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Aviator Shershen'
The Aviator Shershen' ((ロシア語:Шершень); (英語:Hornet)) is a Russian two seat biplane, sold in kit form. It first flew in 2005 and several variants have been produced, with a choice of engines.
==Design and development==
The Shershen' is a development of the company's earlier Retro. It is a kit built tandem seat single bay biplane; the prototype, Shershen'-3 and -14 have V-form interplane struts, their forward members in broad chord fairings, but the Shershen'-2 has more slender, N-form struts. All have diagonal flying wire bracing and an upper wing 8° of quarter-chord sweep, with an unswept lower wing. The -2 is rigged with 3° of dihedral (aircraft) on the upper wing and 2.33° on the lower one. The upper wing is held well above the fuselage, above the forward open cockpit, by a pair of N-form cabane struts; the wing has a trailing edge cut-out to improve the upward vision from this cockpit. The prototype had flaperons on the lower wings only but later versions have separate flaps and ailerons on both planes, the latter externally rod connected.〔
The Shershen' has a fabric covered flat sided fuselage with a steel tube frame. Rounded decking is cut away locally for the two cockpits. Both have windscreens and the rear cockpit has a prominent headrest. The Shershen's tailplane is mounted at mid-fuselage height, with an angle of incidence that can be adjusted for trimming. Additionally, there is a port elevator trim tab. The rudder is broad and rounded, extending down to the keel on all models, though two styles of fin have been used. The prototype and the -14 variant have fins with a full rounded leading edge but those of the -2 and -3 are straight edged and vertical. A fixed, conventional undercarriage with a small tailwheel has mainwheels on faired V struts hinged on the lower fuselage. On all but the -3, half-axles with bungee cord shock absorbers run to a central compression frame. The -3 variant has instead oleo legs attached to the outside of the V struts and to the mid fuselage sides.〔
Two different engine types have been used. The prototype and the -2 variant have the Subaru EJ25 flat-four, driving a three blade, ground adjustable pitch propeller, whereas the -3 has a Walter Minor III inline, inverted four cylinder unit driving a wooden, fixed pitch, two blade propeller.〔
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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