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brake down of coefficient of drag on a car.
The book Build Your Own Electric Vehicle (by Bob Brant) has a chart (page 138) with the amount of drag of each area of a car (done in the 1970's) it is as fallows:
body-rear 33.3%
Wheel wells 21.4%
Body-under 14.3%
Body-front 11.9%
Projections and indentations 7.1%
engine compartment 6%
Skin Friction 6%
yes, these numbers are a bit dated, but look, wheel wells are 21% of your drag, and under body is next, of course the rear is the biggest, and hopfully in the last 30+ years that has been improved a bit.
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