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From: Dale Rogers <rogersda@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Quiet
Date: Sun, 19 Sep 2004 11:57:37 -0400
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> From: Perry Mick <pjmick@viclink.com>
> Date: 2004/09/19 Sun AM 01:50:35 EDT
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: Quiet
> 
> >   Bulent Aliev wrote:
> >
> >>On 9/18/04 5:57 PM, "Dale Rogers" <rogersda@cox.net> wrote:
> >>
> >>  
> >>
> >>>John Slade <sladerj@bellsouth.net> wrote:
> >>>
> >>>[ Lynn Hanover]: 
> >>>    
> >>>
> >>>>>Water temp 180 at cruise hot day climb 200. Oil temp 160 (ideal)
> >>>>>at cruise, 180 is OK, 210 hot day climb. Power goes down above 160 oil
> >>>>>temp.
> >>>>>        
> >>>>>
> >>>>I've told by another well respected rotary expert that the REW is designed
> >>>>to run at 203 - 212F, that oil temp should be kept below 240F, and should
> >>>>never regularly go over 248F. Everywhere I go I hear different numbers for
> >>>>these limits. I'm using 5-30 Castrol Synthetic.
> >>>>      
> >>>>
> >>>John, 
> >>>
> >>> One aspect of the disparity is the problem of where to
> >>>measure the oil temp.  Mazda does it at the oil pan.  I
> >>>believe that Lynn is doing it at an adapter block where
> >>>the oil returns from the cooler to the rear housing.  It's
> >>>going to be cooler there - and more relevant to the temp.
> >>>at the bearings. 
> >>>
> >>>Dale R.
> >>>
> >>>    
> >>>
> >>
> >>Dale, Mazda does not measure oil temperature anywhere. The cars don't have
> >>oil temp. gauge. Only thing in the pan is low oil level sender.
> >>Bulent
> >>
> > True and false.
> > There is a temp sensor in the oil pan. However, it's a "low" temp sensor.
> >
> > Finn
> 
> It's a switch to turn on a sub zero start assist system. Doesn't go to 
> the ecu or the instrument panel.

Perry,

   Thank you.  I thought I had a genuine mystery developing 
there.  Since I have only an engine, and not a whole car, 
it's not always easy to figure out what individual 
components do - except by finding them in the wiring 
schematics. 

   The Haynes manual identifies the sensor as an "oil thermo 
unit".  Since that manual identifies the water temp sensor 
as a "water thermo unit", I concluded that the "mystery 
device" was an analog temperature sensor.  After Buly 
responded, I started searching through the schematics in 
both the Haynes and Chilton manuals for what it fed.  So 
far, I've not been able to find a single reference to it.
I'll go look for something that mentions the cold start 
circuitry (I did see "plumbing" for that mentioned.)

Dale R.