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Whigham GW-3
The Whigham GW-3 is a family of American mid-wing, single-seat, FAI Open Class gliders that was designed and constructed by Gene Whigham, a retired flight test engineer for Convair.〔Said, Bob: ''1983 Sailplane Directory, Soaring Magazine'', page 67, Soaring Society of America November 1983. USPS 499-920〕
==Design and development==
The GW-3 was designed by Whigham as a glider that would be easy for a first time builder to complete and fly. As such the design emphasizes simplicity of construction to reduce building time. The GW-4 was a higher wing loading development.〔〔
The GW-3 and 4 both use a wing, with a NACA 43012A airfoil. The aircraft are all-metal, with the portion of the wing aft of the spar covered in doped aircraft fabric. The flaps and ailerons are sheet metal covered. The wing design is unusual as it uses a single spar and transmits its torsion and drag loads via a thick leading edge skin. This resulted in wings that weigh each. The prototype GW-3 weighed empty in total.〔〔
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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