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Aviation History
1949
1949 - 0810.PDF
May 5th, 1949 FLIGHT 527 An outstanding exhibit at the Paris Show and one which will help to confirm Britain's lead in gas- turbine development is the Armstrong Siddeley Double Mamba. This powerful " Siamese-twin " source of power is suitable for both civil and military applications. Either Mamba can drive its co-axial airscrew independently. The weight of the paired Mamba 7s with their axial compressors, com- mon front castings and auxiliary gearbox is 3.010 Ib. Their combined maximum output (sea-level static) is 2,540 s.h.p. and 768 Ib. thrust. DISPLAYED AT PARIS ^t^ The subJKf °f o unique and arrestingexhibit are the moving components—crankshaft, connecting rods and gear trains—of a BristolCentaurus 18. This \8-cylinder sleeve-valved military power unit develops 2,470 b.h.p. for take-off, night). At first glance there is a remarkable resemblance between the front and rear end of dieBristol Proteus, the tail cone and turbine being rower similar in form to the airscrew spinner andoir intake. The diameter of this advanced turbo- prop with axial and centrifugal compressors is•im- .Tne f'rst important use of the Proteus is "pected to be in the Saunders-Roe S.R. 45 flyingDO« which is to have four pairs and two single units developing a total of 32,000 h.p. plus 8,000 Ib.residual jet thrust.
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