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From: "Bryan" <bhcishere@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-395632@logan.com>
Subject: Re: [FlyRotary] Re: Water pump problem
Date: Mon, 6 Sep 2004 13:45:02 -0700
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Steve,

My best guess for the tube in the core is to pick up oil that may accumulate
in the core when used for air conditioning.  Since in the auto installation
the tubes are both at the top, it needs a way to return oil to the
compressor.

It sounds more to me that you may have air trapped in the cores (did you
bleed the cores?) or possibly cavitation at the pump.

Just my $.02.  Been working on cars and occasional racing for most of my
life.  By the way, I would never run without a thermostat or some type of
restrictor plate.  This leads to cavitation at the water pump.  With your
small lines and no restrictor plate this is a possability.

Bryan (lurking to learn about rotaries in aircraft.  About 2 years from
being there myself)

> Jesse,
> That probably depends upon the design of the core.  In my case it had to
> have both inlet and outlet on top of the core.  The cores I used also had
> both fitting on top.  Probably explains why they had a tube inside the
core
> on one end though.
>
> Steve
>
>
> Isn't it usually more sensible to run coolant in either top or bottom of
> condensor/cooler and exhaust out of other end, just to sort of eliminate
> these kind of problems ?
>
> jesse farr
>


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