Haufe Hawk 3

Haufe Hawk 3

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02/28/2008. Walter Haufe of Neenah, Wisconsin, USA, designed this single-seat powered sailplane and built it at a cost of $ 1,700 in 3 1/2 years of spare-time work. The wing was of wood construction, the fuselage had a steel-tube structure and the tail was of wood and had an empty weight of 470 lb (213 kg). It was powered by a 40 hp Nelson H-59 four-cylinder horizontally-opposed two-stroke air-cooled engine, driving a two-blade airscrew which lay longitudinally above the nose when not in use. For powered flight, a hand-actuated hydraulic mechanism pivoted the airscrew and engine forward through 80° and opened the cowling, the whole operation took less than a minute to complete.


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02/28/2008. Walter Haufe of Neenah, Wisconsin, USA, designed this single-seat powered sailplane and built it at a cost of $ 1,700 in 3 1/2 years of spare-time work. The wing was of wood construction, the fuselage had a steel-tube structure and the tail was of wood and had an empty weight of 470 lb (213 kg). It was powered by a 40 hp Nelson H-59 four-cylinder horizontally-opposed two-stroke air-cooled engine, driving a two-blade airscrew which lay longitudinally above the nose when not in use. For powered flight, a hand-actuated hydraulic mechanism pivoted the airscrew and engine forward through 80° and opened the cowling, the whole operation took less than a minute to complete.