Message-ID: <40473F9A.8050502@netzero.net>
Date: Thu, 04 Mar 2004 09:39:22 -0500
From: Finn Lassen <finnlassen@netzero.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Ideal Cooling System Plumbing (was Re:  [FlyRotary]
 Re: overflow connections
References: <list-3062723@logan.com>
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Ed Anderson wrote:

>It is my opinion that a coolant pressure gauge is a better early indications
>of a leak rather than coolant temperature.  By the time your coolant temps
>start to climb (even if the temp gauge is reporting the condition accuracy)
>you are already in sufficient trouble that probably only turning the engine
>off and becoming a glider is going to save the engine from damage. The
>pressure gauge may provide an earlier indication as the system fails to
>pressurize (after engine start) or pressure starts to fall from levels
>normally seen for that stage of flight.
>  
>
Why wouldn't the pressure increase when water levels drop and steam 
develops?

I still think the best leak detector would be a water level sensor. 
Petty that the solid state one for fuel tanks is not designed to handle 
higher temps:
http://www.ppavionics.com/LFL.htm

Here's a mechanical that Rusty found earlier:

http://www.grainger.com/Grainger/productdetail.jsp?xi=xi&ItemId=1611587508


Finn