[DeTomaso] Predicted mileage at 200 MPH
Ken Green
kenn_green at yahoo.com
Wed Apr 4 17:25:08 EDT 2007
Was he running a monster motor with like two 1150 Holleys at well over 200 MPH? Maybe less than 33% efficiency?
Ken
"Visit ProvaMo.com" <pantera007 at sbcglobal.net> wrote:
Didn't Junior Wilson run out of gas during one Open Road Race attempt?
Something like 3 MPG? Jack DeRyke???
Chuck
Out of curiosity, I tried to estimate how much gas would be burned to travel
100 miles at 200 MPH assuming 500 HP is required to maintain speed. I came
up with:
1 HP = 42.21 Btu/min
so, 500 HP = 21,205 Btu/min at 100% efficiency energy conversion
but assuming 33% efficiency, 500 HP requires 63,615 Btu/min
1 gallon of gasoline contain 115,000 to 125,000 BTUs
at 120,000 Btu/gal, 500 HP will burn about 1/2 gallons per minute
so, at 200 MPH, it takes 30 minutes to travel 100 miles, and 15 gallons of
gasoline.
It seems reasonable, about 6 MPG. I've never done this kind of
calculation before, does anyone see an obvious error?
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