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Aviation History
1964
1964 - 1540.PDF
fiiCHT Innrnotionol, 7) May 1964 24 Better performance for V/STOL aircraft with Bristol Siddeley vectored thrust engines Bristol Siddeley vectored thrust engines provide the simplest and most practical power systems for all V/STOL aircraft. The total thrust can be directed vertically for VTOL, at any required intermediate angle for STOL or in-flight manoeuvres, and horizontally for normal flight and for braking. Performance. In fighters, all the thrust needed for VTOL can be used in normal flight. This allows for greater acceleration, faster rates of climb and greater speeds at high altitude than are possible with alternative V/STOL engine systems in which only part of the installed thrust is available. In other aircraft, the use of vectored thrust engines as the main powerplant reduces the number of separate lifting engines required and thus the dead- weight carried in normal flight. Manoeuvrability. By directing the thrust of the engine at an angle to the line of flight, manoeuvres can be made more rapidly than is possible with aerodynamic aircraft controls only. Short Take Off and Landing. By simply vectoring the thrust of the engine to the extent required, a significant overload of fuel or weapons can be carried wherever a short run is available. ThlllSt Reversal. By directing the engine nozzles forward, 100% thrust reversal can be achieved. The Bristol Siddeley Pegasus, powerplant of the Hawker Siddeley P 1127, has been flying since October 1960 and has effectively demonstrated the advantages of vectored thrust engines over all other forms of V/STOL power. Bristol Siddeley Engines Limited. Cen- tral Office: Mercury House, 195 Knights- bridge, London SW7, England. BRISTOL SIDDELEY SUPPLY THE POWER
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