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Date: Mon, 27 Jun 2005 00:27:34 -0500
From: Jim Sower <canarder@frontiernet.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Coolant Leak
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Add a little accumulator somewhere near the high point in the system. A 
cup would seem to be more than adequate. Aside from that, maintain your 
efforts to purge all air from the system (you CAN'T purge it form the 
accumulator.
Of course that *does* involve another footprint somewhere ... Jim S.

Echo Lake Fishing Resort (Georges Boucher) wrote:

> I'm sure this isn't news to the group, but that "cup" of air must be 
> (preferably in an expantion bottle) at the highest point in the system.
> Georges B.
> /-------Original Message-------/
> /*From:*/ Rotary motors in aircraft <mailto:flyrotary@lancaironline.net>
> /*Date:*/ 06/26/05 14:19:17
> /*To:*/ Rotary motors in aircraft <mailto:flyrotary@lancaironline.net>
> /*Subject:*/ [FlyRotary] Re: Coolant Leak
>
> The important thing is that; whatever the cause, the pressure 
> transient is apparently a non-issue. Certainly lines covered with 
> braided SS aren’t going to expand much, but they still have flexible 
> walls in there that do distort bit with pressure, as will the 
> thin-walled tank on a radiator. Clearly there is a hydraulic pressure 
> being transmitted through the cooling system. My guess is that the 
> cause is likely the immediate expansion of the inside walls of the 
> rotor housing (temperature and pressure) while everything else is 
> cool, followed closely thereafter by initial heating of the coolant. 
> Heat transfer through the rotor housing does not happen 
> instantaneously. It’s a guess, but hey; other than for mental 
> gymnastics, who cares?
>
> Al
>
>
> I agree, Al, inquiring minds at least like a plausible hypothesis and 
> I think the discussion has led to that. Perhaps I'll leave the "cup" 
> of air, just for peace of mind {:>)
>
> Ed
>
> 	
> 	
>