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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. Mark S. -----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. 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. Mark S. -----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
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
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