The Traffic Accident Reconstruction Origin -ARnews-

Re: Codfficient of Friction of Grass

Wilt Nelson ([email protected])
Fri, 2 Oct 1998 20:17:50 -0400 (EDT)

Why wasn't a full scale test made on the grass in question? This is a simple test made with any car, it doesn't have to be high speed. But measure the speed with the radar (nearest MPH) when brakes are hit. Drop something out the window at some time to mark spot and measure skid distance. Then use V=�30fD or f=V*V/30D to solve for f.
0.75 is awful high for grass. And if you read the previous stuff on drag sleds you will reach the opinion that they aren't worth the money to make or buy.
Wilt

Wilt Nelson
[email protected]

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