Onishi OSG3
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| OSG3 | |
|---|---|
| General information | |
| Type | Single-seat powered sailplane |
| National origin | Japan |
| Manufacturer | Yuichi Onishi |
| Number built | 1 |
| History | |
| First flight | 1977 |
The Onishi OSG3 is a 1970s Japanese single-seat motor glider, designed and built by Yuichi Onishi (大西勇一,Onishi Yuichi).[1] This was his second motor-glider design; the first being a high-wing monoplane, powered by a Subaru car engine, with which he made a 120 km (75 mi) flight between Chigasaki and Oshima Island in July 1970.[2][3]
The OSG3 is unusual in being powered by six model aircraft engines, which are arranged along a transverse strut-braced boom near the front of the fuselage. Together, the six engines produce 7.5 kW (10.1 hp) for take-off, and 5.6 kW (7.5 hp) for cruising flight.[4] There are six throttle levers and also six cut-out switches for the engines.[4] The aircraft has a cantilevered monoplane wing, in a shoulder-wing position on the fuselage. The empennage has a T-tail configuration.[1][4]
Design of the OSG3 began in January 1976, with construction commencing in July of that year. By January 1977, the aircraft had been completed and taxiing trial conducted.[1]