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Transverse Rotors
Transverse rotor aircraft have two large horizontal rotor assemblies mounted side by side. Single-rotor helicopters (unicopters) need an additional tail rotor or tail exhaust to neutralize the reactional angular momentum produced by the main rotor. Transverse rotor helicopters, however, use counter-rotating rotors, with each cancelling out the other's torque. Counter-rotating rotor blades also won't collide with and destroy each other if they flex into the other rotor's pathway. In addition, transverse rotor configuration has the advantage of higher payload with shorter blades, since there are two sets working to provide lift. Also, all of the power from the engines can be used for lift, whereas a single-rotor helicopter must divert part of its engine power to generate tail thrust. Transverse rotor design with rotatable nacelles are known as tiltrotors while designs where the whole wing rotates are known as tiltwings. List of transverse rotor aircraft Transverse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iwo Jima Osprey
Iwo or IWO may refer to: People * Iwo Byczewski (born 1948), Polish diplomat * Iwo Dölling (1923–2019), Swedish diplomat * Iwo Gall (1890–1959), Polish theater director, stage designer, and pedagogue * Iwo Kaczmarski (born 2004), Polish footballer * Iwo Lominski (1905–1968), Polish-born microbiologist * Iwo Odrowąż (died 1229), medieval Polish humanist, statesman, and bishop * Iwo Cyprian Pogonowski (1921–2016), Polish-born polymath and inventor * Iwo Zaniewski (born 1956), Polish painter, photographer, director, and artistic director Places * Iwo Islands, another name for the Volcano Islands of Japan, of which Iwo Jima is one **Iwo Jima, a small island in Japan, site of the Battle of Iwo Jima during World War II * Iwo Kingdom, a traditional state based on the city of Iwo in Osun State, Nigeria ** Iwo, Osun, a city in the Nigerian state of Osun Other uses *IWO, the International Workers Order, a pro-Communist fraternal organization and insurance company See ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tiltwing
A tiltwing aircraft features a wing that is horizontal for conventional forward flight and rotates up for vertical takeoff and landing. It is similar to the tiltrotor design where only the propeller and engine rotate. Tiltwing aircraft are typically fully capable of VTOL operations.Markman, Steve and Bill Holder. "Tilt-Wing VTOL Systems". ''Straight Up: A History of Vertical Flight''. Schiffer Publishing, 2000. . The tiltwing design offers certain advantages in vertical flight relative to a tiltrotor. Because the slipstream from the rotor strikes the wing on its smallest dimension, the tiltwing is able to apply more of its engine power to lifting the aircraft. For comparison, the V-22 Osprey tiltrotor loses about 10% of its thrust to interference from the wings. Another advantage of tiltwing aircraft is the ease of transition between VTOL and horizontal flight modes. A tiltrotor must first fly forwards like a helicopter, building airspeed until wing lift is sufficient to allow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AgustaWestland AW609
The AgustaWestland (now Leonardo) AW609, formerly the Bell/Agusta BA609, is a twin-engined tiltrotor VTOL aircraft with a configuration similar to that of the Bell Boeing V-22 Osprey. It is capable of landing vertically like a helicopter while having a range and speed in excess of conventional rotorcraft. The AW609 is aimed at the civil aviation market, in particular VIP customers and offshore oil and gas operators. Development Origins and program changes The BA609 drew on experience gained from Bell's earlier experimental tiltrotor, the XV-15. In 1996, Bell and Boeing had formed a partnership to develop a civil tiltrotor aircraft; however, in March 1998, it was announced that Boeing had pulled out of the project. In September 1998, it was announced that Agusta had become a partner in the development program. This led to the establishment of the Bell/Agusta Aerospace Company (BAAC), a joint venture between Bell Helicopter and AgustaWestland, to develop and manufacture the a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platt-LePage XR-1
The Platt-LePage XR-1, also known by the company designation PL-3,Francillon 1990, p.49. was an early American transverse rotors helicopter, built by the Platt-LePage Aircraft Company of Eddystone, Pennsylvania. The winner of a United States Army Air Corps design competition held in early 1940, the XR-1 was the first helicopter tested by the USAAF, flying in 1941. The flight testing of the XR-1 proved troublesome, and although continued testing showed that the design had promise, other, improved helicopters were becoming available before the XR-1 was ready for service. As a result, the development of the aircraft was terminated in 1945. Design and development Developed during 1939 from an earlier, unsuccessful design, the PL-1,Charnov 2003, p.171. the Platt-LePage Model PL-3 was the winner of a 1940 design competition, held under the terms of the Dorsey-Logan Act, for the supply of a helicopter design to the United States Army Air Corps. Platt-LePage's submission was judged by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mil Mi-12
The Mil V-12 (NATO reporting name: Homer), given the project number ''Izdeliye 65'' ("Item 65"), is the largest helicopter ever built. The designation "Mi-12" would have been the name for the production helicopter and was not applied to the V-12 prototypes. Design and development Design studies for a giant helicopter were started at the Mil OKB in 1959, receiving official sanction in 1961 by the GKAT (''Gosudarstvenny Komitet po Aviatsionnoy Tekhnike'' - State Committee on Aircraft Technology) instructing Mil to develop a helicopter capable of lifting . The GKAT directive was followed by a more detailed specification for the V-12 with hold dimensions similar to the Antonov An-22, intended to lift major items of combat materiel as well as 8K67, 8K75 and 8K82 inter-continental ballistic missiles (ICBM). Design limitations forced Mil to adopt a twin rotor system but design studies of a tandem layout, similar to the Boeing CH-47 Chinook, revealed major problems. The single rotor l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McDonnell XHJH Whirlaway
The McDonnell XHJH Whirlaway, aka McDonnell Model 65, was a 1940s American experimental transverse-rotor helicopter designed and built by McDonnell Aircraft Corporation for the United States Navy and was the largest helicopter at the time, as well as the first successful twin-engined twin-rotor helicopter in the world. Design and development In 1944, the United States Navy issued a requirement for a large rescue helicopter with capacity for ten occupants. The design was originally designated XHJD-1; shortly after flying it was re-designated the XHJH-1. It was derived from the single-engined, twin rotor Platt-LePage XR-1. James McDonnell had invested in that company in 1942 and some of his engineers had been working there, gaining experience of helicopter design and production techniques. McDonnell took control of the company in June 1944. The XHJH-1 first flew two months later. It had twin side-by-side rotors at the end of pylon wings which turned in opposite directions. Each ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landgraf H-2
The Landgraf H-2 was an American single-seat twin-rotor helicopter designed by Fred Landgraf and built by the Landgraf Helicopter Company of Los Angeles, California. Although awarded a development contract by the United States Army, it was not developed and was overtaken by more advanced designs. Design and development Fred Landgraf formed the Landgraf Helicopter Company in September 1943 to develop and manufacture the H-2. It had an enclosed structure for one pilot and an 85 hp (63 kW) radial engine driving two rotors, each rotor fitted to a short boom on each side of the fuselage. It had a fixed tricycle landing gear. The H-2 first flew on 2 November 1944 and the company was awarded a development contract by the United States Army. It was not developed or bought and the company ceased operations by the end of the 1940s. Unlike conventional helicopters, the H-2 used a tension-rod drive system to drive the side-by-side rotors. Control of blade pitch was also unconventio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kamov V-100
The V-100 was a projected side-by-side twin-rotor compound helicopter combat aircraft from Kamov. It had a pusher propeller located behind the rear tailplane, rotors mounted on the tips of its wings and two turbines mounted above the central fuselage, to have the aircraft exceed a projected speed of 400 km/h. accessed 11.03.2021 Integral gun armament was planned to consist of two mobile AO-9 single barrel derivatives of the (one on each side) or a single fixed AO-10 (early version of the ). Other weapons would have included the |
Kamov Ka-22
The Kamov Ka-22 ''Vintokryl'' (rotor-wing, or literally, (air)screw-wing) (Cyrillic:Камов Ка-22 Винтокрыл) (NATO reporting name: Hoop) was a rotorcraft developed by Kamov for the Soviet Air Force. The experimental transport aircraft combined the capabilities of a helicopter for vertical take-off and landing with those of a fixed-wing aircraft for cruise. The Ka-22 carried a large payload, having a hold comparable in size to the Antonov An-12. Eight world records for altitude and speed were set by the Ka-22 in its class, none of which have since been broken."Helicopter Ka-22." ''Kamov Company.'' Retrieved: 5 June 2008. Development In order to increase the effective range of a helicopter, Kamov designer[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Focke-Wulf Fw 61
The Focke-Wulf Fw 61 is often considered the first practical, functional helicopter, first flown in 1936. It was also known as the Fa 61, as Focke began a new company—Focke-Achgelis—in 1937. Design and development Professor Henrich Focke, through his development of the Fw 186, and through the efforts of producing the C.19 and C.30 autogyros under licence, came to the conclusion that the limitations of autogyros could be eliminated only by an aircraft with a powered rotor, the helicopter. He and engineer Gerd Achgelis started the design for this helicopter in 1932. A free-flying model, built in 1934 and propelled by a small two-stroke engine, brought the promise of success. Today, the model can be seen in the Deutsches Museum in Munich. On 9 February 1935, Focke received an order for the building of a prototype, which was designated the Fw 61; Focke referred to it as the F 61. Roluf Lucht of the technical office of the RLM extended the order for a second aircraft on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Focke-Achgelis Fa 223 Drache
The Focke-Achgelis Fa 223 ''Drache'' () was a helicopter developed by Germany during World War II. A single Bramo 323 radial engine powered two three-bladed rotors mounted on twin booms on either side of the cylindrical fuselage. Although the Fa 223 is noted for being the first helicopter to attain production status, production of the helicopter was hampered by Allied bombing of the factory, and only 20 were built. The Fa 223 could cruise at with a top speed of , and climb to an altitude of . The ''Drache'' could transport cargo loads of over at cruising speeds of and altitudes approaching . Design and development Henrich Focke had been removed by the Nazi regime from the company he had co-founded in 1936. Though the ostensible reason was that he was "politically unreliable", the RLM decision to phase Focke-Wulf into the production program of the almost-ready Messerschmitt Bf 109 necessitated an influx of capital to fund the immediate expansion of the company's produc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Firth Helicopter
The Firth Helicopter was a British helicopter of the early 1950s. Designed to exploit new outrigger rotor technology, the helicopter was abandoned during construction. Design and development Based on the designs of American engineer Fred Landgraf who established the Landgraf Helicopter Corporation in the early years of the Second World War, The Firth Helicopter was more of a "proof-of-concept" aircraft than a true prototype. Firth Helicopters Ltd. had obtained rights to the Landgraf patents regarding a concept which involved twin outrigger pylons carrying three-bladed rotors fitted with ailerons to change direction. The design team of Heenan, Winn and Steele, led by Major J.N. Dundas Heenan who had been previously involved in a similarly unorthodox 1948 aircraft project, the Planet Satellite, utilized the fuselage of the second Satellite prototype, registered ''G-ALXP'' in 1951. The small, streamlined Satellite monocoque fuselage consisted of panels of an extremely light magnesiu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
