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Date: Fri, 21 Oct 2005 11:42:51 -0500
From: Jim Sower <canarder@frontiernet.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] NACA Scoops
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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.  What I AM positive about is that 
NONE of the speed merchants use the P-51 scoop and many use downdraft.