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Re: REFLECTOR: oil temp
Hi John, I have drop doors about 1" x 3" on each side of my Lycoming plenum (the
little penthouse area with the angled flat side facing the valve covers. The doors
are made of kevlar and a small piece of aileron hinge. Testing with a leaf blower
shows that they will blow close easily since a small bolt limits them to the
vertical position when open. This will vent the plenum and convection should do
To get air out of the top cowling a constructed a 10" wide 1/2" high 12" long
protrusion that starts about 2" aft of the cowl cut line and is shaped like the
Star Trek symbol. The front is a rounded point and the rear has an inverted V
shape. Underneath are a series of holes totaling about 5 sq. in. and far enough
forward that you can't see them. All sides but the rear gradually slope down and
fair into the cowl so drag should be very little.
john daniel cowan wrote:
> I was thinking about the same thing for an oil cooler exit door. aluminum
> rod which would
> be coiled like a thermostat, (calibrated in the oven with a thermometer
> across a 160-220 degree range), to automatically push open or pull closed an
> exit flap.
> At 01:30 PM 4/2/99 -0600, you wrote:
> >NMFlyer1@aol.com wrote:
> >> I was considering adding an exit type cowl scoop to my upper cowling (
> >> if needed of course). The prop should help pull the hot air through the exit
> >> scoop and get some circulation through the cowling. I'm not sure anyone has
> >> tried this yet, but it is simple, and causes no drag when up at cruise
> >> I'll let you know how it works out.
> >> Any other input in this area would be appreciated. I'd better get out
> to the
> >> hangar and back to sanding.
> >> Kurt Winker
> >> 173 FGE-4.3L Chev
> >Dear Kurt,
> >I was planning hinged doors top and bottom of cowl attached to heat
> >variable rods from and old VW. They elongate when hot and open the
> >doors and shorten to close when cooler(at cruise). Pros and Cons?
// James F. Agnew
// Tampa, FL
// Velocity 173 FG Elite ( http://www.VelocityAircraft.com/ ) under construction