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Perry Mick wrote:
> A - Burt Rutan started out with a P-51 style scoop
on the
>Vari-EZ. IIRC the early Long-EZs also had them. He later
>changed to the NACA scoop because it was more "efficient" in
>some combination of cooling efficiency vs. drag.
Burt Rutan never put a NACA scoop on the Long-EZ. You would have to
go look at the old canard pushers to see who was the first to do
it, I don't remember. But it was an "aftermarket" idea that was
very widely copied. Whoever it was sold plans I think. It became
the norm and Puffer copied it on the Cozy IV.
>I know Burt's Long-EZ had a P-51 scoop. Perhaps Burt
didn't initiate it,
>but IIRC my Long-EZ plans incorporated it. It's
been so long that I'm not
>positive, but I'm pretty sure.
It was never in the plans, and I don't even think RAF sold the plans
for it.
But it was discussed in the Canard Pusher. It was an add-on to the
belly of
the Long-EZ. I borrowed the template from another LEZ builder so that's
why
I don't remember who sold the plans. I could easily remove it from
mine, and
probably will if I ever have to take the engine off and build my new
engine
mount design. I have not had the engine off in over 4 years and over 350
hours.
>What I AM
positive about is that NONE of the speed merchants use the P-51
>scoop
and many use downdraft.
You are probably correct! However they are 99% air-cooled installations.
The most successful speed merchant I can think of with water cooling is
Spencer LEZ with the Ford V8, doing around 240 mph. I think he might
have
a P51 scoop.
Perry
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