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Originally Posted by brewtoo
Very good. Most people don't realize this. However, I was taught that when the speed doubles, the force of the wind quadruples (X4, not X5).
Also, does your car require WOT at 70MPH? If so, wouldn't 70MPH be your top speed?
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This is true for force not power. When speed doubles force quaduples (or is actually squared 2^2 = 4),. Aerodynamic force, or more acuratly drag, is a function of speed squared. But power is drag times speed. Therefore power is a function of speed cubed.
Its somewhat scary isint it. The good news is that drag is so small at low speeds that it is off the map. But above about 40 mph its all drag and it comes on quick.
John Roncallo