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Re: Hydroplaning, Air Force insight
James Marriott wrote:
> Sure. Both use rapidly-rotating machinery to move air in a manner that
> begets movement "that-a-way." Boost on, bruthas!
> '87 4kq, 0.9 bar
> '89 200q, 1.4 bar and climbing
> David L. Cooper wrote:
> > Can airplanes lend info to cars?
> > scott miller wrote:
> > > I also fly KC-135s full-time for the Air Force Reserves, and
> > > hydroplaning is a big deal for us. We're taught dynamic hydroplaning
> > > begins at approximately the sq root of tire press times nine, and water
> > > depth exceeding tread depth. My father learned the same when he started
> > > flying. We're both mechanical engineers and car buffs, and we know it's
> > > not exact, but it's a pretty good wag to know when you're approching
> > > danger. Our tires and most aircraft tires I've seen have just a few
> > > straight grooves, I've not noticed a rush to aquatreads to improve a
> > > very significant danger in the aviation world, so I assume tread design
> > > isn't a major factor in hydroplaning speed. Killing our lift by raising
> > > speedbrakes on landing helps add pressure to the rubber/pavement/water.
> > > I'm sure my car develops some front end lift at hydroplaning speeds, how
> > > much I don't know. I do know I have a lot less options when my car
> > > hydroplanes than my airplane.
> > >
> > > I could go on for a while about this and other forms of hydroplaning, if
> > > you're really interested in more, but I have a new hobby that's
> > > demanding my attention.
> > >
> > > Scott Miller
> > > Quattro owner for five days now
> > > '90 200q wagon
> > >
> > > ______________________________________________________
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