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aeronewsline :: Accueil :: Histoire :: Aéronefs 1956 à 1965
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Fairey Rotodyne
par Forest Lun 09 Aoû 2010, 15:11
Le Rotodyne de Fairey sur Wikipedia.en
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The Fairey Rotodyne was a 1950s [Vous devez être inscrit et connecté pour voir ce lien] designed and built by [Vous devez être inscrit et connecté pour voir ce lien] and intended for commercial and military applications.[Vous devez être inscrit et connecté pour voir ce lien]
A development of the earlier [Vous devez être inscrit et connecté pour voir ce lien] which had established a world helicopter speed record, the Rotodyne featured a [Vous devez être inscrit et connecté pour voir ce lien]-powered rotor that burned a mixture of fuel and compressed air bled from two wing-mounted [Vous devez être inscrit et connecté pour voir ce lien].
[Vous devez être inscrit et connecté pour voir ce lien]
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The Fairey Rotodyne was a 1950s [Vous devez être inscrit et connecté pour voir ce lien] designed and built by [Vous devez être inscrit et connecté pour voir ce lien] and intended for commercial and military applications.[Vous devez être inscrit et connecté pour voir ce lien]
A development of the earlier [Vous devez être inscrit et connecté pour voir ce lien] which had established a world helicopter speed record, the Rotodyne featured a [Vous devez être inscrit et connecté pour voir ce lien]-powered rotor that burned a mixture of fuel and compressed air bled from two wing-mounted [Vous devez être inscrit et connecté pour voir ce lien].
Forest- CLUB
- Messages : 334
Re: Fairey Rotodyne
par Forest Lun 09 Aoû 2010, 15:13
The rotor was driven for vertical takeoffs, landings and hovering, and low-speed translational flight, and autorotated during cruise flight with all engine power applied to two propellers.
Although promising in concept and entirely successful in trials, the Rotodyne program was eventually cancelled when a combination of politics and the lack of commercial orders doomed the project.
Although promising in concept and entirely successful in trials, the Rotodyne program was eventually cancelled when a combination of politics and the lack of commercial orders doomed the project.
Forest- CLUB
- Messages : 334
Re: Fairey Rotodyne
par Forest Lun 09 Aoû 2010, 15:15
Design and development
Fairey developed the [Vous devez être inscrit et connecté pour voir ce lien], a unique aircraft in its own right that defined a third type of rotorcraft, including [Vous devez être inscrit et connecté pour voir ce lien] and helicopter.
Having little in common with the later Rotodyne, it was characterised by its inventor, Dr. J.A.J. Bennett, formerly Chief
Technical Officer of the pre-[Vous devez être inscrit et connecté pour voir ce lien] as an intermediate aircraft designed to combine the safety and simplicity of the autogyro with hovering performance.
Fairey developed the [Vous devez être inscrit et connecté pour voir ce lien], a unique aircraft in its own right that defined a third type of rotorcraft, including [Vous devez être inscrit et connecté pour voir ce lien] and helicopter.
Having little in common with the later Rotodyne, it was characterised by its inventor, Dr. J.A.J. Bennett, formerly Chief
Technical Officer of the pre-[Vous devez être inscrit et connecté pour voir ce lien] as an intermediate aircraft designed to combine the safety and simplicity of the autogyro with hovering performance.
Forest- CLUB
- Messages : 334
Re: Fairey Rotodyne
par Forest Lun 09 Aoû 2010, 15:18
Its rotor was driven in all phases of flight with collective pitch being an automatic function of shaft torque, with a side-mounted propeller providing both thrust for forward flight and rotor torque correction.
The FB-1 set a world airspeed record in 1948, but a fatal accident due to poor machining of a rotor blade flapping link retaining nut terminated development of the pure gyrodyne.
The FB-1 set a world airspeed record in 1948, but a fatal accident due to poor machining of a rotor blade flapping link retaining nut terminated development of the pure gyrodyne.
Forest- CLUB
- Messages : 334
Re: Fairey Rotodyne
par Forest Lun 09 Aoû 2010, 15:22
Fairey put forward their various designs for the proposed BEA Bus, which were revised over the years, and received government funding.
However, getting access to engines proved to be difficult, with first [Vous devez être inscrit et connecté pour voir ce lien] then [Vous devez être inscrit et connecté pour voir ce lien] claiming lack of resources.
The [Vous devez être inscrit et connecté pour voir ce lien] contracted in 1953 for the building of the prototype ([Vous devez être inscrit et connecté pour voir ce lien] XE521).
However, getting access to engines proved to be difficult, with first [Vous devez être inscrit et connecté pour voir ce lien] then [Vous devez être inscrit et connecté pour voir ce lien] claiming lack of resources.
The [Vous devez être inscrit et connecté pour voir ce lien] contracted in 1953 for the building of the prototype ([Vous devez être inscrit et connecté pour voir ce lien] XE521).
Forest- CLUB
- Messages : 334
Re: Fairey Rotodyne
par Forest Lun 09 Aoû 2010, 15:23
he Rotodyne had a large, four-blade [Vous devez être inscrit et connecté pour voir ce lien] and two [Vous devez être inscrit et connecté pour voir ce lien] N.E.L.3 turboprops, one mounted under each of the fixed wings.
For takeoff and landing, the rotor was driven by tip-jets, powered by compressors driven through a clutch by the main engines, and the compressed air produced was mixed with fuel and burned.
For takeoff and landing, the rotor was driven by tip-jets, powered by compressors driven through a clutch by the main engines, and the compressed air produced was mixed with fuel and burned.
Forest- CLUB
- Messages : 334
Re: Fairey Rotodyne
par Forest Lun 09 Aoû 2010, 15:24
As a torqueless rotor system, no anti-torque correction system was required, though propeller pitch was controlled by the [Vous devez être inscrit et connecté pour voir ce lien] pedals for low-speed yaw control.
The propellers provided thrust for translational flight while the rotor autorotated.
The cockpit controls included a cyclic and collective pitch lever, as in a conventional helicopter.
The propellers provided thrust for translational flight while the rotor autorotated.
The cockpit controls included a cyclic and collective pitch lever, as in a conventional helicopter.
Forest- CLUB
- Messages : 334
Re: Fairey Rotodyne
par Forest Lun 09 Aoû 2010, 15:26
While the prototype was being built, funding for the program reached a crisis.
Cuts in defence spending led the [Vous devez être inscrit et connecté pour voir ce lien] to withdraw support, pushing the burden of the costs onto any possible civilian customer.
The Government agreed to continued funding only if, among other qualifications, Fairey and Napier (through their parent [Vous devez être inscrit et connecté pour voir ce lien]) contributed to development costs of the Rotodyne and the Eland engine respectively.
Cuts in defence spending led the [Vous devez être inscrit et connecté pour voir ce lien] to withdraw support, pushing the burden of the costs onto any possible civilian customer.
The Government agreed to continued funding only if, among other qualifications, Fairey and Napier (through their parent [Vous devez être inscrit et connecté pour voir ce lien]) contributed to development costs of the Rotodyne and the Eland engine respectively.
Forest- CLUB
- Messages : 334
Re: Fairey Rotodyne
par Forest Lun 09 Aoû 2010, 15:28
Testing and evaluation
Although J.A.J. Bennett had left Fairey to join Hiller Helicopters in California, the prototype, its development assumed by Dr. George S. Hislop, made its first flight on 6 November 1957 piloted by Chief Helicopter Test Pilot [Vous devez être inscrit et connecté pour voir ce lien] and Assistant Chief Helicopter Test Pilot [Vous devez être inscrit et connecté pour voir ce lien] as Second Pilot.
Although J.A.J. Bennett had left Fairey to join Hiller Helicopters in California, the prototype, its development assumed by Dr. George S. Hislop, made its first flight on 6 November 1957 piloted by Chief Helicopter Test Pilot [Vous devez être inscrit et connecté pour voir ce lien] and Assistant Chief Helicopter Test Pilot [Vous devez être inscrit et connecté pour voir ce lien] as Second Pilot.
Forest- CLUB
- Messages : 334
Re: Fairey Rotodyne
par Forest Lun 09 Aoû 2010, 15:31
The first successful transition from vertical to horizontal and back to vertical flight was achieved on 10 April 1958.[Vous devez être inscrit et connecté pour voir ce lien]
The Rotodyne performed to expectations and set a world speed record in the convertiplane category, at 190.9 mph (307.2 km/h) on 5 January 1959, over a 60 mi (100 km) closed circuit
The Rotodyne performed to expectations and set a world speed record in the convertiplane category, at 190.9 mph (307.2 km/h) on 5 January 1959, over a 60 mi (100 km) closed circuit
Forest- CLUB
- Messages : 334
Re: Fairey Rotodyne
par Forest Lun 09 Aoû 2010, 15:35
The prototype was demonstrated several times at the [Vous devez être inscrit et connecté pour voir ce lien] and [Vous devez être inscrit et connecté pour voir ce lien] air shows, regularly amazing onlookers.
The Rotodyne's tip drive and unloaded rotor made its performance far better when compared to pure helicopters and other forms of "convertiplanes."
The aircraft could be flown at 175 kn (324 km/h) and pulled into a steep climbing turn without demonstrating any adverse handling characteristics.
The Rotodyne's tip drive and unloaded rotor made its performance far better when compared to pure helicopters and other forms of "convertiplanes."
The aircraft could be flown at 175 kn (324 km/h) and pulled into a steep climbing turn without demonstrating any adverse handling characteristics.
Forest- CLUB
- Messages : 334
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