THE combined effect of Sections III and IV is a gain of up to 3 per cent t.h.p. at moderate speeds, over the best systems without a blower, in spite of the detrimental effect of heating of the air due to compression. The blower absorbs about 10 per cent b.h.p. which is additionally recovered as useful thrust. Pressure air cooling does not permit the economical use of materially smaller matrices.
Lind Walker, G.E. (1946), "Pressure Air Cooling Technique: A Survey of Present Knowledge with a Programme for Future Research", Aircraft Engineering and Aerospace Technology, Vol. 18 No. 2, pp. 38-62. https://doi.org/10.1108/eb031334Download as .RIS
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