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Subject: RE: [FlyRotary] Re: Water temp sender
Date: Wed, 2 Feb 2005 15:28:37 -0600
Message-ID: <87DBA06C9A5CB84B80439BA09D86E69EC07EE6@MAIL01.austin.utexas.edu>
Thread-Topic: [FlyRotary] Re: Water temp sender
Thread-Index: AcUJbBq5+AJrlBUoR4K172/8414MHgAAQ0sA
From: "Mark R Steitle" <mark.steitle@austin.utexas.edu>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

George,
I assume you're asking about the dual oil temp senders.  I haven't flown
yet, but during ground runs I typically see about a 25 degree F temp
difference.  I'm using a Fluidyne oil cooler like those recently
discussed on FlyRotary.  I'm hoping that this will help me diagnose any
cooling problems that I may experience early on.

I may take Tracy's suggestion and use one of the CHT thermocouples to
monitor the coolant temp returning from the radiator to see how well its
working. =20

Mark S.  =20

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of George Lendich
Sent: Wednesday, February 02, 2005 3:15 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Water temp sender

Mark,
How well does it work?
George ( down under)
> Buly,
> My 2 cents...
> My water temp sensor is in the thermostat housing (thermostat has been
> removed).  That is the location that represents the coolant temp after
> making its way through the entire engine, prior to being cooled by the
> radiator.  This makes sense to me as it tells me how close to boiling
> I'm running.  I think the location next to the oil filter pad will
give
> you an abnormally high reading as it is located just after the coolant
> passes the combustion sections of the engine.  My 20B came with that
> port plugged.  It also seems like it will provide somewhat meaningless
> information as the coolant is not done with its task until it exits
the
> engine.=20
>=20
> Oil temp is just the opposite situation.  As I understand it, the oil
> temp limits are set for incoming oil, not max internal oil temps, so
as
> to keep the oil going to the bearings from getting too hot and
damaging
> the bearings.  As I understand it, the oil that is sprayed into the
> rotors for cooling gets much hotter, but that's ok as long as you
don't
> exceed the oil's maximum temp capability (hard to do with synthetics).
> So, you want to know the oil temp going into the engine so that you
> don't exceed the oil temp limits.  For diagnostic purposes, I have
> installed oil temp sensors at the engine outlet (front cover) and
return
> (oil filter adapter).  I can see how well my oil cooler is working at
> various OAT and speeds.   =20
>=20
> Mark S.=20
>=20
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
On
> Behalf Of Bulent Aliev
> Sent: Tuesday, February 01, 2005 8:45 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Water temp sender
>=20
> I use the water temp. sensor location next to the oil pressure gauge.
> Where
> is the best recommended place? I was thinking of taping one of the OAT
> sensors to the alum. water pipe coming from the pump? Any opinions?
> Buly
>=20
>=20
>=20
>=20
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>=20
> >>  Homepage:  http://www.flyrotary.com/
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>=20
>=20


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