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Subject: Europa-List: Ventilator
From: Fergus Kyle <VE3LVO@rac.ca>
Date: Thu, 3 Nov 2005 15:00:40

I dredged this from long past records (the attached URL is long gone), but 
intend to research the utility of it when airborne. The quality of the 
photos is poor, but the principle is clear. Photo1 is a copy of a 
long-defunct URLsite; Photo2 is my adaptation, made from a Clark Y airfoil 
rotated 12 degrees to present what is hopefully an ideal shape to maximise 
out-draft . I have a drawing somewhere............ and have built and tested 
a copy in the auto window - it works well at 50mph.
Cheers, Ferg
PS:  The purpose was to draw air backward from the cockpit with a 
controllable flap to regulate the flow - in order to increase airflow but 
not reduce a positive pressure in the cockpit. The latter reason is to 
prevent inward flow of air through the throttle stand slots (Throttle, 
choke, brake, gear) and thus make less susceptible to smoke or noxious fumes 
forward.
I expect to duct (2inch) from rear bulkhead to the form in the rear of the 
aircraft somewhere, as I say with a rotating flap operated from the seat to 
control the effect. 



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