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To: flyrotary@lancaironline.net
Date: Fri, 13 Apr 2007 17:42:54 -0700
Subject: Re: [FlyRotary] Re: Coolant Level Probe - Will it work
Message-ID: <20070413.174306.264.2.alwick@juno.com>
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From: al p wick <alwick@juno.com>

When ever possible you should use analog sensors instead of discrete
(on/off). Analog sensors greatly improve your understanding. They allow
you to see the situation gradually change. 
I've got a great analog coolant sensor.  I tried to find it on the web so
that I could share the info with everyone, but every search I did came up
empty. Pretty rare to have google fail me. It's a capacitive probe from a
Freightliner truck. 
If you can find analog sensor, go for it. If not, discrete sensor is
better than nothing.


-al wick
Cozy IV powered by Turbo Subaru 3.0R with variable valve lift and cam
timing. 
Artificial intelligence in cockpit, N9032U 240+ hours from Portland,
Oregon
Glass panel design, Subaru install, Prop construct, Risk assessment info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html

On Fri, 13 Apr 2007 14:53:47 -0500 "Rogers, Bob J." <BRogers@FDIC.gov>
writes:
> Check out the sensor at this web page.
> http://www.aircraftextras.com/LowOilSensor.htm
> 
> It will work for water as well as oil.  You will need a surge tank 
> tied
> into your primary circulation system for it to work.  The sensor 
> would
> go in the bottom of the surge tank.  Something similar to what is
> described here:
> http://www.stewartcomponents.com/tech_tips/Tech_Tips_2.htm
> 
> 
> 
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] 
> On
> Behalf Of Dennis Haverlah
> Sent: Thursday, April 12, 2007 8:34 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Coolant Level Probe - Will it work
> 
> I have an optical liquid level sensor in my air/coolant 
> seperator/expansion tank.  It worked OK in tests.  After ground 
> testing 
> the engine for about one hour while auto-tuning and taxi testing, I 
> 
> drained some coolant out of the system to expose the coolant level 
> sensor to make sure it still worked.  It did not indicate low 
> coolant!  
> I removed the probe and found it had a scum deposit - when wiped 
> clean 
> it worked.  My engine came out of a 2004 RX-8 and had 9400 miles on 
> it.
> 
> My cooland is 60% distilled water and 40 % Prestone - yellow - 
> antifreeze.  I have not added any water-wetter but will check today 
> on 
> John Deer's product.  The coolant is always slightly cloudy.  The 
> engine
> 
> had some antifreeze in it when I recieved it and I flushed the 
> coolant 
> system.  I also changed the antifreeze after about 4 hours of ground 
> 
> operation.  Is there any solution - additive to keep the system 
> cleaner,
> 
> is there a better coolant level dector - or do I need to hire a scum 
> 
> cleaner to keep it clean??  I guess I could give up and just watch 
> the 
> coolant pressure for clues.
> 
> Thanks,
> Dennis H.
> 
> --
> Homepage:  http://www.flyrotary.com/
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> http://mail.lancaironline.net:81/lists/flyrotary/List.html
> 
> --
> Homepage:  http://www.flyrotary.com/
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> 
> 
 
 
-al wick
Cozy IV powered by Turbo Subaru 3.0R with variable valve lift and cam
timing. 
Artificial intelligence in cockpit, N9032U 240+ hours from Portland,
Oregon
Glass panel design, Subaru install, Prop construct, Risk assessment info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html