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Old 03-15-2011, 12:46 PM   #6 (permalink)
gone-ot
...beats walking...
 
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...page 9: ..."losses" at 80-95 mph:

90-95% internal hystersis
_2-10% friction between tire & surface
1½-3½% air resistance


...the first document is dated 1971, the second is dated 2005.
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