REFLECTOR: Low CHTs

[Laurence Coen]

John,

I ran across something that struck me as a good candidate for an actuator. 
It was a linear thermal actuator used to open and close vent windows in a 
greenhouse.  After seeing CHT's below 200 F this winter on my #5 cylinder I 
plan to look into this problem a little more seriously.

Larry Coen
N136LC
SE/RG Franklin

----- Original Message ----- 
From: "John Dibble" <aminetech at bluefrog.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Wednesday, January 17, 2007 11:49 AM
Subject: REFLECTOR: Low CHTs


> This time of year my CHTs are low and my oil temp is also, making it 
> difficult to heat
> the cabin.  I'm thinking of putting butterfly valves in the engine cooling 
> inlets,
> similar to what is in my engine intake air for carbureator heat.  Rather 
> than run
> cables, I'm thinking of using a bi-metallic spring, like is used for 
> automatic chokes
> on cars to open and close the valves.  Ideally the spring would work off 
> of CHT, but I
> think this will be to complicated, so I think using OAT would be more 
> practical.
> Any thoughts whether this is a good idea?
>
> John
>
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