism and the day after lawsuits against the Postal Service and DeJoy personally were filed in federal court by several individuals, DeJoy announced that he would roll back all the changes until after
8787-411: The rotor forward, the downward flow is tilted backward, producing thrust for forward flight. Some helicopters have more than one rotor and a few have rotors turned by gas jets at the tips. Some have a tail rotor to counteract the rotation of the main rotor, and to aid directional control. Autogyros have unpowered rotors, with a separate power plant to provide thrust. The rotor is tilted backward. As
8888-436: The second type of aircraft to fly, the first being kites , which were also first invented in ancient China over two thousand years ago (see Han Dynasty ). A balloon was originally any aerostat, while the term airship was used for large, powered aircraft designs — usually fixed-wing. In 1919, Frederick Handley Page was reported as referring to "ships of the air," with smaller passenger types as "Air yachts." In
8989-430: The services that the Postal Service could offer to only those it already provided and also established a requirement for the USPS to save money for the medical benefits of future retirees. The Act set a goal to save $ 5 billion per year for the first 10 years of a 50-year schedule, however within 6 years the Postal Service began to default on its payments. The Postal Service experienced lower revenues as mail use declined in
9090-484: The testing and final assembly at the 6,000-acre (24 km) Naval Weapons Station in Calverton, New York , all located on Long Island. At its peak in 1986 it employed 23,000 people on Long Island and occupied 6,000,000 square feet (560,000 m) in structures on 105 acres (0.42 km) it leased from the U.S. Navy in Bethpage. The end of the Cold War at the beginning of the 1990s reduced defense spending and led to
9191-530: The tether or kite line ; they rely on virtual or real wind blowing over and under them to generate lift and drag. Kytoons are balloon-kite hybrids that are shaped and tethered to obtain kiting deflections, and can be lighter-than-air, neutrally buoyant, or heavier-than-air. Powered aircraft have one or more onboard sources of mechanical power, typically aircraft engines although rubber and manpower have also been used. Most aircraft engines are either lightweight reciprocating engines or gas turbines . Engine fuel
9292-733: The value of wartime production contracts. Grumman's first jet aircraft was the F9F Panther ; it was followed by the upgraded F9F/F-9 Cougar , and the F-11 Tiger in the 1950s. The company's big postwar successes came in the 1960s with the A-6 Intruder and E-2 Hawkeye and in the 1970s with the Grumman EA-6B Prowler and F-14 Tomcat . Grumman products were prominent in several feature movies including The Final Countdown in 1980, Top Gun in 1986, and Flight of
9393-460: The wind, though normally the pilot can control the altitude, either by heating the air or by releasing ballast, giving some directional control (since the wind direction changes with altitude). A wing-shaped hybrid balloon can glide directionally when rising or falling; but a spherically shaped balloon does not have such directional control. Kites are aircraft that are tethered to the ground or other object (fixed or mobile) that maintains tension in
9494-431: The wing. A flexible wing is a wing made of fabric or thin sheet material, often stretched over a rigid frame, similar to the flight membranes on many flying and gliding animals . A kite is tethered to the ground and relies on the speed of the wind over its wings, which may be flexible or rigid, fixed, or rotary. With powered lift, the aircraft directs its engine thrust vertically downward. V/STOL aircraft, such as
9595-402: The wings by having the entire aircraft moving forward through the air, while rotorcraft ( helicopters and autogyros ) do so by having mobile, elongated wings spinning rapidly around a mast in an assembly known as the rotor . As aerofoils, there must be air flowing over the wing to create pressure difference between above and below, thus generating upward lift over the entire wetted area of
9696-627: Was 24 years, but some of them were still in service in 2020. In 1983, Grumman sold Flxible for $ 40 million to General Automotive Corporation of Ann Arbor. In the 1950s, Grumman began production of Gulfstream business aircraft, starting with the Gulfstream I turboprop (Grumman model G-159) and the Gulfstream II jet (Grumman model G-1159). Gulfstream aircraft were operated by many companies, private individuals, and government agencies including various military entities and NASA . In addition,
9797-684: Was a community preference for a different option. In a survey of rural customers, 54% preferred the new plan of retaining rural post offices with reduced hours, 20% preferred the "Village Post Office" replacement (where a nearby private retail store would provide basic mail services with expanded hours), 15% preferred merger with another Post Office, and 11% preferred expanded rural delivery services. In 2012, USPS reported that approximately 40% of postal revenue comes from online purchases or private retail partners including Walmart , Staples , Office Depot , Walgreens , Sam's Club , Costco , and grocery stores. The National Labor Relations Board agreed to hear
9898-605: Was a major venue for delivering patronage jobs to the party that controlled the White House. Newspaper editors often were named. It was elevated to a cabinet-level department in 1872, and was transformed by the Postal Reorganization Act of 1970 into the U.S. Postal Service as an independent agency. Since the early 1980s, many direct tax subsidies to the USPS (with the exception of subsidies for costs associated with disabled and overseas voters) have been reduced or eliminated. The United States Information Agency (USIA) helped
9999-675: Was of the NASA X-43 A Pegasus , a scramjet -powered, hypersonic , lifting body experimental research aircraft, at Mach 9.68 or 6,755 mph (10,870 km/h) on 16 November 2004. Prior to the X-43A, the fastest recorded powered airplane flight, and still the record for the fastest manned powered airplane, was the North American X-15 , rocket-powered airplane at Mach 6.7 or 7,274 km/h (4,520 mph) on 3 October 1967. The fastest manned, air-breathing powered airplane
10100-490: Was used for virtually all fixed-wing aircraft until World War II and is still used in many smaller aircraft. Some types use turbine engines to drive a propeller in the form of a turboprop or propfan . Human-powered flight has been achieved, but has not become a practical means of transport. Unmanned aircraft and models have also used power sources such as electric motors and rubber bands. Jet aircraft use airbreathing jet engines , which take in air, burn fuel with it in
10201-439: Was widely adopted for tethered balloons ; in windy weather, this both reduces the strain on the tether and stabilizes the balloon. The nickname blimp was adopted along with the shape. In modern times, any small dirigible or airship is called a blimp, though a blimp may be unpowered as well as powered. Heavier-than-air aircraft or aerodynes are denser than air and thus must find some way to obtain enough lift that can overcome
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