hydroplaning

[Doug Johnson]

Weight of car = Number of tires (4) X Contact patch area (square inches) X
pressure in tire (pounds / square inch) -->  Answer is in pounds (force)

The pressure pushing up on the contact patch (that's the force the ground
exerts to hold the vehicle up) is equal to the force pushing down on the
contact patch (pounds per square inch of pressure in the tire X square
inches of contact patch)

For example, if one tire is supporting 1,000 pounds, and you have 25 PSI in
the tire, the contact patch will be 40 square inches.  Put air in the tire
to get up to 40 PSI, and the contact patch will be reduced to 25 square
inches.  Or, 30 square inches at 33.333 PSI, and so it goes....Pressure
times area equals force.

HTH

~ Doug
 

> -----Original Message-----
> From: quattro-bounces at audifans.com 
> [mailto:quattro-bounces at audifans.com] On Behalf Of Kneale Brownson
> Sent: Thursday, May 27, 2004 4:41 PM
> To: audi at humanspeakers.com; mike
> Cc: Mike Arman; quattro at audifans.com
> Subject: Re: hydroplaning
> 
> Wouldn't a tire's pressure applied to the road depend upon 
> the weight of the vehicle?
> 
> At 06:23 PM 5/27/2004 -0400, Huw Powell wrote:
> >
> >> maybe they are talking about the pressure between the tyre and the 
> >> road rather than the pressure in the tyre...all starts to 
> make sense 
> >> then
> >
> >Those two numbers are exactly the same...
> >
> >--
> >Huw Powell
> >
> >http://www.humanspeakers.com/audi
> >
> >http://www.humanthoughts.org/
> >_______________________________________________
> >quattro mailing list
> >quattro at audifans.com
> >http://www.audifans.com/mailman/listinfo/quattro
> 
> _______________________________________________
> quattro mailing list
> quattro at audifans.com
> http://www.audifans.com/mailman/listinfo/quattro
>