142-622: The Boeing Everett Factory , officially the Everett Production Facility , is an airplane assembly facility operated by Boeing in Everett, Washington , United States. It sits on the north side of Paine Field and includes the largest building in the world by volume at over 472 million cubic feet (13,400,000 m), which covers 98.3 acres (39.8 ha). The entire complex covers approximately 1,000 acres (400 ha) and spans both sides of State Route 526 (named
284-592: A Consolidated B-24 Liberator , part of the United States Navy 's contribution ("Project Anvil"), en route for Heligoland piloted by Lieutenant Joseph P. Kennedy Jr. (future U.S. president John F. Kennedy 's elder brother) exploded over the Blyth estuary . Blast damage was caused over a radius of 5 miles (8.0 km). Naval flights stopped but a few more missions were flown by the USAAF. The Aphrodite project
426-585: A 20% increase in aircraft weight. The B-17's turbocharged Wright R-1820 Cyclone 9 engines were upgraded to increasingly more powerful versions of the same powerplants throughout its production, and similarly, the number of machine gun emplacement locations was increased. The B-17F variant was the primary version used by the Eighth Air Force to face the Germans in 1943, and standardized the manned Sperry ball turret for ventral defense, also replacing
568-690: A USAAC competition, Boeing's prototype Model 299/XB-17 outperformed two other entries but crashed, losing the initial 200-bomber contract to the Douglas B-18 Bolo . Still, the Air Corps ordered 13 more B-17s for further evaluation, which were introduced into service in 1938. The B-17 evolved through numerous design advances but from its inception, the USAAC (from 1941 the United States Army Air Forces , USAAF) promoted
710-716: A base was constructed on the western edge of Paine Field's runway. Opening in October 2013, the 17-acre (69,000 m) base, called the Dreamlifter Operations Center, was funded by Snohomish County with $ 35 million in bonds; it is owned by the county via the airport, with Boeing originally leasing the site and servicing the bonds. Following Boeing's decision to shutter the 787 production line in Everett and consolidate 787 production in South Carolina,
852-399: A basic plane and must then be completed by the builder. Few companies produce planes on a large scale. However, the production of a plane for one company is a process that actually involves dozens, or even hundreds, of other companies and plants, that produce the parts that go into the plane. For example, one company can be responsible for the production of the landing gear, while another one
994-523: A combustion chamber or a solid fuel with oxidizer may burn in the fuel chamber. Whether liquid or solid-fueled, the hot gas is accelerated through a nozzle. In World War II , the Germans deployed the Me 163 Komet rocket-powered aircraft . The first plane to break the sound barrier in level flight was a rocket plane – the Bell X-1 in 1948. The North American X-15 broke many speed and altitude records in
1136-781: A first flight. The flight tests continue until the aircraft has fulfilled all the requirements. Then, the governing public agency of aviation of the country authorizes the company to begin production. In the United States, this agency is the Federal Aviation Administration (FAA). In the European Union, European Aviation Safety Agency (EASA); in the United Kingdom it is the Civil Aviation Authority (CAA). In Canada,
1278-468: A form of roll control supplied either by wing warping or by ailerons and controlled by its pilot with a joystick and rudder bar. It was an important predecessor of his later Blériot XI Channel -crossing aircraft of the summer of 1909. World War I served as a testbed for the use of the airplane as a weapon. Airplanes demonstrated their potential as mobile observation platforms, then proved themselves to be machines of war capable of causing casualties to
1420-412: A frame and made rigid by the lift forces exerted by the airflow over them. Larger aircraft have rigid wing surfaces which provide additional strength. Whether flexible or rigid, most wings have a strong frame to give them their shape and to transfer lift from the wing surface to the rest of the aircraft. The main structural elements are one or more spars running from root to tip, and many ribs running from
1562-518: A further five squadrons of Spitfire Vs to cover the withdrawal) on the first USAAF heavy bomber raid over Europe, against the large railroad marshalling yards at Rouen -Sotteville in France, while a further six aircraft flew a diversionary raid along the French coast. The operation, carried out in good visibility, was a success, with only minor damage to one aircraft, unrelated to enemy action, and half
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#17327868800271704-414: A jet-powered aircraft with a speed of Mach 9.7, nearly 12,100 kilometers per hour (7,500 mph). Whereas jet aircraft use the atmosphere both as a source of oxidant and of mass to accelerate reactively behind the aircraft, rocket aircraft carry the oxidizer on board and accelerate the burned fuel and oxidizer backwards as the sole source of mass for reaction. Liquid fuel and oxidizer may be pumped into
1846-564: A legal loophole, the Air Corps ordered 13 YB-17s (designated Y1B-17 after November 1936 to denote its special F-1 funding) for service testing. The YB-17 incorporated a number of significant changes from the Model 299, including more powerful Wright R-1820 -39 Cyclone engines. Although the prototype was company-owned and never received a military serial (the B-17 designation itself did not appear officially until January 1936, nearly three months after
1988-530: A long span from side to side but have a short chord (high aspect ratio ). But to be structurally efficient, and hence light weight, a wing must have a short span but still enough area to provide lift (low aspect ratio). Boeing B-17 Flying Fortress The Boeing B-17 Flying Fortress is an American four-engined heavy bomber aircraft developed in the 1930s for the United States Army Air Corps (USAAC). A fast and high-flying bomber,
2130-485: A number of B-17Gs were also converted for search-and-rescue duties, later to be redesignated B-17H. Late in World War ;II, at least 25 B-17s were fitted with radio controls and television cameras, loaded with 20,000 lb (9,100 kg) of high explosives and designated BQ-7 "Aphrodite missiles" for Operation Aphrodite against bombing-resistant German bunkers. The operation, which involved remotely flying
2272-551: A presence in all the major battles of World War II . The first jet aircraft was the German Heinkel He 178 in 1939. The first jet airliner , the de Havilland Comet , was introduced in 1952. The Boeing 707 , the first widely successful commercial jet, was in commercial service for more than 60 years, from 1958 to 2019. First attested in English in the late 19th century (prior to the first sustained powered flight),
2414-416: A propeller creates is determined, in part, by its disk area—the area through which the blades rotate. The limitation on blade speed is the speed of sound ; as when the blade tip exceeds the speed of sound, shock waves decrease propeller efficiency. The rpm required to generate a given tip speed is inversely proportional to the diameter of the propeller. The upper design speed limit for propeller-driven aircraft
2556-453: A range of over 7,285 nmi (13,492 km; 8,383 mi). These are the 777 variants currently in production as of 2024: The Boeing 737 MAX is a mid-size, narrow-body, twin-engine, jet airliner. Production of the aircraft was expected to begin in the second half of 2024. This will be the fourth production line for the Boeing 737 MAX and is intended allow for added production capacity beyond that of
2698-418: A rate of 1.5 inches (3.8 cm) per minute and are guided by 26 overhead cranes that move along 31 miles (50 km) of track. These cranes are suspended along the roof trusses, which are 300 to 350 feet (91 to 107 m) long and are supported by columns that are 90 feet (27 m) tall. A network of pedestrian and utilities tunnels span 2.33 miles (3.75 km) under the factory floor; employees also use
2840-477: A shaft through a reduction gearing to the propeller. The propelling nozzle provides a relatively small proportion of the thrust generated by a turboprop. An electric aircraft runs on electric motors with electricity coming from fuel cells , solar cells , ultracapacitors , power beaming , or batteries . Currently, flying electric aircraft are mostly experimental prototypes, including manned and unmanned aerial vehicles , but there are some production models on
2982-449: A shared fleet of 1,300 bicycles and tricycles to move around the factory floor. The main building is 114 feet (35 m) tall and has six hangar doors that are each 82 feet (25 m) tall and 300 to 350 feet (91 to 107 m) wide. The doors have a six-part mural that was recognized as the world's largest digital image in 2006 by Guinness World Records . The building has a central ventilation system but lacks air conditioning ; it
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#17327868800273124-426: A single wing plane, a biplane has two stacked one above the other, a tandem wing has two placed one behind the other. When the available engine power increased during the 1920s and 30s and bracing was no longer needed, the unbraced or cantilever monoplane became the most common form of powered type. The wing planform is the shape when seen from above. To be aerodynamically efficient, a wing should be straight with
3266-435: A small and simple engine for high-speed use, such as with missiles. Ramjets require forward motion before they can generate thrust and so are often used in conjunction with other forms of propulsion, or with an external means of achieving sufficient speed. The Lockheed D-21 was a Mach 3+ ramjet-powered reconnaissance drone that was launched from a parent aircraft . A ramjet uses the vehicle's forward motion to force air through
3408-468: A span of 14 m (46 ft). All-up weight was 300 kilograms (660 lb). On 9 October 1890, Ader attempted to fly the Éole . Aviation historians give credit to this effort as a powered take-off and uncontrolled hop of approximately 50 m (160 ft) at a height of approximately 200 mm (7.9 in). Ader's two subsequent machines were not documented to have achieved flight. The American Wright brothers 's flights in 1903 are recognized by
3550-668: A sufficient supply of modern heavy bombers, with the largest available long-range medium bombers in any numbers being the Vickers Wellington , which could carry 4,500 pounds (2,000 kg) of bombs. While the Short Stirling and Handley Page Halifax became its primary bombers by 1941, in early 1940, the RAF agreed with the U.S. Army Air Corps to acquire 20 B-17Cs, which were given the service name Fortress Mk.I. Their first operation, against Wilhelmshaven on 8 July 1941
3692-525: A test flight determining the rate of climb and service ceiling was planned. The command pilot was Major Ployer Peter Hill , Wright Field Material Division Chief of the Flying Branch, his first flight in the Model 299. Copilot was Lieutenant Donald Putt, while Boeing chief test pilot Leslie R. Tower was behind the pilots in an advisory role. Also on board were Wright Field test observer John Cutting and mechanic Mark Koegler. The plane stalled and spun into
3834-600: A top speed of at least 200 mph (320 km/h). They also desired, but did not require, a bomber with a range of 2,000 mi (3,200 km) and a speed of 250 mph (220 kn; 400 km/h). The competition for the air corps contract was to be decided by a "fly-off" between Boeing's design, the Douglas DB-1 , and the Martin Model 146 at Wilbur Wright Field in Dayton, Ohio . The prototype B-17, with
3976-461: A type of rotary aircraft engine, he did not create and fly a powered fixed-wing aircraft. The Frenchman Clement Ader constructed his first of three flying machines in 1886, the Éole . It was a bat-like design run by a lightweight steam engine of his own invention, with four cylinders developing 20 horsepower (15 kW ), driving a four-blade propeller . The engine weighed no more than 4 kilograms per kilowatt (6.6 lb/hp). The wings had
4118-468: A well-framed, 10 panel plexiglass nose, the B-17Bs were delivered in five small batches between July 1939 and March 1940. In July 1940, an order for 512 B-17s was issued, but at the time of the attack on Pearl Harbor , fewer than 200 were in service with the army. A total of 155 B-17s of all variants were delivered between 11 January 1937 and 30 November 1941, but production quickly accelerated, with
4260-486: Is Mach 0.6. Aircraft designed to go faster than that employ jet engines. Reciprocating engines in aircraft have three main variants, radial , in-line and flat or horizontally opposed engine . The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel and was commonly used for aircraft engines before gas turbine engines became predominant. An inline engine
4402-508: Is a fixed-wing aircraft that is propelled forward by thrust from a jet engine , propeller , or rocket engine . Airplanes come in a variety of sizes, shapes, and wing configurations . The broad spectrum of uses for airplanes includes recreation , transportation of goods and people, military , and research . Worldwide, commercial aviation transports more than four billion passengers annually on airliners and transports more than 200 billion tonne - kilometers of cargo annually, which
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4544-400: Is a large-size, wide-body, four-engine, jet airliner. The 747-8I, the last passenger variant in production, is capable of carrying 467 passengers in a typical three-class configuration, has a range of 8,000 nmi (9,200 mi; 15,000 km) and a cruising speed Mach 0.855 (570 mph, 918 km/h, 495 kn). The Boeing 747 was one of the first wide-body aircraft to be produced and
4686-434: Is a mid-size, wide-body, twin-engine jet airliner. The current passenger variants in production, are capable of carrying 242–290 passengers in a typical two-class configuration, have a range of 7,355–7,635 nmi (8,464–8,786 mi; 13,621–14,140 km) and a cruising speed of Mach 0.85 (562 mph, 902 km/h, 487 kn). Production of this plane began in 2006. In February 2011, Boeing announced that some 787 work
4828-418: Is a mid-size, wide-body, twin-engine, jet airliner. First introduced in 1979 to complement the larger 747, the aircraft was capable of carrying 218 passengers in a typical three-class configuration over a range of 5,990 nautical miles (6,890 mi; 11,090 km) and a cruising speed of Mach 0.80 (530 mph, 851 km/h, 470 kn). Production of passenger variants ended in 2017 after its successor,
4970-421: Is a reciprocating engine with banks of cylinders, one behind another, rather than rows of cylinders, with each bank having any number of cylinders, but rarely more than six, and may be water-cooled. A flat engine is an internal combustion engine with horizontally-opposed cylinders. A turboprop gas turbine engine consists of an intake, compressor, combustor, turbine, and a propelling nozzle, which provide power from
5112-545: Is instead cooled by opening the doors for outdoor air. The building is heated through residual warming from employees and equipment, including the 1 million overhead lights in the factory. An urban legend states that clouds used to form inside the main building due to its size prior to the installation of upgraded ventilation systems. Adjacent buildings include a composite wing manufacturing plant with 1.2 million square feet (110,000 m) of floor space; paint and seal buildings; and an auxiliary fuselage assembly plant for
5254-420: Is less than 1% of the world's cargo movement. Most airplanes are flown by a pilot on board the aircraft, but some are designed to be remotely or computer-controlled such as drones. The Wright brothers invented and flew the first airplane in 1903, recognized as "the first sustained and controlled heavier-than-air powered flight". They built on the works of George Cayley dating from 1799, when he set forth
5396-420: Is responsible for the radar. The production of such parts is not limited to the same city or country; in the case of large plane manufacturing companies, such parts can come from all over the world. The parts are sent to the main plant of the plane company, where the production line is located. In the case of large planes, production lines dedicated to the assembly of certain parts of the plane can exist, especially
5538-580: The Fédération Aéronautique Internationale (FAI), the standard-setting and record-keeping body for aeronautics , as "the first sustained and controlled heavier-than-air powered flight". By 1905, the Wright Flyer III was capable of fully controllable, stable flight for substantial periods. The Wright brothers credited Otto Lilienthal as a major inspiration for their decision to pursue manned flight. In 1906,
5680-451: The 787 Dreamliner , entered service in 2011. Freighter and military variants remain in limited production. These are the 767 variants currently in production as of 2023: The Boeing 777 is a large-size, wide-body, twin-engine, jet airliner. Production of this plane began in 1993. As of November 2023, the factory is being retooled to produce the 777X, the next-generation of the aircraft. The 777-9 provides seating for 426 passengers and
5822-509: The Boeing 777X . The north side of the factory complex is connected to the flight line at Paine Field via a taxiway that crosses over the Boeing Freeway west of Airport Road; airplanes are towed from the factory to flight line facilities at night to avoid disrupting traffic. The south side includes a set of three paint hangars, a delivery center with conference rooms , and parking spaces for airplanes. The flight line area connects to
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5964-560: The Boeing Renton Factory to meet demand. The line will replace the discontinued Boeing 787 line at the factory. In January 2024, the FAA announced it would not grant any production expansion of the 737 MAX until it was satisfied that more stringent quality assurance measures had been enacted, stemming from the in-flight loss of a plug door panel of a MAX 9 jet. No timeline has been given on when it may do so. The Boeing 747
6106-458: The Japanese battleship Haruna , which was later acknowledged as a near bomb miss on the heavy cruiser Ashigara . Nonetheless, this deed made him a celebrated war hero . Kelly's B-17C AAF S/N 40-2045 (19th BG / 30th BS) crashed about 6 mi (10 km) from Clark Field after he held the burning Fortress steady long enough for the surviving crew to bail out. Kelly was posthumously awarded
6248-455: The 11th-century English monk Eilmer of Malmesbury ; both experiments injured their pilots. Leonardo da Vinci researched the wing design of birds and designed a man-powered aircraft in his Codex on the Flight of Birds (1502), noting for the first time the distinction between the center of mass and the center of pressure of flying birds. In 1799, George Cayley set forth the concept of
6390-605: The 1920s and 30s, wings could be made heavy and strong enough that bracing was not needed any more. This type of unbraced wing is called a cantilever wing. The number and shape of the wings varies widely on different types. A given wing plane may be full-span or divided by a central fuselage into port (left) and starboard (right) wings. Occasionally, even more wings have been used, with the three-winged triplane achieving some fame in WWI. The four-winged quadruplane and other multiplane designs have had little success. A monoplane has
6532-462: The 1960s and pioneered engineering concepts for later aircraft and spacecraft. Military transport aircraft may employ rocket-assisted take offs for short-field situations. Otherwise, rocket aircraft include spaceplanes , like SpaceShipTwo , for travel beyond the Earth's atmosphere and sport aircraft developed for the short-lived Rocket Racing League . Most airplanes are constructed by companies with
6674-589: The 1980s; a dedicated tour building was constructed in 1984 and later replaced by the Future of Flight Aviation Center in 2005. The new center has a theater, exhibits, a Boeing Store gift shop, and café. As of 2020 over 150,000 people come each year to visit the factory. The Boeing factory tour was suspended from 2020 to 2023 due to the COVID-19 pandemic . Airplane An airplane ( North American English ) or aeroplane ( British English ), informally plane ,
6816-404: The 8th, had ordered the second Schweinfurt mission to be cancelled as the weather deteriorated, but the lead units had already entered hostile air space and continued with the mission. Most of the escorts turned back or missed the rendezvous, and as a result, 60 B-17s were destroyed. A third raid on Schweinfurt on 24 February 1944 highlighted what came to be known as " Big Week ", during which
6958-853: The American and British bomber commands were organized at the Casablanca Conference in January 1943. The resulting " Combined Bomber Offensive " weakened the Wehrmacht , destroyed German morale, and established air superiority through Operation Pointblank 's destruction of German fighter strength in preparation for a ground offensive. The USAAF bombers attacked by day, with British operations – chiefly against industrial cities – by night. Operation Pointblank opened with attacks on targets in Western Europe. General Ira C. Eaker and
7100-663: The Aphrodite drones onto their targets by accompanying CQ-17 "mothership" control aircraft, was approved on 26 June 1944, and assigned to the 388th Bombardment Group stationed at RAF Fersfield , a satellite of RAF Knettishall . The first four drones were sent to Mimoyecques (V-3 site), the Siracourt V-1 bunker , and the V-2 Blockhaus d'Éperlecques at Watten, and La Coupole at Wizernes on 4 August, causing little damage and two pilots were killed. On August 12,
7242-670: The B-17 once holding the record for the highest production rate for any large aircraft. The aircraft went on to serve in every World War II combat zone, and by the time production ended in May 1945, 12,731 B-17s had been built by Boeing, Douglas , and Vega (a subsidiary of Lockheed ). Though the crash of the prototype 299 in 1935 had almost wiped out Boeing, now it was seen as a boon. Instead of building models based on experimental engineering, Boeing had been hard at work developing their bomber and now had versions ready for production far better than would have been possible otherwise. One of
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#17327868800277384-526: The B-17 was used primarily in the European Theater of Operations and dropped more bombs than any other aircraft during World War II . It is the third-most produced bomber of all time, behind the American four-engined Consolidated B-24 Liberator and the German multirole, twin-engined Junkers Ju 88 . The B-17 was also employed in transport, anti-submarine warfare, and search and rescue roles. In
7526-466: The B-17 were designed defensively, the large-tailed B-17E was the first model primarily focused on offensive warfare. The B-17E was an extensive revision of the Model 299 design: The fuselage was extended by 10 ft (3.0 m); a much larger rear fuselage, vertical tailfin, rudder, and horizontal stabilizer were added; a gunner's position was added in the new tail ; the nose (especially the bombardier's framed, 10-panel nose glazing) remained relatively
7668-483: The B-17B was altered to include larger rudders and flaps . The B-17C changed from three bulged, oval-shaped gun blisters to two flush, oval-shaped gun window openings, and on the lower fuselage, a single "bathtub" gun gondola housing, which resembled the similarly configured and located Bodenlafette /"Bola" ventral defensive emplacement on the German Heinkel He 111 P-series medium bomber. While models A through D of
7810-609: The Big Week raids. By September 1944, 27 of the 42 bomb groups of the 8th Air Force and six of the 21 groups of the 15th Air Force used B-17s. Losses to flak continued to take a high toll of heavy bombers through 1944, but the war in Europe was being won by the Allies. And by 27 April 1945, 2 days after the last heavy bombing mission in Europe, the rate of aircraft loss was so low that replacement aircraft were no longer arriving and
7952-552: The Boeing Freeway). The factory was built in 1967 for the Boeing 747 and has since been expanded several times to accommodate new airliners, including the 767 , 777 , and 787 programs. More than 5,000 widebody aircraft have been built at the Everett factory since it opened. The Boeing Everett complex sits on 1,000 acres (400 ha) in southwestern Everett , about 22 miles (35 km) north of Seattle . It includes up to 200 separate buildings and facilities, mostly on
8094-428: The Boeing Freeway, covers 98.3 acres (398,000 m) and is organized into six production lines that are separated by walls, offices, and other spaces. It is the world's largest building by volume at 472,370,319 cubic feet (13,376,037.9 m) of interior space according to Guinness World Records ; the building is large enough to fit all of Disneyland or 75 American football fields . The production lines move at
8236-469: The Boeing factory designation of Model 299, was designed by a team of engineers led by E. Gifford Emery and Edward Curtis Wells , and was built at Boeing's own expense. It combined features of the company's experimental XB-15 bomber and 247 transport. The B-17's armament consisted of five .30 caliber (7.62 mm) machine guns , with a payload up to 4,800 lb (2,200 kg) of bombs on two racks in
8378-742: The Brazilian Alberto Santos-Dumont made what was claimed to be the first airplane flight unassisted by catapult and set the first world record recognized by the Aéro-Club de France by flying 220 meters (720 ft) in less than 22 seconds. This flight was also certified by the FAI. An early aircraft design that brought together the modern monoplane tractor configuration was the Blériot VIII design of 1908. It had movable tail surfaces controlling both yaw and pitch,
8520-622: The Concorde to remove it from service. An aircraft propeller , or airscrew , converts rotary motion from an engine or other power source, into a swirling slipstream which pushes the propeller forwards or backwards. It comprises a rotating power-driven hub, to which are attached two or more radial airfoil -section blades such that the whole assembly rotates about a longitudinal axis. Three types of aviation engines used to power propellers include reciprocating engines (or piston engines), gas turbines , and electric motors . The amount of thrust
8662-531: The Dreamlifter Operations Center to package courier FedEx in April 2021. FedEx, which takes over the lease on November 1, plans to use it for its cargo airline operations. The two 787 variants formerly produced in Everett were the 787-8 and the 787-9 . Following several months of unofficial visits, Boeing began offering factory tours with the first rollout of the 747 in 1968. The first year of tours had over 39,000 visitors, which later grew to 55,000 annually by
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#17327868800278804-577: The Eighth Air Force placed highest priority on attacks on the German aircraft industry, especially fighter assembly plants, engine factories, and ball-bearing manufacturers. Attacks began in April 1943 on heavily fortified key industrial plants in Bremen and Recklinghausen . Since the airfield bombings were not appreciably reducing German fighter strength, additional B-17 groups were formed, and Eaker ordered major missions deeper into Germany against important industrial targets. The 8th Air Force then targeted
8946-586: The FEAF received word of the attack on Pearl Harbor, General Lewis H. Brereton sent his bombers and fighters on various patrol missions to prevent them from being caught on the ground. Brereton planned B-17 raids on Japanese airfields in Formosa , in accordance with Rainbow 5 war plan directives, but this was overruled by General Douglas MacArthur. A series of disputed discussions and decisions , followed by several confusing and false reports of air attacks, delayed
9088-672: The Model 299. In one of their first missions, three B-17s, directed by lead navigator Lieutenant Curtis LeMay , were sent by General Andrews to "intercept" and photograph the Italian ocean liner Rex 610 miles (980 km) off the Atlantic coast. The mission was successful and widely publicized. The 13th Y1B-17 was delivered to the Material Division at Wright Field, Ohio, to be used for flight testing. A 14th Y1B-17 ( 37-369 ), originally constructed for ground testing of
9230-508: The RAF had lost eight B-17Cs in combat and had experienced numerous mechanical problems, and Bomber Command abandoned daylight bombing raids using the Fortress I because of the aircraft's poor performance. The experience showed both the RAF and USAAF that the B-17C was not ready for combat, and that improved defenses, larger bomb loads, and more accurate bombing methods were required. However,
9372-606: The Russian Alexander F. Mozhaisky also made some innovative designs. In 1883, the American John J. Montgomery made a controlled flight in a glider. Other aviators who made similar flights at that time were Otto Lilienthal , Percy Pilcher , and Octave Chanute . Sir Hiram Maxim built a craft that weighed 3.5 tons, with a 110-foot (34 m) wingspan that was powered by two 360-horsepower (270 kW) steam engines driving two propellers. In 1894, his machine
9514-405: The U.S. Navy was giving the flight a 21-gun salute to celebrate the arrival of the bombers, after which he realized that Pearl Harbor was under attack. The Fortress came under fire from Japanese fighter aircraft, though the crew was unharmed with the exception of one member who suffered an abrasion on his hand. Japanese activity forced them to divert from Hickam Field to Bellows Field . On landing,
9656-589: The USAAF continued using the B-17 as a day bomber, despite misgivings by the RAF that attempts at daylight bombing would be ineffective. As use by Bomber Command had been curtailed, the RAF transferred its remaining Fortress Mk.I aircraft to Coastal Command for use as a long-range maritime patrol aircraft. These were augmented starting in July 1942 by 45 Fortress Mk.IIA (B-17E) followed by 19 Fortress Mk II (B-17F) and three Fortress Mk III (B-17G). A Fortress IIA from No. 206 Squadron RAF sank U-627 on 27 October 1942,
9798-554: The United States, when one was destroyed in a fatal mid-air collision with another warbird at an airshow. On 8 August 1934, the USAAC tendered a proposal for a multiengine bomber to replace the Martin B-10 . The Air Corps was looking for a bomber capable of reinforcing the air forces in Hawaii, Panama, and Alaska. Requirements were for it to carry a "useful bombload" at an altitude of 10,000 ft (3,000 m) for 10 hours with
9940-590: The Wright engines normally used on the B-17 become unavailable. The only prototype XB-38 to fly crashed on its ninth flight, and the concept was abandoned. The Allison V-1710 was reallocated to fighter aircraft. The YB-40 was a heavily armed modification of the standard B-17 used before the North American P-51 Mustang , an effective long-range fighter, became available to act as escort. Additional armament included an additional dorsal turret in
10082-596: The Y1B-17. Also, the Y1B-17A's new service ceiling was more than 2 miles (3,200 m) higher at 38,000 feet (12,000 m), compared to the Y1B-17's 27,800 feet (8,500 m). These turbo-superchargers were incorporated into the B-17B. Opposition to the Air Corps' ambitions for the acquisition of more B-17s faded, and in late 1937, 10 more aircraft designated B-17B were ordered to equip two bombardment groups, one on each U.S. coast. Improved with larger flaps and rudder and
10224-485: The air entering the engine must be decelerated to a subsonic speed and then re-accelerated back to supersonic speeds after combustion. An afterburner may be used on combat aircraft to increase power for short periods of time by injecting fuel directly into the hot exhaust gases. Many jet aircraft also use thrust reversers to slow down after landing. A ramjet is a form of jet engine that contains no major moving parts and can be particularly useful in applications requiring
10366-462: The aircraft as a strategic weapon. It was a relatively fast, high-flying, long-range bomber with heavy defensive armament at the expense of bomb load. It also developed a reputation for toughness based upon stories and photos of badly damaged B-17s safely returning to base. The B-17 saw early action in the Pacific War , where it conducted air raids against Japanese shipping and airfields. But it
10508-616: The aircraft overran the runway and ran into a ditch, where it was then strafed. Although initially deemed repairable, 40-2049 (11th BG / 38th RS) received more than 200 bullet holes and never flew again. Ten of the 12 Fortresses survived the attack. By 1941, the Far East Air Force (FEAF) based at Clark Field in the Philippines had 35 B-17s, with the War Department eventually planning to raise that to 165. When
10650-478: The airframe's strength, was upgraded by Boeing with exhaust-driven General Electric turbo-superchargers , and designated Y1B-17A. Designed by Sanford Moss , engine exhaust gases turned the turbine's steel-alloy blades, forcing high-pressure air into the Wright Cyclone GR-1820-39 engine supercharger. Scheduled to fly in 1937, it encountered problems with the turbochargers, and its first flight
10792-479: The airport in preparation of the announcement and cleared parts of the site by late May. The 158-million-cubic-foot (4,500,000 m) factory, planned to become the world's largest building by volume, was built in sections beginning in late June. The first section housed a mockup of the Boeing 747 that had been under assembly at the Renton factory. A railroad spur connecting the site to the mainline tracks at Mukilteo
10934-417: The attack was successful at disrupting the entire works, severely curtailing work there for the remainder of the war, it was at an extreme cost. Of the 291 attacking Fortresses, 60 were shot down over Germany, five crashed on approach to Britain, and 12 more were scrapped due to damage – a loss of 77 B-17s. Additionally, 122 bombers were damaged and needed repairs before their next flights. Of 2,900 men in
11076-539: The authorization of the sortie. By the time the B-17s and escorting Curtiss P-40 Warhawk fighters were about to get airborne, they were destroyed by Japanese bombers of the 11th Air Fleet . The FEAF lost half its aircraft during the first strike, and was all but destroyed over the next few days. Another early World War II Pacific engagement, on 10 December 1941, involved Colin Kelly , who reportedly crashed his B-17 into
11218-591: The ball-bearing factories in Schweinfurt , hoping to cripple the war effort there. The first raid on 17 August 1943 did not result in critical damage to the factories, with the 230 attacking B-17s being intercepted by an estimated 300 Luftwaffe fighters. The Germans shot down 36 aircraft with the loss of 200 men, and coupled with a raid earlier in the day against Regensburg , a total of 60 B-17s were lost that day. A second attempt on Schweinfurt on 14 October 1943 later came to be known as " Black Thursday ". While
11360-437: The behavior of the aircraft. Computers are used by companies to draw, plan and do initial simulations of the aircraft. Small models and mockups of all or certain parts of the plane are then tested in wind tunnels to verify its aerodynamics. When the design has passed through these processes, the company constructs a limited number of prototypes for testing on the ground. Representatives from an aviation governing agency often make
11502-436: The bomb bay behind the cockpit. The aircraft was powered by four Pratt & Whitney R-1690 Hornet radial engines , each producing 750 hp (600 kW) at 7,000 ft (2,100 m). The first flight of the Model 299 was on 28 July 1935 with Boeing chief test pilot Leslie Tower at the controls. The day before, Richard Williams, a reporter for The Seattle Times , coined the name "Flying Fortress" when – observing
11644-456: The bombing missions were directed against German aircraft production. German fighters needed to respond, and the North American P-51 Mustang and Republic P-47 Thunderbolt fighters (equipped with improved drop tanks to extend their range) accompanying the American heavies all the way to and from the targets engaged them. The escort fighters reduced the loss rate to below 7%, with a total of 247 B-17s lost in 3,500 sorties while taking part in
11786-563: The bombs landing in the target area. Two additional groups arrived in Britain at the same time, bringing with them the first B-17Fs, which served as the primary AAF heavy bomber fighting the Germans until September 1943. As the raids of the American bombing campaign grew in numbers and frequency, German interception efforts grew in strength (such as during the attempted bombing of Kiel on 13 June 1943 ), such that unescorted bombing missions came to be discouraged. The two different strategies of
11928-857: The case of international sales, a license from the public agency of aviation or transport of the country where the aircraft is to be used is also necessary. For example, airplanes made by the European company, Airbus , need to be certified by the FAA to be flown in the United States, and airplanes made by U.S.-based Boeing need to be approved by the EASA to be flown in the European Union. Regulations have resulted in reduced noise from aircraft engines in response to increased noise pollution from growth in air traffic over urban areas near airports. Small planes can be designed and constructed by amateurs as homebuilts. Other homebuilt aircraft can be assembled using pre-manufactured kits of parts that can be assembled into
12070-426: The combustion air, prior to the introduction and ignition of fuel. Rocket motors provide thrust by burning a fuel with an oxidizer and expelling gas through a nozzle. Most jet aircraft use turbofan jet engines, which employ a gas turbine to drive a ducted fan, which accelerates air around the turbine to provide thrust in addition to that which is accelerated through the turbine. The ratio of air passing around
12212-445: The company announced that it had selected a site adjacent to Paine Field as the future home of its Boeing 747 assembly plant. Boeing purchased 780 acres (320 ha) north of the airport, which had primarily been used by the U.S. military and small businesses; a 75-year lease for use of Paine Field was also signed with the county government, which owned the airport. The company had already spent several months acquiring properties around
12354-484: The concept of the modern airplane (and later built and flew models and successful passenger-carrying gliders ) and the work of German pioneer of human aviation Otto Lilienthal , who, between 1867 and 1896, also studied heavier-than-air flight. Lilienthal's flight attempts in 1891 are seen as the beginning of human flight. Following its limited use in World War I , aircraft technology continued to develop. Airplanes had
12496-458: The concept of the modern wing, his flight attempts in 1891 are seen as the beginning of human flight, the " Lilienthal Normalsegelapparat " is considered to be the first airplane in series production and his work heavily inspired the Wright brothers. In the 1890s, Lawrence Hargrave conducted research on wing structures and developed a box kite that lifted the weight of a man. His box kite designs were widely adopted. Although he also developed
12638-413: The crews, about 650 did not return, although some survived as prisoners of war . Only 33 bombers landed without damage. These losses were a result of concentrated attacks by over 300 German fighters. Such high losses of aircrews could not be sustained, and the USAAF, recognizing the vulnerability of heavy bombers to interceptors when operating alone, suspended daylight bomber raids deep into Germany until
12780-524: The development of an escort fighter that could protect the bombers all the way from the United Kingdom to Germany and back. At the same time, the German nightfighting ability noticeably improved to counter the nighttime strikes, challenging the conventional faith in the cover of darkness. The 8th Air Force alone lost 176 bombers in October 1943, and was to suffer similar casualties on 11 January 1944 on missions to Oschersleben , Halberstadt , and Brunswick . Lieutenant General James Doolittle , commander of
12922-506: The earlier, 10-panel framed bombardier's nose glazing from the B subtype with an enlarged, nearly frameless Plexiglas bombardier's nose enclosure for improved forward vision. Two experimental versions of the B-17 were flown under different designations, the XB-38 'Flying Fortress' and the YB-40 'Flying Fortress .' The XB-38 was an engine testbed for Allison V-1710 liquid-cooled engines, should
13064-479: The end of WWII all-metal aircraft were common. In modern times, increasing use of composite materials has been made. Typical structural parts include: The wings of a fixed-wing aircraft are static planes extending either side of the aircraft. When the aircraft travels forwards, air flows over the wings, which are shaped to create lift. This shape is called an airfoil and is shaped like a bird's wing. Airplanes have flexible wing surfaces which are stretched across
13206-481: The enemy. The earliest known aerial victory with a synchronized machine gun-armed fighter aircraft occurred in 1915, by German Luftstreitkräfte Leutnant Kurt Wintgens . Fighter aces appeared; the greatest (by number of Aerial Combat victories) was Manfred von Richthofen , also known as the Red Baron. Following WWI, aircraft technology continued to develop. Alcock and Brown crossed the Atlantic non-stop for
13348-426: The engine without resorting to turbines or vanes. Fuel is added and ignited, which heats and expands the air to provide thrust. A scramjet is a specialized ramjet that uses internal supersonic airflow to compress, combine with fuel, combust and accelerate the exhaust to provide thrust. The engine operates at supersonic speeds only. The NASA X-43 , an experimental unmanned scramjet, set a world speed record in 2004 for
13490-497: The evaluation, thus disqualifying it from the competition. While the Air Corps was still enthusiastic about the aircraft's potential, Army officials were daunted by its cost; Douglas quoted a unit price of $ 58,200 (equivalent to $ 1,018,000 in 2023 ) based on a production order of 220 aircraft, compared with $ 99,620 (equivalent to $ 1,743,000 in 2023 ) from Boeing. MacArthur's successor, Army Chief of Staff Malin Craig , canceled
13632-535: The final moments before release. The USAAF began building up its air forces in Europe using B-17Es soon after entering the war. The first Eighth Air Force units arrived in High Wycombe, England , on 12 May 1942, to form the 97th Bomb Group. On 17 August 1942, 12 B-17Es of the 97th, with the lead aircraft piloted by Major Paul Tibbets and carrying Brigadier General Ira Eaker as an observer, were close escorted by four squadrons of RAF Spitfire IXs (and
13774-683: The first of 11 U-boat kills credited to RAF Fortress bombers during the war. As sufficient Consolidated Liberators finally became available, Coastal Command withdrew the Fortress from the Azores, transferring the type to the meteorological reconnaissance role. Three squadrons undertook Met profiles from airfields in Iceland, Scotland, and England, gathering data for vital weather forecasting purposes. The RAF's No. 223 Squadron , as part of 100 Group , operated several Fortresses equipped with an electronic warfare system known as " Airborne Cigar " (ABC). This
13916-513: The first time in 1919. The first international commercial flights took place between the United States and Canada in 1919. Airplanes had a presence in all the major battles of World War II . They were an essential component of the military strategies of the period, such as the German Blitzkrieg , The Battle of Britain , and the American and Japanese aircraft carrier campaigns of the Pacific War . The first practical jet aircraft
14058-468: The ground soon after takeoff, bursting into flames. Though initially surviving the impact, Hill died within a few hours, and Tower on 19 November. Post-accident interviews with Tower and Putt determined the control surface gust lock had not been released. Doyle notes, "The loss of Hill and Tower, and the Model 299, was directly responsible for the creation of the modern written checklist used by pilots to this day." The crashed Model 299 could not finish
14200-519: The gun stations were finalized, and other adjustments were completed. The B-17G was the final version of the Flying Fortress, incorporating all changes made to its predecessor, the B-17F, and in total, 8,680 were built, the last (by Lockheed) on 28 July 1945. Many B-17Gs were converted for other missions such as cargo hauling, engine testing, and reconnaissance . Initially designated SB-17G,
14342-410: The head of GHQ Air Force. MacArthur and Andrews both believed that the capabilities of large four-engined aircraft exceeded those of shorter-ranged, twin-engine aircraft, and that the B-17 was better suited to new, emerging USAAC doctrine. Their opinions were shared by the air corps procurement officers, and even before the competition had finished, they suggested buying 65 B-17s. On 30 October 1935,
14484-418: The large number of machine guns sticking out from the new aircraft – he described it as a "15-ton flying fortress" in a picture caption. The most distinctive mount was in the nose, which allowed the single machine gun to be fired toward nearly all frontal angles. Boeing was quick to see the value of the name and had it trademarked for use. Boeing also claimed in some of the early press releases that Model 299
14626-399: The leading (front) to the trailing (rear) edge. Early airplane engines had little power, and lightness was very important. Also, early airfoil sections were very thin, and could not have a strong frame installed within. So, until the 1930s, most wings were too lightweight to have enough strength, and external bracing struts and wires were added. When the available engine power increased during
14768-428: The lease on the Dreamlifter Operations Center was transferred to FedEx for use as a cargo base. Several workers at the Everett facility tested positive for COVID-19 in early March 2020, prior to a full shutdown of operations. The factory was shut down for three weeks until workers were able to return with mandatory face masks, social distancing , and staggered start times to reduce potential exposure. The Boeing 767
14910-457: The lighter bombers once they had dropped their bombs, so the project was abandoned and finally phased out in July 1943. The final production blocks of the B-17F from Douglas' plants did, however, adopt the YB-40's "chin turret", giving them a much-improved forward defense capability. By the time the definitive B-17G appeared, the number of guns had been increased from seven to 13, the designs of
15052-465: The main runway at Paine Field, which is 9,010 feet (2,750 m) long and is the only one at the airport that can accommodate jetliners. The runway has also used for commercial service since the opening of a new passenger terminal at the airport in 2019. Additional spaces for parked airplanes are on the west side of the runway and southwest of the main building; Paine Field's short crosswind runway has also occasionally been used to park airplanes since 2010;
15194-422: The manufacturer or the customer. The structural parts of a fixed-wing aircraft are called the airframe. The parts present can vary according to the aircraft's type and purpose. Early types were usually made of wood with fabric wing surfaces, When engines became available for powered flight around a hundred years ago, their mounts were made of metal. Then as speeds increased more and more parts became metal until by
15336-440: The market. Jet aircraft are propelled by jet engines , which are used because the aerodynamic limitations of propellers do not apply to jet propulsion. These engines are much more powerful than a reciprocating engine for a given size or weight and are comparatively quiet and work well at higher altitude. Variants of the jet engine include the ramjet and the scramjet , which rely on high airspeed and intake geometry to compress
15478-406: The modern airplane as a fixed-wing flying machine with separate systems for lift, propulsion, and control. Cayley was building and flying models of fixed-wing aircraft as early as 1803, and he built a successful passenger-carrying glider in 1853. In 1856, Frenchman Jean-Marie Le Bris made the first powered flight, by having his glider "L'Albatros artificiel" pulled by a horse on a beach. Then
15620-442: The most significant weapons of World War II would be ready, but only by a hair. The aircraft went through several alterations in each of its design stages and variants. Of the 13 YB-17s ordered for service testing, 12 were used by the 2nd Bomb Group at Langley Field, Virginia, to develop heavy bombing techniques, and the 13th was used for flight testing at the Material Division at Wright Field, Ohio. Experiments on this aircraft led to
15762-500: The north and east sides of Paine Field 's main runway, and straddles both sides of State Route 526 (named the Boeing Freeway). The complex includes a fire station , a medical clinic, a gymnasium, on-site security, and seven restaurants and cafes. As of 2022, Boeing has 30,000 workers at its Everett site who are scheduled in three shifts , primarily during daytime hours. The company is the largest employer in Everett and Snohomish County . The main assembly building, immediately north of
15904-526: The number of bombers per bomb group was reduced. The Combined Bomber Offensive was effectively complete. On 7 December 1941, a group of 12 B-17s of the 38th (four B-17C) and 88th (eight B-17E) Reconnaissance Squadrons, en route to reinforce the Philippines, was flown into Pearl Harbor from Hamilton Field, California , arriving while the surprise attack on Pearl Harbor was going on. Leonard "Smitty" Smith Humiston, co-pilot on First Lieutenant Robert H. Richards' B-17C, AAF S/N 40-2049 , reported that he thought
16046-405: The objective of producing them in quantity for customers. The design and planning process, including safety tests, can last up to four years for small turboprops or longer for larger planes. During this process, the objectives and design specifications of the aircraft are established. First the construction company uses drawings and equations, simulations, wind tunnel tests and experience to predict
16188-459: The order for 65 YB-17s and ordered 133 of the twin-engined Douglas B-18 Bolo, instead. Secretary of War Harry Hines Woodring in October 1938 decided that no four-engine bombers, including B-17s, would be purchased by the War Department in 1939. The loss was not total... But Boeing's hopes for a substantial bomber contract were dashed. Despite the crash, the USAAC had been impressed by the prototype's performance, and on 17 January 1936, through
16330-557: The prototype crashed), the term "XB-17" was retroactively applied to the NX13372's airframe and has entered the lexicon to describe the first Flying Fortress. Between 1 March and 4 August 1937, 12 of the 13 Y1B-17s were delivered to the 2nd Bombardment Group at Langley Field in Virginia for operational development and flight tests. One suggestion adopted was the use of a preflight checklist to avoid accidents such as that which befell
16472-586: The public agency in charge and authorizing the mass production of aircraft is Transport Canada's Civil Aviation Authority. When a part or component needs to be joined together by welding for virtually any aerospace or defense application, it must meet the most stringent and specific safety regulations and standards. Nadcap , or the National Aerospace and Defense Contractors Accreditation Program sets global requirements for quality, quality management and quality assurance for aerospace engineering. In
16614-419: The radio room, a remotely operated and fired Bendix-built "chin turret" directly below the bombardier's accommodation, and twin 50 caliber (12.7 mm) guns in each of the waist positions. The ammunition load was over 11,000 rounds. All of these modifications made the YB-40 well over 10,000 lb (4,500 kg) heavier than a fully loaded B-17F. The YB-40s with their greater weight, had trouble keeping up with
16756-489: The runway and an adjacent taxiway have been leased by Boeing from the county government to store airplanes. Boeing opened its first facilities in Everett on October 13, 1943, at a former auto garage to produce sections for the Boeing B-17 Flying Fortress . The company had several small shops in the city, but their presence in the area was reduced by 1963. The first 25 orders for the Boeing 747 , to be
16898-410: The same as the earlier B through D versions had; a Sperry electrically powered manned dorsal gun turret just behind the cockpit was added; a similarly powered (also built by Sperry) manned ventral ball turret just aft of the bomb bay – replaced the relatively hard-to-use, Sperry model 645705-D remotely operated ventral turret on the earliest examples of the E variant. These modifications resulted in
17040-533: The start of 2024, six aircraft remain in flying condition. About 50 survive in storage or are on static display, the oldest of which is The Swoose , a B-17D which was flown in combat in the Pacific on the first day of the United States' involvement in World War II. There are also several reasonably complete wrecks, such as underwater, that have been found. B-17 survivors gained national attention in 2022 in
17182-619: The term "airplane" is used for powered fixed-wing aircraft. In the United Kingdom and Ireland and most of the Commonwealth , the term "aeroplane" ( / ˈ ɛər ə p l eɪ n / ) is usually applied to these aircraft. Many stories from antiquity involve flight, such as the Greek legend of Icarus and Daedalus , and the Vimana in ancient Indian epics . Around 400 BC in Greece , Archytas
17324-402: The then-secret Norden bombsight , known as the "Blue Ox", which was an optical electromechanical gyrostabilized analog computer . The device was able to determine, from variables put in by the bombardier, the point at which the bombs should be released to hit the target. The bombardier essentially took over flight control of the aircraft during the bomb run, maintaining a level altitude during
17466-408: The turbine to that passing through is called the by-pass ratio . They represent a compromise between turbojet (with no bypass) and turboprop forms of aircraft propulsion (primarily powered with bypass air). Subsonic aircraft, such as airliners, employ high by-pass jet engines for fuel efficiency. Supersonic aircraft , such as jet fighters, use low-bypass turbofans. However at supersonic speeds,
17608-462: The use of a quartet of General Electric turbo-superchargers, which later became standard on the B-17 line. A 14th aircraft, the YB-17A, originally destined for ground testing only and upgraded with the turbochargers, was redesignated B-17A after testing had finished. As the production line developed, Boeing engineers continued to improve upon the basic design. To enhance performance at slower speeds,
17750-537: The wake of the COVID-19 pandemic and its resulting impact on aviation , Boeing announced in July 2020 that it would consider consolidating all of its 787 assembly in a single location; the company chose to move all production to South Carolina on October 1, causing backlash from the Washington state government. The move was completed in February 2021; it was cemented with Boeing's agreement to transfer its lease of
17892-408: The wings and the fuselage. When complete, a plane is rigorously inspected to search for imperfections and defects. After approval by inspectors, the plane is put through a series of flight tests to assure that all systems are working correctly and that the plane handles properly. To meet a particular customer need, the airplane may be customised using components or packages of components provided by
18034-428: The word airplane , like aeroplane , derives from the French aéroplane , which comes from the Greek ἀήρ ( aēr ), "air" and either Latin planus , "level", or Greek πλάνος ( planos ), "wandering". " Aéroplane " originally referred just to the wing, as it is a plane moving through the air. In an example of synecdoche , the word for the wing came to refer to the entire aircraft. In the United States and Canada,
18176-585: The world's largest jetliner, were sold to Pan American World Airways for $ 525 million (equivalent to $ 4.9 billion in 2023) in March 1966. The program would require a larger factory than their Renton facility , which was instead planned to be used for the conceptual 2707 supersonic airliner . Among the sites considered by Boeing for a new factory were Monroe, Washington ; McChord Air Force Base near Tacoma, Washington ; Moses Lake, Washington ; Cleveland, Ohio ; and Walnut Creek, California . On June 17, 1966,
18318-575: Was being moved to a plant in North Charleston, South Carolina in order to relieve overcrowding of 787s at Everett caused by large volumes of 787 orders. In July 2014, Boeing announced that the 787-10 variant, the longest variant of the 787, would be produced exclusively in South Carolina as the fuselage pieces for that variant are too large for the Dreamlifter to fit for transport to Everett. Undertaking drastic cost-cutting measures in
18460-449: Was constructed through Japanese Gulch . The first 113 workers at the Everett factory began work on January 3, 1967, and prepared for the assembly of the relocated Renton mockup. The factory was officially opened on May 1, 1967, four months after the first workers had arrived to start construction of the 747. Construction of the factory involved 4.5 million cubic yards (3,400,000 m) of soil to be excavated. The main factory building
18602-527: Was delayed until 29 April 1938. The aircraft was delivered to the Army on 31 January 1939. Once service testing was complete, the Y1B-17s and Y1B-17A were redesignated B-17 and B-17A, respectively, to signify the change to operational status. The Y1B-17A had a maximum speed of 311 mph (270 kn; 501 km/h), at its best operational altitude, compared to 239 mph (208 kn; 385 km/h) for
18744-818: Was effectively scrapped in early 1945. The B-17 began operations in World War II with the Royal Air Force (RAF) in 1941, and in the Southwest Pacific with the U.S. Army. During World War II, the B-17 equipped 32 overseas combat groups, inventory peaking in August 1944 at 4,574 USAAF aircraft worldwide. The British heavy bombers, the Avro Lancaster and Handley Page Halifax , dropped 608,612 long tons (681,645 short tons; 618,378 t) and 224,207 long tons (251,112 short tons; 227,805 t) respectively. The RAF entered World War II without
18886-401: Was operated by German-speaking radio operators to identify and jam German ground controllers' broadcasts to their nightfighters . They could also pose as ground controllers themselves to steer nightfighters away from the bomber streams . The air corps – renamed United States Army Air Forces (USAAF) on 20 June 1941 – used the B-17 and other bombers to bomb from high altitudes with the aid of
19028-406: Was originally 43 acres (17 ha) and later expanded by 45 percent in 1979 as part of the Boeing 767 program and another 50 percent in 1990 for the Boeing 777 . The company acquired 68 acres (28 ha) of Paine Field property from the county government in 1989 to expand its flight line. To accommodate the Dreamlifter , a converted 747-400 which delivered 787 sections to the plant,
19170-466: Was primarily employed by the USAAF in the daylight component of the Allied strategic bombing campaign over Europe, complementing RAF Bomber Command 's night bombers in attacking German industrial, military and civilian targets. Of the roughly 1.5 million tons of bombs dropped on Nazi Germany and its occupied territories by Allied aircraft, over 640,000 tons (42.6%) were dropped from B-17s. At
19312-409: Was reputed to have designed and built the first artificial, self-propelled flying device, a bird-shaped model propelled by a jet of what was probably steam, said to have flown some 200 m (660 ft). This machine may have been suspended for its flight. Some of the earliest recorded attempts with gliders were those by the 9th-century Andalusian and Arabic-language poet Abbas ibn Firnas and
19454-470: Was tested with overhead rails to prevent it from rising. The test showed that it had enough lift to take off. The craft was uncontrollable and it is presumed that Maxim realized this because he subsequently abandoned work on it. Between 1867 and 1896, the German pioneer of human aviation Otto Lilienthal developed heavier-than-air flight. He was the first person to make well-documented, repeated, successful gliding flights. Lilienthal's work led to him developing
19596-542: Was the German Heinkel He 178 , which was tested in 1939. In 1943, the Messerschmitt Me 262 , the first operational jet fighter aircraft, went into service in the German Luftwaffe . The first jet airliner , the de Havilland Comet , was introduced in 1952. The Boeing 707 , the first widely successful commercial jet, was in commercial service for more than 50 years, from 1958 to 2010. The Boeing 747
19738-598: Was the first combat aircraft that could continue its mission if one of its four engines failed. On 20 August 1935 , the prototype flew from Seattle to Wright Field in nine hours and three minutes with an average ground speed of 252 mph (219 kn; 406 km/h), much faster than the competition. At the fly-off, the four-engined Boeing's performance was superior to those of the twin-engine DB-1 and Model 146. In March 1935 Army Chief of Staff General Douglas MacArthur created GHQ Air Force and promoted lieutenant colonel Frank Maxwell Andrews to brigadier general to become
19880-641: Was the first jet to use a wide-body configuration for carrying passengers. Because of the vast size of the 747, the Boeing Everett Factory was designed and built to accommodate the assembly of these large planes as there was not enough room at the Boeing facilities in Seattle. Production of this aircraft began in 1967 and continued until 2022, with the last 747-8F (N863GT) rolling out in December for customer Atlas Air . The Boeing 787 Dreamliner
20022-529: Was the world's biggest passenger aircraft from 1970 until it was surpassed by the Airbus A380 in 2005. Supersonic airliner flights , including those of the Concorde , have been limited to over-water flight at supersonic speed because of their sonic boom , which is prohibited over most populated land areas. The high cost of operation per passenger-mile and a deadly crash in 2000 induced the operators of
20164-533: Was unsuccessful. On 24 July three B-17s of 90 Squadron took part in a raid on the German capital ship Gneisenau and Prinz Eugen anchored in Brest from 30,000 ft (9,100 m), to draw German fighters away from 18 Handley Page Hampdens attacking at lower altitudes, and in time for 79 Vickers Wellingtons to attack later with the German fighters refueling. The operation did not work as expected, with 90 Squadron's Fortresses being unopposed. By September,
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