Subject: Sizing air scoops
From: ACRE NL
Date: 3/25/2002, 11:12 AM

Joseph Berki wrote:

Paul,

         Thank you for the information.  My idea was to adapt Charlie
Airesman's set up using exhaust augmentation cooling with a parallel  wall
submerged inlet.  Time to re-think this thing.

Joe Berki
Limo EZ

Charlie has only 100 HP or so and the augmentor helps in sucking
air through the rad. A long NACA EZ duct is not that much wider than a Variez.
Also he has trouble with oil cooling according to Klause who has flown 
besides him at the same speed.

The thing about cooling experiments is; gone wrong it can ruin your
whole outlook real fast. It is very very discouraging indeed to have your 
engine overheat on takeoff. Perry and I spent days tracking down 
cooling problems in Palm Springs. You just can't get the airplane back
on the ground fast enough. You can't generate the same conditions
you get in the air while on the ground. This makes it extremely difficult to
experiment with unconventional cooling systems. Unconventional cooling 
systems are best tested and instrumented  in the back of a 
fast moving pick up truck.

I am all for innovation but after you have it successfully flying and cooling. 

Paul Lamar
 
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