Quote:
Originally Posted by markweatherill
I've wondered for a while about exhaust gases.
Is there enough exhaust gas to make a difference in a car's aerodynamics?
Would pointing the tailpipe in a particular direction have an effect?
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Hoerner reported that the Messerschmitt Me 109,at 380-mph,at say,90% power,enjoyed 250-pounds of thrust from the engine exhaust.
It's the only citation I've seen in 40-years which actually quantified such a thing.
NASCAR,while having the potential to benefit from this sort of thing,specifies a side outlet so that following drivers aren't exposed to the undiluted exhaust while drafting.