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Aviation History
1957
1957 - 1021.PDF
FLIGHT, 26 July 1957 111 Aero Engines 1957 | E who essays a study of a rapidly changing field like that of aircraft propulsion must expect surprises when he pauses to survey the scene at any given time. After perusal of the following pages—wherein the Technical Editor summarizes the work of the world's aero-engine companies—the reader may find it scarcely credible that 20 years ago all aircraft powerplants were piston engines, with their designers arguing heatedly the relative merits of air cooling or liquid cooling, sleeve valves and poppet valves, in-lines and radials. . . . Today the propulsion of flying vehicles has become a subject so vast that no man can hope to master all of it. Typical of the contrasts which this science presents are the Wellsian scene of rocket-testing below and the traditional piston engines with which, overleaf, this review opens. The drawings which illustrate this review are "Flight" copyright illustrations; they are not to scale.
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