REFLECTOR: Carburetor Heat Flap

[Carl Hoffman]

You need the ducting to collect heat from close to the exhaust and take it to the heat box via the flap. You need enough heat to show a drop in rpm during engine run up.

Carl Hoffman

---- Original message ----
>Date: Tue, 23 Jun 2009 06:46:09 -0500
>From: John Dibble <aminetech at bluefrog.com>  
>Subject: Re: REFLECTOR: Carburetor Heat Flap  
>To: hoffman3 at erols.com,Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
>
>My carb heat air comes from ducting wrapped around the exhaust.  Is this necessary, or
>can I just use air in the engine compartment?
>
>John
>