Linked by Kroc on Thu 30th Aug 2007 13:03 UTC
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RE[2]: Real, Fair Competition...
by tyrione on Fri 31st Aug 2007 02:29
in reply to "RE: Real, Fair Competition..."




Member since:
2005-07-24
"""
We have had engine designs for decades [Department of Energy commissioned more than one project of Turbine Engine Design contests] that meet a minimum of 80 MPG.
"""
What's the overall efficiency of the average automotive engine these days? When I was in school, 30 years ago, about 50% of energy from combustion went out the exhaust pipe. 20% was radiated by the cooling system. 5% went to mechanical friction. Leaving only 25% of the energy of combustion to actually deal with the mechanical friction of the car itself, and the wind resistance that so dominates once you get above about 50 mph or so.
Edited 2007-08-30 21:17