Quote:
Originally Posted by aerohead
Hoerner published the thrust for the cooling system on the Messerschmitt Me-109,I don't have that with me,but again,we're looking at a 500+ mph aircraft where compressibility effects are active,not so in low speed aerodynamics.
Also,imagine the maximum heat flux coming from a V-16 aero engine at max power setting.
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I completely blew it on the Messerschmitt data.
*It's only a 380-mph airplane.
*1,200 hp
*The exhaust pipes provide 140-pounds of thrust @ max. power setting.
*There is no cooling system thrust as with the North American P-51.
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*For the P-51 to have thrust from the Allison V-16 cooling system it must be in transonic flow,where compressibility effects are at play,otherwise the thrust would project forward through the heat exchangers as well as rearward,cancelling it out.
*The compression of the high speed flight would be acting like the shutters of the ram-jet engine of the German V-1 buzz-bomb,allowing zero thrust to pass 'backwards' out the intake slot.
*So in an automobile,unless we're traveling at least 250-mph in standard air,we'd have no chance to capitalize on any cooling system thrust.
