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Saunders Helicogyre : ウィキペディア英語版 | Saunders Helicogyre
The Saunders Helicogyre was a 1920s experimental helicopter designed by Vittorio Isaaco and built by S.E. Saunders Limited for the British Air Ministry.〔 ==Design and development== Vittorio Isacco designed and built four different Helicogyre experimental helicopters between 1926 and 1935. In 1928 Air Ministry Specification 2/28 was issued to S.E Saunders for a prototype helicopter to the Helicogyre No. 3 design.〔 The Helicogyre had a conventional 1920s tractor aircraft fuselage and main landing gear but had an extended tailskid to keep the fuselage horizontal.〔 At the front of the fuselage was a Armstrong Siddeley Genet piston engine.〔 Behind the cockpit was a braced post on which was fitted a four-bladed rotor, each rotor blade was fitted with a Bristol Cherub piston engine at the tip.〔 The Helicogyre serial number ''K1171'' was completed in 1929 and delivered to the Royal Aircraft Establishment at Farnborough by road.〔 It was tested in the Balloon Shed,〔("Saunders Roe Skeeter" ) ''Flight'' 1956 p355〕 but ground tests were not completed and the programme was cancelled on 30 December 1931 without the Helicogyre having flown.〔
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