REFLECTOR: Carburetor Heat Flap

[Carl Hoffman]

Okay, I stand corrected, there are 3 #4-40 screws. The hole is normal. It's there so the flap can move without back pressure.

I'm going flying today. I take some pictures of the screws and flap.

Carl Hoffman 

---- Original message ----
>Date: Tue, 23 Jun 2009 06:42:03 -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>
>
>That's interesting.  One of my 3 screws is missing.  The screen at the back of the
>scoop has a small hole in it.  The #6 cylinder that I just repaired had a bent exhaust
>valve.  Guess I will secure the screws with some silicone sealant.
>
>John
>
>"hoffman3 at erols.com" wrote:
>
>> When you look into the scoop with carb heat on you should see the heads of
>> 2 #4-40 screws holding the flap on the shaft. The shaft lever should be on
>> the Pilot Side.
>>
>> I remember this because years ago the 2 screws came out, and I lost power
>> for a few seconds after lift off. Found the heat flap resting at the bottom
>> of the box with no compression in #6 cylinder. I removed the cylinder and
>> had two new valves installed.
>>
>> Carl Hoffman
>>
>> Original Message:
>> -----------------
>> From: John Dibble aminetech at bluefrog.com
>> Date: Mon, 22 Jun 2009 11:39:53 -0500
>> To: reflector at tvbf.org
>> Subject: REFLECTOR: Carburetor Heat Flap
>>
>> Vibration is chewing up my carburetor heat mechanism.  I think the problem
>> is that the
>> flap is mounted off center on the pivot bolt with the longer side facing
>> forward
>> creating instability in the air flow.  I plan to reverse it so the longer
>> side faces
>> rearward.  The problem is that there is limited room with the reverse
>> orientation, so I
>> would like to mount the flap as close to center as possible, but not have
>> instability.
>> Any ideas as to how much longer the rear side needs to be?
>>
>> John
>>
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