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Vortech Skylark
The Vortech Skylark is an American helicopter produced by Vortech of Fallston, Maryland. The aircraft is supplied in the form of plans for amateur construction. Vortech also supplies rotor blades for the design.〔Downey, Julia: ''2005 Trikes 'Chutes and Rotorcraft Directory'', Kitplanes, Volume 22, Number 2, February 2005, page 60. Belvoir Publications. ISSN 0891-1851〕〔Bertrand, Noel; Rene Coulon; et al: ''World Directory of Leisure Aviation 2003-04'', pages 215. Pagefast Ltd, Lancaster UK, 2003. ISSN 1368-485X〕〔Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition'', page 334. BAI Communications, 15 July 1998. ISBN 0-9636409-4-1〕
==Design and development==
The Skylark was designed to comply with the US ''Experimental - Amateur-built'' aircraft rules. It features a single main rotor, a single-seat open cockpit without a windshield, skid-type landing gear and a twin cylinder, liquid-cooled, in-line two-stroke, carbureted Hirth 3503 aircraft engine. The twin cylinder, liquid-cooled, in-line two-stroke, Rotax 582 has also been used. A cockpit enclosure was optional.〔〔〔
The aircraft fuselage is made from welded 4130 steel tubing, with an aluminium tail boom. Its diameter two-bladed rotor employs a NACA 0012 airfoil. The main transmission is of belt and chain type, whileteh tail rotor is driven by a long shaft. The control system consists of conventional helicopters controls. The aircraft has an empty weight of and a gross weight of , giving a useful load of . With full fuel of the payload for pilot and baggage is .〔〔
The manufacturer estimates the construction time as 300 hours.〔
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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