"charles krin" wrote in message

On Fri, 03 Oct 2003 17:56:05 GMT, "Gord Beaman"
) wrote:
"Brian Sharrock" wrote:

Now, go and check your tire pressures before the next rain shower.

Yep that's right...we used to use "nine times the sq root of the
tire pressure" for the onset of hydroplaning, which is about
right...you ever think about where a steel wheel rolling on a
flat steel surface will hydroplane?...

follow ups trimmed...
I doubt that the rail road rolling stock has much problem with
hydroplaning...

It actually is a serious consideration when the rails are underwater,
as happens frequently out here in the Plains when we get heavy rain.
Engineers have to be aware that it's going to take longer than usual
to come to a stop.