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High Quality Content by WIKIPEDIA articles! The Air & Space 18A is a gyroplane manufactured in the central United States between 1965 and 2000. The Air & Space 18A is one of the last three gyroplanes issued a Standard Airworthiness Certificate (September 1961) by the United States Federal Aviation Administration (FAA). Raymond E. Umbaugh, a manufacturer of agricultural fertilizer, founded Umbaugh Aircraft Corporation in Ocala, Florida, in 1957 to develop a gyroplane based on experience he acquired while modifying single-seat Bensen Gyrocopters. Gilbert Devore commenced the design of Umbaugh's…mehr

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High Quality Content by WIKIPEDIA articles! The Air & Space 18A is a gyroplane manufactured in the central United States between 1965 and 2000. The Air & Space 18A is one of the last three gyroplanes issued a Standard Airworthiness Certificate (September 1961) by the United States Federal Aviation Administration (FAA). Raymond E. Umbaugh, a manufacturer of agricultural fertilizer, founded Umbaugh Aircraft Corporation in Ocala, Florida, in 1957 to develop a gyroplane based on experience he acquired while modifying single-seat Bensen Gyrocopters. Gilbert Devore commenced the design of Umbaugh's tandem two-seat jump-takeoff gyroplane in 1958, basing the rotor system on that of the Sznycer Omega BS-12 helicopter. The prototype Umbaugh U-17, built by Fairchild Engine and Airplane Corporation of Hagerstown, Maryland, flew in August 1959. Further test flights were conducted by chief pilot Ken Hayden and former Pitcairn Autogiro Company pilot Slim Soule. The prototype exhibited stabilityproblems due to its single rudder and minimal T-tail horizontal stabilizer positioned on a boom behind the pusher propeller.