aquaplane

[Blended-winglets]

Could someone kindly provide calculation for aquaplane speed of aircraft.

[Billy the Kid]

I think its 9 times the square root of the tyre pressure.
But it could be 1.25 x square root of the tyre pressure x 9.

So always check the tyre pressure before you fly if it is raining

[A Very Civil Pilot]

9 x sq root tyre pressure (in psi)

[Royan]

Blended Winglets: - this subject was discussed before, and here is the link for you hope it will answer your question. It is a very interesting subject. http://www.pprune.org/ubb/NonCGI/For.../001327-2.html
The link is to page 2 Have a look at page one

[This message has been edited by Royan (edited 08 April 2001).]

[Crash & Burn]

A page with a good explanation can be found at:

http://www.aviationshop.com.au/avfac...ydro/index.asp

You'll need to click the 'click here for free access' bit and get a user id and password but it's well worth it.

There are plenty of other interesting topics by the same guy at:

http://www.aviationshop.com.au/avfacts/editorial.htm

[Blended-winglets]

Thanks for the responses.

[Pub User]

As an aside, a distant acquantance of mine was asked at interview (Virgin) what the 3 types of aquaplaning are. He hadn't a clue, and admitted as much, I'm the same.
Any ideas out there?

[Luftwaffle]

Dynamic - high speeds, standing water
Viscous - lower speeds, smooth surface, thin film of water
Reverted rubber - locked wheels

The formulae I learned were slightly differnt than quoted above, so:

7.7 * sqrt (tire pressure) for a non-rotating tire (i.e. during landing)
9.0 * sqrt (tire pressure) for a rotating tire (i.e. during take-off)

Was it an American interview? The Americans LOVE hydroplaning questions.