Quote:
Originally Posted by aerohead
It's not fruitful to compare aircraft and automobiles.
Aircraft drag is governed by skin friction.
Automobile drag is governed by longitudinal pressure differentials.
Although I don't have the reference in front of me,I believe Volkswagen's ARVW of 1982 gets similar mpg at similar velocity as the Cessna.
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My apology to VW.Their 1982 Aerodynamic Research Volkswagen (ARVW) got :
*17 mpg at 225 mph
*39 mpg at 155 mph