Received-SPF: none
 receiver=logan.com; client-ip=68.230.241.38; envelope-from=dale.r@cox.net
From: Dale Rogers <dale.r@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: cooling system air cushion (was: Coolant Leak)
Date: Sun, 26 Jun 2005 17:21:11 -0400
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Message-Id: <20050626212111.TLDV18672.fed1rmmtao01.cox.net@smtp.west.cox.net>

Hi All,

   I know John was cracking a funny, but - in all seriousness 
- don't we already _have_ a solution to this?  

   Maybe I'm overlooking something (and if I am, I'm *certain* 
that someone will happily correct me), but isn't the air 
cushion part of the job of the swirl pot / expansion tank?
It traps any air in the system and holds it above the level 
of the engine block.  Then, when the pressure exceeds the 
cap rating it vents the air (and eventually, maybe some 
coolant).  In most systems I've seen, the venting goes into 
overflow bottle, such that - when the engine cools - first 
it sucks back in the water pushed overboard; then it replentishes 
the air cushion.  

   So, with a properly located swirl pot, one fills to about 
1 - 2" below the cap, just as with an older (1950's) automobile radiator.  Right?

Regards,                     
Dale R.                              (___
COZY MkIV-R13B #1254          |----==(___)==----|     
Ch's 4, 5, 9, 16 & 23 in progress   o/ | \o

   

> 
> From: "John Slade" <sladerj@bellsouth.net>
> Date: 2005/06/26 Sun PM 12:43:00 EDT
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: Coolant Leak
> 
> That's excellent input, Al. I appreciate it.
> 
> Now I have one remaining question.....
> 
> How do I get the cup of air IN THERE?
> 
> I measured out a cup precisely using my wife's kitchen measuring thingy and
> poured it in, but it just spilled all over the engine. :)
> Regards,
> John
> 
> 
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>