Hydroplaning

[Andrew Buc <abuc@ibm.net>]

Addressed to: "Gary Barry" <Gary.Barry@trw.com>
              Quattro List <quattro@coimbra.ans.net>

** Reply to note from "Gary Barry" <Gary.Barry@trw.com> Fri, 05 Jun 1998 11:57:29 -0700
>   
> There has been some discussion of hydroplaning as related to tires.  The
> following is taken from a letter to the editor of USAA magazine (United
> Services Automobile Association), latest issue:
>   
> "Hydroplaning starts when two conditions are met: The speed of the car
> is at least 9 times the square root of the tire pressure and the water
> depth is greater than the tread depth of the tire.

Since this is an American magazine, I assume that the formula is based on
tire pressure in psi and speed in mph? Just making sure! :)