I had a telephone conversation with Ray Richardson of Power Sport about
a few things. He mentioned that the new MT electric 
variable pitch prop they bought could not change pitch fast 
enough to keep with the acceleration of the 210 HP rotary
powered RV6A. At least I think that is what he said. This is 
something we need to consider with our own ACRE NL variable 
pitch design. Perhaps we need a higher HP electric motor.

BTW The P.S. RV6A is not cooling yet :-) IMHO it won't until
they use cold air for the rad instead of hot, under the cowl air.
The air comes in the scoop and flows over the engine and hot exhaust
before going through the rad.

Worst case scenario: The under the cowl air is 200 degrees
F. In that case there will be *** NO *** heat transferred between the rad
and the air. Obviously if the under the cowl air is 150 degrees
the heat transfer is much less than if it was only 100 degrees
or ambient temperature. Come on Ray... duct that rad :-)

You don't have a whole lot of time before the Apple Valley to
Copper State race in Oct. It is real hot down in here in the 
desert even in October and you might have to fly low in case of 
head winds.

Paul Lamar
 
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