Return-Path: Received: from relay03.roc.ny.frontiernet.net ([66.133.131.36] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3063796 for flyrotary@lancaironline.net; Thu, 04 Mar 2004 18:59:58 -0500 Received: (qmail 7193 invoked from network); 4 Mar 2004 23:59:58 -0000 Received: from unknown (HELO frontiernet.net) ([170.215.99.215]) (envelope-sender ) by relay03.roc.ny.frontiernet.net (FrontierMTA 2.3.6) with SMTP for ; 4 Mar 2004 23:59:58 -0000 Message-ID: <4047C2E5.6F225DD5@frontiernet.net> Date: Thu, 04 Mar 2004 17:59:33 -0600 From: Jim Sower X-Mailer: Mozilla 4.77 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Ideal Cooling System Plumbing (wasRe:[FlyRotary]Re:overflow connections References: Content-Type: multipart/alternative; boundary="------------B2BB7A8DF00BFAC4B3B59546" --------------B2BB7A8DF00BFAC4B3B59546 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit <... Obviously is going to take some testing and trial and error ...> How would one test a fluid coolant indicator? Fly around for a while and then dump some coolant over the side and see if the warning light goes on? Create a small leak to see if the pressure gauge actually does indicate a problem before temperature rises or fluid gets too low? The trial part could get pretty dicey. Now, what about the error part? Who's gonna' be your test pilot? Can I watch? :o) .... Jim S. Finn Lassen wrote: > Jim Sower wrote: > > > <... Why wouldn't the pressure increase when water levels drop and > > steam develops? ...> > > Need to work backwards on this one. If the water level drops, one > > would deduce that it happens for a reason, and a leak comes > > immediately to mind. When the cooling system starts leaking, the > > pressure drops off substantially quite a while before any significant > > drop water level. > > I don't agree. A minor leak (pin hole) will not cause a significant > pressure drop. Sure, loosing the cap or a hose the pressure will drop. > > > FIRST the pressure drops precipitously, and THEN the coolant level > > starts to go down ... FINALLY the temps start to rise (provided the > > temp sender is submerged in what water remains). > > > > If you were to use a coolant level indicator, where would you put it? > > > Yes, that is a tough one. Somewher in the upper part of the pump > housing. The whole idea is to get an early warning - must be able to > loose more coolant before pump stops pumping, so you can make it to the > nearest airport without frying the engine. > > > Not in the block, because Ed has established that what coolant > > remains is relatively well distributed in the block. In the expansion > > tank? I would suspect you'd get a lot of "false negatives". I don't > > know where I'd put one, or how much to trust it. > > > > Just a theory .... Jim S. > > > Obviously is going to take some testing and trial and error. > > Finn > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html -- Jim Sower ... Destiny's Plaything Crossville, TN; Chapter 5 Long-EZ N83RT, Velocity N4095T --------------B2BB7A8DF00BFAC4B3B59546 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit <... Obviously is going to take some testing and trial and error ...>
How would one test a fluid coolant indicator? Fly around for a while and then dump some coolant over the side and see if the warning light goes on? Create a small leak to see if the pressure gauge actually does indicate a problem before temperature rises or fluid gets too low? The trial part could get pretty dicey. Now, what about the error part? Who's gonna' be your test pilot?

Can I watch? :o) .... Jim S.

Finn Lassen wrote:

Jim Sower wrote:
> <... Why wouldn't the pressure increase when water levels drop and
> steam develops? ...>
> Need to work backwards on this one. If the water level drops, one
> would deduce that it happens for a reason, and a leak comes
> immediately to mind. When the cooling system starts leaking, the
> pressure drops off substantially quite a while before any significant
> drop water level.
I don't agree. A minor leak (pin hole) will not cause a significant
pressure drop. Sure, loosing the cap or a hose the pressure will drop.
>   FIRST the pressure drops precipitously, and THEN the coolant level
> starts to go down ... FINALLY the temps start to rise (provided the
> temp sender is submerged in what water remains).
>
> If you were to use a coolant level indicator, where would you put it?
>
Yes, that is a tough one. Somewher in the upper part of the pump
housing. The whole idea is to get an early warning - must be able to
loose more coolant before pump stops pumping, so you can make it to the
nearest airport without frying the engine.
>   Not in the block, because Ed has established that what coolant
> remains is relatively well distributed in the block. In the expansion
> tank? I would suspect you'd get a lot of "false negatives". I don't
> know where I'd put one, or how much to trust it.
>
> Just a theory .... Jim S.
>
Obviously is going to take some testing and trial and error.
Finn
>> Homepage: http://www.flyrotary.com/
>> Archive:   http://lancaironline.net/lists/flyrotary/List.html

--
Jim Sower ... Destiny's Plaything
Crossville, TN; Chapter 5
Long-EZ N83RT, Velocity N4095T
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