With the efficiencies of gasoline engines being around 25%, MOST of the
energy goes out the exhaust......or out the radiator.
I was under the impression that low speed "road" horsepower was RATHER
low, ie around 10 hp or less. I'll take a look at some tire data from
Goodyear on racing slicks we used on our SAE Fornula car......but from
memory for their 7x20-13 (7" wide, 20" OD for 13" wheel) @ 15 psiwith a
400 pound load had a rolling resistance of 15 pounds.
But since this is waaay off the original topic, I'll give my own theory
on the reason for few rubber bumpered GTs......
Geez, who wants a rubber bumpered car?
On Fri, 28 Jun
1996 Simon.MATTHEWS@st.com wrote:
> The increased load on the engine comes from increased rolling
> resistance (as well as the extra energy required to accelerate) -- ie.
> the amount of energy required to turn the tyres given the weight they
> are carrying. When cruising below about 50mph, most of the gasoline
> you use is devoted to this task!
>
> Rgds,
> Simon
>
>
>
Eric L. Van Iderstine
Mississippi State University .....ALUMNI.......!!!!!!
elv1@Ra.MsState.Edu http://www2.msstate.edu/~elv1
74 MGB
96 Formula SAE
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