Actually, Thomas back about 12 years
ago I purchased some of those VW ‘bellows” type expansion
servos that worked based on the temperature they sense. I had planned to
use them similar to what you suggested – but, got my cooling problem
under control by moving a RX-7 oil cooler under the nose and never proceeded
with the cowl flap idea. After 12 years and a move, I don’t even
have a hint where I might have stored them.
Not certain they are even available any
more.
Ed
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Thomas Mann
Sent: Friday, August 21, 2009 9:02
AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Cowl Flap
I have wondered if
there would be any advantage to using a set of those expanding bellows things
they have on a VW.
They use them to
control the amount of air passing over the fins on the cylinders.
I read somewhere
that a builder had incorporated them in his cowl to vent the area after
landing. Once things cool off they contract and close the vent.
I’m not sure
whether or not it would fit this type of application.
T Mann
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Bryan Winberry
Sent: Thursday, August 20, 2009
10:28 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Cowl Flap
Great concept Ed. Perhaps a spring
load biased to open position to ensure that the flap opens sooner as speed is
reduced.
Bryan
Passive, and no electricity required!
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