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Aviation History
1948
1948 - 1081.PDF
July 15/A, 1948 71 installed with D.H. Gipsy Queen 31 and D.H. Gipsy Major 2 engines, the first batch of production Satellites will probably be powered with the Gipsy Queen 2 (engine, about which a good deal is known and which enjoys a first- class reputation for reliability. ) We cannot leave the Satellite without giving some con- sideration to the singular effect on aeronautical engineer- Hig which is implicit in the successful prosecution of so revolutionary a concept. It is Major Heenan's calculation that, by the use of pure monocoque structure in mag- nesium-zirconium, the present norm of payload percent- age could 'be doubled. That is to say, the current average payload of about 8 per cent of the aircraft's all-up weight could be increased to about 16 per cent. No less important is the strategic aspect. In every cubic mile of sea water there are over four million tons of magnesium, and, by September, 1939, the process of extracting magnesium from sea water was well established in this country; by the end of the war, our production capacity of magnesium was nearly three thousand tons a month. The advantages attendant upon eliminating the need for importing raw materials of high strategic value do not need amplification. That an aircraft can be built of magnesium has been demonstrated, and, furthermore, that the structural strength of such an aircraft is enormously high whilst that structure remains almost fantastically light has been proven by the completely impartial tests conducted by the National Physical Laboratory. PLANET SATELLITE One D.H. Gipsy Queen 31, or Gipsy Major 10 engine Driving 6ft 6in Aeromatic v.p. propeller Span * ... -• 32ft 6in Length 26ft 3in Height 9ft3Jin» Wing area 153 sq ft Aspect ratio ... ... ... ... ... 7.24 Aerofoil section N.A.C.A. 23000 series Gross weight 2,905 Ib Wing loading 19 Ib/sq ft Power loading (Gipsy Queen 31) ll.6lb/h.p. Payload 880 1b Percentage structure weight 25.6 Estimated Performance (Gipsy Queen 31) Max T-O power 250 b.h.p. Econ cruising power (max W.M.) 181 b.h.p. Max S.L speed 208 m.p.h. Econ cruising speed (max W.M.) ... .;. 191 m.p.h. Stalling speed (max loading) 62 m.p.h. Initial rate of climb (at max load) l,450ft/min Max range with full payload 1,000 miles Max range with pilot only 2,450 miles Absolute ceiling 22,000ft T-O to clear 50ft 310 yds
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