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

Paul,

Would a wind tunnel be feaseable here ?  Is it something which could be
constructed in one's garage ?

Tom Warren
   Sonerai I
    N50TW

I think to scale a radiator would be very very difficult. The big problem
is getting the air to go through a rad using a NACA duct. NACA, the inventors
of the NACA duct and the guys that that know most about it say it is
not recommended but hey! What do they know? They could be out to lunch.
We have some people around that are a lot smarter than they are and
they think they can make it work with just a few simple vortex generators.
I would love to see some one mock this up full scale in the back of a pickup
truck and instrumented it with a water manometer. I will fly to wherever 
in the world they are and help them take the data.

Also if someone has a NACA duct and they claim it is working
fine and instrumented with a water manometer I will fly there and 
help them take the data.

Paul Lamar
 
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