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Marsden Gemini
The Marsden Gemini is a Canadian mid-wing, T-tailed, two-seats in side-by-side configuration, experimental research glider that was designed and constructed by Dr. David Marsden at the University of Alberta, first flying in 1973.
==Design and development==
The Gemini was designed to explore the use of flaps to create a variable geometry sailplane that would be optimized for both low speed thermalling flight and also high speed gliding between thermals.〔〔
The aircraft was predominantly made from aluminium, with some stainless steel used for the wing ribs, controls and fittings. The two-place side-by-side cockpit was made from fibreglass. Its four-piece span high aspect ratio wing employed a modified Wortmann FX-61-163/35SF airfoil. The Fowler flaps occupied the entire trailing edge of the wing and accounted for 35% of the wing chord. In cruise the flaps were retracted, reducing the wing area. While climbing, the flaps were extended, producing a high lift coefficient of 2.2. For glidepath control when landing the flaps deployed to 80° to create aerodynamic drag. The outer flaps acted as slotted ailerons for roll control.〔
Only one Gemini was built.〔〔 The aircraft is still operational and as of August 2011, owned by Gary Osoba of Wichita, Kansas, United States.〔(【引用サイトリンク】url=http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=77ZV&x=0&y=0 )〕
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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