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Aviation History
1946
1946 - 2114.PDF
440 FLIGHT OCTOBER 24TH, 1946 GLIDING IN CZECHOSLOVAKIA (Right). Daily inspection of the "Rheinland" sailplane at Kralupy, near Prague. (Lower right). Brigadier Prender- gast of the British Military Mission in Prague is a keen pilot of both private and military experience. It was he who promoted the idea of a party to visit the Czech gliding community. (Above). Mr. Vahalla, secretary of the gliding section of the Czech National Aero Club (left), with Mr. Ben Prochazca, the guide, philosopher and friend to the British party. A Bristol (T. Rex Young and W. L. Jennings); Cambridge (P. R. Wijewardene) ; Derby and Lanes (Miss Zita Paddon and B. J. Thomas); Leicester (J. Cecil Rice); London(P. J. Tovey); and Midland (Charles J. Wingfield). Sailplane Competition Prize Offered by B.Q.A, for TwO'seat High-performance Design T IE DUKE OF SUTHERLAND, K.T., a Vice- The cockpit(s) shall be closed. Clear vision panels mustPresident of the Royal Aero Club, has donated ^125 t)e provided, to the British Gliding Association, through the Com- The view sha11 be such that either pilot can fly the aircraft mittee of the Club, to be used as a prize for a design compe- wi'h ease' and safety in a11 circumstances, tition for a high-performance two-seater sailplane. Below laifn™,J?fOn b° the usual forms ot sailplane is given the specification which has Deen drawn up by A bmlt;in whee]ed undercarria is required. the Technical Committee of the B.G.A., together with rules and details of the competition. Aerodynamicsrr»MPRTTTTON Rin BQ minimum sinking speed shall not exceed 2.4 f.p.s. at .. ... . , COMPETITION RULES a speed not greater than 40 m.p.h. The sinking speed at(1) All entries lor the contest, which is open only to British 80 m.p.h. shall not exceed 10 f p s nationals, must be received by the Secretary of the British Dive brakes shall be fitted which, when extended limit Gliding Association, 119, Piccadilly, W.i, not later than the terminal velocity to 90 per cent of the Design Diving March 31st, 1947 Speed (4.5 V,). 8 (2) Intending entrants, who may be individuals or a group, A tail trimmer shall be provided should apply immediately to the Secretary of the British Glid- St u t ing Association for a competition number. Every drawing or ^f "f6,, • . , ., . paper submitted shall be£ this number, which shall be the Hi™e *f°™D& requirements shall be met when carrying as only form ol identification appearing on the entry. aisposaoie load . —- (3) The decision of the adjudicating committee shall be final lwo pi °^ wlth pfrachutes Not less than 331 lb 4 The British Gliding Association reserves the right to have *.°rmal ^V'8 ">^.«™enta 8 lb aircraft built to any of the designs submitted, for research or ,™ TV*-! SP®. e<lulPment 5<>lb record-breaking purposes without fee. Any aircraft which may t t f ° "^ ^ m the Periormiltice be built commercially for sale shall be the subject of financial eS L^-^t rj u » , , , , . agreement between, and to the satisfaction of both the designer (a) Thj gllder shaI1. have Proof and ultimate factors of 1 and the constructor d 1.5 respectively under aerodynamic forces norms GENERAL to fllght paeh ot 5W at Climax; and any valfi The machine should be suitable for club or private owner ,h, T^T^ ^ .fV* tsPeed of 4-5 V.. use. However, emphasis should be on cross-country flying (b) Tfhe ghd" shaI1 also .have Pro°' and ultimate factors characteristics rather than slope-soaring ability ^ -> <=• of 1 and 1.5 respectively under up and down gusts It is desired to encourage the incorporation ot the latest normal to the flight path of 65 b ft/sec E.A.S. encoun- aerodynamic and structural ideas. ^Ted when m straight level flight at a speed of 3 V,. The machine should be capable ol easy and quick rigging h '? , alleviatmg factor to convert the gust to an and easy ground handling. equivalent sharp-edged gust and can be taken as Subject to these and the following requirements being met, °-3 4 v wing-loading lb/sq ft. the machine should be as small, light and cheap as possible. GENERAL RECOMMENDATIONS PARTICULAR REQUIREMENTS Controls ^^"V . . „ ,_ ^ _, . , . The machine should be easy to fly -'blind.'1 Attention Sufficient room shall be provided in the cockpit(s) to ensure should be paid to the provision of high directional and lonei- reasonable comfort for two pilots 6ft tall wearing parachutes. tudinal stability, also to the question of "feel" and harmony Full dual control is to be provided. of the contiols. Both pilots shall have easy access to all secondary controls The aircraft should have viceless stall characteristics It •nrt a good view ot all instruments. should not spin from a stall with rudder central.
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