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
>
>
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