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Bell 30
The Bell Model 30 was the prototype for the first commercial helicopter, and the first helicopter built by Bell Aircraft Company. Designed by Arthur M. Young, the type served as a demonstration test bed for the successful Model 47.〔
==Development==
Young had experimented with helicopter designs, mainly using scale models, and in 1941 he approached the Bell Aircraft Corporation in Buffalo, New York. The company agreed to build a number of full-scale prototypes, and Young moved to Buffalo. With the main Bell factories immersed in war production, and to ensure a research and development program that was sufficiently private and free of distractions, Young and his team moved to the Buffalo suburb of Gardenville (West Seneca). The ''Ship 1'' prototype's first serious mishap occurred near the very end of 1942 in captive testing, when a Bell corporate pilot asked to try the Ship 1, while not using a seat belt and hanging onto the controls instead to stay in the open cockpit - this captive flight attempt resulted in the rotor system "going through resonance" as designer Arthur Young had warned about, resulting in a "bucking" instability and accident which cracked the rotor blades loose. The first free flight of ''Ship 1'' was carried out on June 26, 1943, only the third American helicopter to fly.
The Ship 1 prototype registration ''NX41860'' had an open cockpit, an enclosed fuselage for the Franklin piston engine, and a fixed three-wheel landing gear.〔 The engine drove a two-bladed main rotor and a two-bladed anti-torque tail rotor. The prototype crashed in September 1943 and was subsequently modified with several improvements, including an enclosed cabin for the pilot and passenger, who sat side by side in the cockpit.〔 With all the lessons learned, the third prototype became the basis for the production model, the Bell Model 47.〔 The Model 30 Ship 1A, ''Genevieve'', is now on display at the Steven F. Udvar-Hazy Center of the Smithsonian Air and Space Museum.〔(Bell Model 30 Ship 1A Genevieve - Smithsonian National Air and Space Museum )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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