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Date: Mon, 01 Nov 2004 13:58:36 -0500
From: Mike Robert <pmrobert@bellsouth.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: idle adjustment
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Al Gietzen wrote:

> *Subject:* [FlyRotary] Re: idle adjustment
>
> I did think of one additional possible solution. Each of the barrels 
> on the TWM has a small air inlet with a pin. I have these closed all 
> the way because I thought it might help with the idle. However, I now 
> wonder if maybe that air inlet is for the purpose of atomizing the 
> fuel.... Does anyone know? Maybe I will try to open them up a little.
>
> Dave Leonard
>
> Dave;
>
> As I understand it, these just provide adjustable air bypass for the 
> throttle plate, and is primarily for more precise idle adjustment, and 
> transition coming off low speed idle; so may not be very relevant in 
> our application. It is probably good to have them open a bit. I have 
> mine set at 2 turns from fully closed.
>
> I haven’t asked to folks at TWM, so if you really want to know, give 
> ‘em a call.
>
> Al
>
That's pretty much it. They're usually used to balance the MAP at idle 
on 4 cylinder Brit engines - MG, etc. All they are is an adjustable air 
leak.