Wright R-1750-1
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Wright R-1750-1
Wright Cyclone was the name given to a family of air-cooled radial piston engines designed by the Wright Aeronautical Corporation and used in numerous American aircraft in the 1930s and 1940s. Background The Wright Aeronautical Corporation was formed in 1919, initially to develop liquid-cooled Hispano-Suiza V8 engines under license. The Corporation's first original design, the R1, was also the first successful high-powered radial in the USA. Funded by contracts from the US Navy for new air-cooled radials, Wright started a new design (initially called the P2) in 1924. The resignation of Frederick Rentschler to form the Pratt & Whitney Aircraft Company, along with several key engineering personnel, seriously affected the development of the P2 and it did not go into production. Cyclone family R-1300 Cyclone 7 R-1750 Cyclone 9 A new design was launched in 1926, known as the R-1750 Cyclone. This was a nine-cylinder radial with a displacement of 1750 cu in and internally cooled ...
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Radial 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. It resembles a stylized star when viewed from the front, and is called a "star engine" in some other languages. The radial configuration was commonly used for aircraft engines before gas turbine engines became predominant. Engine operation Since the axes of the cylinders are coplanar, the connecting rods cannot all be directly attached to the crankshaft unless mechanically complex forked connecting rods are used, none of which have been successful. Instead, the pistons are connected to the crankshaft with a master-and-articulating-rod assembly. One piston, the uppermost one in the animation, has a master rod with a direct attachment to the crankshaft. The remaining pistons pin their connecting rods' attachments to rings around the edge of the master rod. Extra "rows" of radial cylinders can be added i ...
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Grumman TBF Avenger
The Grumman TBF Avenger (designated TBM for aircraft manufactured by General Motors) is an American World War II-era torpedo bomber developed initially for the United States Navy and Marine Corps, and eventually used by several air and naval aviation services around the world. The Avenger entered U.S. service in 1942, and first saw action during the Battle of Midway. Despite the loss of five of the six Avengers on its combat debut, it survived in service to become the most effective and widely-used torpedo bomber of World War II, sharing credit for sinking the super-battleships and (the only ships of that type sunk exclusively by American aircraft while under way) and being credited for sinking 30 submarines. Greatly modified after the war, it remained in use until the 1960s.Wheeler 1992, p. 53. Design and development The Douglas TBD Devastator, the U.S. Navy's main torpedo bomber introduced in 1935, was obsolescent by 1939. Bids were accepted from several companies, but Grum ...
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Aircraft Air-cooled Radial Piston Engines
An 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 by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet 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, but 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, usage and others. History Flying model craft and stories of manned flight go back many centuries; however, the first manned ascent — and safe descent — in modern times took place by larger hot-air ball ...
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Pratt & Whitney Wasp Series
The Pratt & Whitney Wasp was the civilian name of a family of air-cooled radial piston engines developed in the 1930s, 1940s, and 1950s.Gunston 1989, p.114. The Pratt & Whitney Aircraft Company (P&W) was founded in 1925 by Frederick B. Rentschler, who had previously been the President of Wright Aeronautical. He brought with him some of Wright's best designers and the new team quickly came up with their first design, the R-1340 Wasp. Wasp series * Pratt & Whitney R-1340 Wasp * Pratt & Whitney R-985 Wasp Junior * Pratt & Whitney R-1830 Twin Wasp * Pratt & Whitney R-1535 Twin Wasp Junior * Pratt & Whitney R-2000 Twin Wasp * Pratt & Whitney R-2180-E Twin Wasp E * Pratt & Whitney R-2800 Double Wasp * Pratt & Whitney R-4360 Wasp Major Note: the designations refer to the engine configurations as follows: "R" = Radial, followed by the approximate displacement in cubic inch The cubic inch (symbol in3) is a unit of volume in the Imperial units and United States customary units ...
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Lockheed C-121 Constellation
The Lockheed C-121 Constellation is a military transport version of the Lockheed Constellation. A total of 332 aircraft were constructed for both the United States Air Force and United States Navy for various purposes. Numerous airborne early warning versions were also constructed. The C-121 later saw service with smaller civilian operators until 1993. Design and development Lockheed's first attempt at a military version of the Constellation airliner had been unsuccessful. This was largely due to the problems encountered by the Wright R-3350 engines that powered the aircraft. After the war, the few military Constellations built (designated C-69) were retrofitted by Lockheed for use in the post-war airline industry as the L-049. In 1947, Lockheed unveiled a more economical Constellation. The L-749 as it was known, had extra fuel capacity and a more economical version of the R-3350. However, Lockheed had lost 1200 workers that same year. By 1948, production of the L-749 was a ...
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Lockheed P-2 Neptune
The Lockheed P-2 Neptune (designated P2V by the United States Navy prior to September 1962) is a maritime patrol and anti-submarine warfare (ASW) aircraft. It was developed for the US Navy by Lockheed to replace the Lockheed PV-1 Ventura and PV-2 Harpoon, and was replaced in turn by the Lockheed P-3 Orion. Designed as a land-based aircraft, the Neptune never made a carrier landing, but a small number were converted and deployed as carrier-launched, stop-gap nuclear bombers that would have to land on shore or ditch. The type was successful in export, and saw service with several armed forces. Design and development Development of a new land-based patrol bomber began early in World War II, with design work starting at Lockheed's Vega subsidiary as a private venture on 6 December 1941.Scutts ''Air International'' January 1995, pp. 42–43. At first, the new design was considered a low priority compared to other aircraft in development at the time, with Vega also developing and ...
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Douglas A-1 Skyraider
The Douglas A-1 Skyraider (formerly known as the AD Skyraider) is an American single-seat attack aircraft in service from 1946 to the early 1980s. The Skyraider had an unusually long career, remaining in front-line service well into the Jet Age (when most piston-engine attack or fighter aircraft were replaced by Jet aircraft); thus becoming known by some as an "anachronism". The aircraft was nicknamed "Spad", after the French World War I fighter. It was operated by the United States Navy (USN), the United States Marine Corps (USMC), and the United States Air Force (USAF), and also saw service with the British Royal Navy, the French Air Force, the Republic of Vietnam Air Force (RVNAF), and others. It remained in U.S. service until the early 1970s. The jet powered A-10 Thunderbolt II was based on specifications for a modernized Skyraider with a heavy payload and good endurance. Design and development The piston-engined, propeller-driven Skyraider was designed during World War I ...
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Boeing B-29 Superfortress
The Boeing B-29 Superfortress is an American four-engined propeller-driven heavy bomber, designed by Boeing and flown primarily by the United States during World War II and the Korean War. Named in allusion to its predecessor, the B-17 Flying Fortress, the Superfortress was designed for high-altitude strategic bombing, but also excelled in low-altitude night incendiary bombing, and in dropping naval mines to blockade Japan. B-29s dropped the atomic bombs on Hiroshima and Nagasaki, the only aircraft ever to drop nuclear weapons in combat. One of the largest aircraft of World War II, the B-29 was designed with state-of-the-art technology, which included a pressurized cabin, dual-wheeled tricycle landing gear, and an analog computer-controlled fire-control system that allowed one gunner and a fire-control officer to direct four remote machine gun turrets. The $3 billion cost of design and production (equivalent to $ billion today), far exceeding the $1.9 b ...
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Douglas A-20 Havoc
The Douglas A-20 Havoc (company designation DB-7) is an American medium bomber, attack aircraft, Intruder (air combat), night intruder, night fighter, and reconnaissance aircraft of World War II. Designed to meet an Army Air Corps requirement for a bomber, it was ordered by France for their air force before the USAAC decided it would also meet their requirements. French DB-7s were the first to see combat; after the fall of France, the bomber served with the Royal Air Force under the British military aircraft designation systems#Names, service name Boston. From 1941, night fighter and Intruder (air combat), intruder versions were given the service name Havoc. In 1942 USAAF A-20s saw combat in North Africa. It served with several Allies of World War II, Allied air forces, principally the United States Army Air Forces (USAAF), the Soviet Air Forces (''VVS''), Soviet Naval Aviation (''AVMF''), and the Royal Air Force (RAF) of the United Kingdom. A total of 7,478 aircraft were built, ...
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North American B-25 Mitchell
The North American B-25 Mitchell is an American medium bomber that was introduced in 1941 and named in honor of Major General William "Billy" Mitchell, a pioneer of U.S. military aviation. Used by many Allied air forces, the B-25 served in every theater of World War II, and after the war ended, many remained in service, operating across four decades. Produced in numerous variants, nearly 10,000 B-25s were built. These included several limited models such as the F-10 reconnaissance aircraft, the AT-24 crew trainers, and the United States Marine Corps' PBJ-1 patrol bomber. Design and development The Air Corps issued a specification for a medium bomber in March 1939 that was capable of carrying a payload of over at North American Aviation used its NA-40B design to develop the NA-62, which competed for the medium bomber contract. No YB-25 was available for prototype service tests. In September 1939, the Air Corps ordered the NA-62 into production as the B-25, along with the ...
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Boeing 314
The Boeing 314 Clipper was an American long-range flying boat produced by Boeing from 1938 to 1941. One of the largest aircraft of its time, it had the range to cross the Atlantic and Pacific oceans. For its wing, Boeing re-used the design from the earlier XB-15 bomber prototype. Twelve Clippers were built, nine of which served with Pan Am. Design and development Pan American had requested a truly trans-Pacific flying boat with unprecedented range and double the passenger payload of the airline's Martin M-130. Boeing's bid was successful and on July 21, 1936, Pan American signed a contract for six. Boeing engineers adapted the cancelled XB-15's wing, and replaced the Pratt & Whitney Twin Wasp radial engines with the Wright Twin Cyclone. Pan Am ordered six more aircraft with increased engine power and capacity for 77 daytime passengers as the Boeing 314A. The huge flying boat was assembled at Boeing's Plant 1 on the Duwamish River in Seattle, and towed to Elliott Bay ...
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Wright Aeronautical
Wright Aeronautical (1919–1929) was an American aircraft manufacturer headquartered in Paterson, New Jersey. It was the successor corporation to Wright-Martin. It built aircraft and was a supplier of aircraft engines to other builders in the golden age of aviation. Wright engines were used by Amelia Earhart and Charles Lindbergh. In 1929, the company merged with Curtiss Aeroplane and Motor Corporation to form Curtiss-Wright. History In 1916, the Wright brothers' original aviation firm, the Wright Company, merged with Glenn L. Martin's firm, the Glenn L. Martin Company of California, to form the Wright-Martin Aircraft Corporation. In September 1917, Martin resigned from Wright-Martin and re-formed an independent Glenn L. Martin Company of Ohio (later of Maryland). After World War I in 1919, Wright-Martin was renamed Wright Aeronautical. It moved to Paterson, New Jersey in 1919. In February 1919, an airplane with a Wright engine broke the world's speed record at 163 2–3 ...
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