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Aviation History
1957
1957 - 1219.PDF
'**&&&&**"? 307 Powerplant SpanLength Armstrong SiddeleyDouble Mamba 54ft 4in43ft Drawing and photograph above show Gannet ASA. Side view below shows A.E.W.3. PowerpUnt ...Span Length RoU»-Royce Avon27ft 52fi Drawing below and photograph at right show F.D.2. THE FAIREY AVIATION CO, LTD. Hayes, Middlesex. Telephone: Hayes 3800 Gannet (Anti-submarine) The current production version of the anti-submarine Gannet is the A.S.4, which differs from the A.S.I in equipment and powerplant rating. Anti-submarine Gannets have been adopted not only by the Royal Navy and the Royal Australian Navy, but are to be supplied also to the West German Government. Of the Gannet's several unorthodox features, the Armstrong Siddeley Double Mamba powerplant is perhaps the most remarkable. Since the specific fuel consumption of a turboprop engine actually increases as the engine is throttled, the Fairey Company themselves suggested that twin turbines, coupled to drive counter-rotating propellers, would show notable economies, for one half of the engine could be shut down while the other was run at an efficient point on the consumption curve for cruise. Gannet (Trainer) The new Gannet T.5 bears the same relationship to the earlier T.2 as does the A.S.4 to the A.S.I. Both marks provide advanced training in weapon and engine handling. Gannet (Early Warning) The Gannet A.E.W.3 is a special early-warning aircraft now in production for the F.A.A. and differs very considerably from other Gannets. F.D.2 The official world's speed record of 1,132 m.p.h., established on March 10,1956, by Mr. Peter Twiss in a Fairey F.D.2 delta-wing research aircraft (Rolls-Royce Avon turbojet with reheat) continues to stand firm at this date. A matter for reflection and satisfaction— especially so as it is known that the F.D.2 is capable of yet higher sustained speeds. Two of these superb aeroplanes have been built.
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