Quote:
Originally Posted by Hubert Farnsworth
Quick question, if the aerodynamic drag component is reduced how does this change the amount of power the engine is producing at a given vehicle speed? For example lets say the car has a cd of 0.33 and a gear ratio spread such that the car is turning at 3000 rpm at 68 mph an N/V ratio of 44.12 rpm/mph. The engine produced maybe 50 horse power at this point, if the aerodynamic loading used to require 40 hp at this point and the aerodynamics is improved such that it now takes less power how can this effect the engine speed at a certain vehicle speed? I can see it allowing for increased coasting, however the gear ratio is fixed and therefore for a fixed vehicle speed the engine produces a certain power output at a given throttle input, say around 50% load (ie its a 105 hp engine)
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Is this one of those "the answer is given in the question" type questions?