Apologies!
I forgot that sharing graphics on the net was out..... For
anyone who wants a shot of the shape, I'll send discretely.
Ferg
----- Original Message -----
From: "Fergus Kyle" <VE3LVO@rac.ca>
Subject: Europa-List: Ventilator
|
| 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.
|
|
|
|
|
|
|