[DeTomaso] Predicted mileage at 200 MPH

[Mad Dog Antenucci]

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md
Ken Green <kenn_green at yahoo.com> wrote:
  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? 

Ken 
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Mad Dawg Antenucci 
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