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Aviatika-MAI-890
The Aviatika-MAI-890 is a pod-and-boom, pusher configuration biplane ultralight designed and built by the Moscow Aviation Institute (MAI) in Russia in the 1980s. As well as being a sport and training aircraft, significant numbers have been used for agricultural spraying. It remained in production in 2011.〔〔Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition'', page 113. BAI Communications, 15 July 1998. ISBN 0-9636409-4-1〕
==Design and development==
The MAI-890 design originated and was developed by the Experimental Aircraft design section, known as OSKBES, of the School of Aeronautics at the MAI. From about 1990 the MAI design bureau became part of the Aviatika joint-stock company to facilitate aircraft production, so that for much of the 1990s the 890 was an Aviatika product. In 1998 MAI acquired the production rights from Aviatika and marketed it as the Aviatika-MAI-890. The starting point was the open cockpit, short span Junior which appeared in 1987 and developed into the full-span, enclosed seat prototype MAI-89 in 1989. The production prototype, designated MAI-890, followed the next year and production began in 1991. Since then two seat and agricultural versions have been produced.〔
The MAI-890 has a structure of mixed aluminium, titanium and steel alloys and is fabric covered. It is an unequal span biplane with a straight lower wing of constant chord and some dihedral, which carries full span ailerons. The upper wing has greater span, some sweep but no dihedral, with constant chord over much of its span but with taper on the outer panels. It is a single bay biplane with one, slender interplane strut on each side assisted by flying wires; at its centre, the upper wing is fixed to the underwing engine mounting. Enclosed single or side-by-side seating is positioned ahead of the lower wing leading edge. A slender boom from the bottom of the fuselage pod carries the empennage; all tail surfaces are straight edged and strongly tapered and have generous control areas, with ground-adjustable trim tabs on the elevators.〔
All current MAI-890 are powered by Rotax engines mounted in pusher configuration, the type depending on the aircraft variant and option. It has a short-legged, fixed tricycle undercarriage with cantilever main legs attached the boom behind the cabin.〔
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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