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From: "rijakits" <rijakits@cwpanama.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-1030254@logan.com>
Subject: Re: [FlyRotary] Re: NACA's, Cooling and Sport Aviation Mag..
Date: Sat, 11 Mar 2006 00:06:02 -0500
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Guys ( and girls, too :),

check out this site: http://www.ez.org/feature/F0502-1/F0502-1.htm

This VariEze runs most of the cooling based on low pressure produced by
Exhaust-Augmenter. The intake looks like a very small NACA. According to the
original text this is exactly what a NACA likes.
So if you get the pressure behind the cooler low enough the NACA will supply
enough air.
I suppose even with a streamline-diffuser (84% revocery of pressure).
Question is with what pressure to you start out? Ambient? To what baseline
to you recover the 84%?
If the differential pressure is low enough - this obviously works fine!
Next question: How can one calculate/computer analyze/test all different
variations efficiently before starting to cut metal (or sticking glasfibers
together....)?

On the particular plane above, also observe the rather "big radius"-nose
compared to other "slicker look"-pointier noses of Eze siblings. The man
says research shows his noseform is the right one until you hit trans-sonic
speeds.....

Anyone knows a source for reports on the difference between NACA-low
pressure cooling systems versus Ram pressure systems? The real interist
thing would of course be the Drag-difference at the same cooling
results.....

Thomas J.