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Old 08-05-2015, 10:58 AM   #5 (permalink)
seifrob
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Location: Czechoslovakia (sort of), Europe
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Dáčenka - '10 Dacia / Renault Logan MCV 1.5 dCi (X90 k9k)
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The idea is quite clever, but not new. In fact, it has certain application:

https://en.wikipedia.org/wiki/Base_bleed

For your purpose I agree with skyking. First reduce drag by creating as small wake as possible using fairing and other "conventional" techniques, than fill the rest with exhaust gases and see what happens. I personally would not use anything else than exhaust gases, since everything else to scoop and duct more air into wake will most probably create additional drag.
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