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Slingsby Prefect
The Slingsby T.30 Prefect is a 1948 British modernisation of the 1932 single-seat Grunau Baby glider. About 53 were built for civil and military training purposes.
==Development==
In 1948, Slingsby Sailplanes developed the 1932 Grunau Baby, which it had built under licence before World War II, into the Slingsby T.30 Prefect, an intermediate-level semi-aerobatic glider suitable for civil or military use. In the same year, Elliotts of Newbury introduced its version of the Grunau Baby, the Baby Eon; all three types were visually very similar, but differed slightly in dimensions, undercarriage, airbrakes, equipment and performance.
The Prefect, like the Grunau Baby, was a single-seat fabric-covered wooden glider. It had high-mounted semi-cantilever straight-tapered wings, with a single wing bracing strut on each side, from the base of the fuselage to the wing spar. The span was 150 mm (6 in) greater than that of the Grunau Baby, and the tips enclosed the outer ends of the ailerons. Mid-chord airbrakes were fitted just outboard of the wing strut ends, extending above and below the wing. The fuselage was flat sided, and tapered from the trailing edge of the wing to a very small fin bearing a large, aerodynamically-balanced and slightly reshaped rudder that extended down to the keel. The straight-tipped tailplane, mounted on the top of the fuselage and braced from below, had a strongly swept leading edge and was placed with its trailing edge at the fin's leading edge, so that the elevators lacked the large cut out for rudder movement seen on the earlier glider. The open cockpit was better enclosed at the sides and had a small windscreen; for access, the cockpit sides and windscreen were removed as a single piece.〔(Cockpit access detail )〕 Slingsby also added a single-wheel undercarriage in addition to the earlier nose skid, placed below mid-chord.
In June 1948, the Prefect made its first flight.〔 It was about 20 kg heavier than its predecessor, but despite a higher wing loading had a significantly better lift to drag ratio, 21 compared with 17.〔
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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