----- Original Message -----
From: <DELTAFLYER@prodigy.net>

> Tracy,
> Is this ASI method useful for measuring pressures on
> the ground as well as while flying?
> I'd like to be able to optimize the cooling
> effectiveness (of the prop) on the ground before even
> beginning taxi testing.
> Thanks,
> Jim

Yes it will work on the ground as well but I must emphasize that I think it
is a mistake to concentrate on ground cooling.  This has almost no relation
to in-flight cooling (or at least it shouldn't).  If you DO manage to design
a cooling system that will cool at full throttle on the ground, it is
probably a disaster in terms of cooling drag while in-flight.
 I understand the desire to not fly untill you know it will cool in flight.
That is why I would suggest the use of spray bars in front of the heat
exchangers if you are in doubt.   A couple of gallons of water and a
windshield washer pump will keep the engine cool under almost any
circumstances giving you the chance to get the plane back down without
worring about burning up the engine.  This doesn't have to be a fancy system
since it is only for test.  I spent about 30 minutes installing mine.

Tracy