Sender: <marv@lancaironline.net> (Marvin Kaye)
To: lml
Date: Tue, 28 May 2002 09:20:24 -0400
Message-ID: <redirect-1249297@logan.com>
From: Sky2high@aol.com
Subject: Re: [LML] Re: 320 ventilation system sucks
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Bill,

I was too worn out yesterday to complete some details on how the E-racer 
solved his lack of vent air problem.  One was to introduce air exits in his 
aft cabin to let incoming air out.  Although this was an improvement, his 
additional problem was that the intake NACA was located in an area of dead 
air.  By placing 2 small vortex generators ahead of the NACA, the air flow 
was dramatically increased.  

Again, a Lancair should allow for adequate air exit thru the tunnel and 
elevator openings unless there is too much air coming in under the seats from 
the gear doors and too much leakage in the canopy seals.  Perhaps some 
tufting to see what is going on with the air ahead of the NACA and maybe even 
using relatively small vortex generators might make the difference.  If you 
are in an experimentation mode, and you have an "alternate static air" valve 
using cockpit air, you may want to open it at high and low speed flight 
(including gear down) and calculate the pressure differences from the change 
in indicated altitude.

Scott Krueger
N92EX