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Aviation History
1954
1954 - 0488.PDF
19 FEBRUARY 1954 ^f^^l ——11 *M fe,§J pVxi -« MVffcWiM'*?..*— —L-i—LJ^^UJ^Jk^l^Js-jiazi ^Pfe- Liai. The Free Turbine Engine POWER UNIT OF THE BRIT In the free-turbine Proteus the propeller and power- section of the engine are not mechanically coupled: the only drive connection is the gas stream. This allows the engine and propeller each to operate at its best condition, and consequently a high performance is given for a low specific fuel consumption. Starting is easy because only the compressor/turbine is spun; control is simple and direct; windmilling drag is small and the propeller can be feathered at leisure. With four Proteus 755 ermines the Britannia has 16.NX) e.h.p. available for take-oft': a power loading of but 9.35 lb. per h.p. m '£i 5 S3) p* 3J!Jji| (jf7 THE *'' AEROPLANE COMPANY LIMITED, ENGLAND
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