Reply-To: <steve@tsisp.com>
From: "Steve Brooks" <steve@tsisp.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: water temp sender
Date: Sun, 23 May 2004 08:43:32 -0400
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Ed,
I didn't try the stock sender.  I pulled those out and installed the senders
for my gauges.  As far as I know, the temperatures I'm reading should be
correct, or at least within the accuracy of the gauge.

Steve

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
Behalf Of Ed Anderson
Sent: Sunday, May 23, 2004 8:26 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: water temp sender


Interesting indeed.  Perhaps that or perhaps the gauge I had was not
compatible with the curve of the stock sensor there and Iwas not seeing the
correct temps..

Ed

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From: "Steve Brooks" <steve@tsisp.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, May 23, 2004 8:23 AM
Subject: [FlyRotary] Re: water temp sender


> Ed,
> That's interesting.  I'm seeing the exact opposite.  The temperature from
> the rear housing is about 20 degrees cooler than that from the water pump.
> Could it be because of your plugs up installation the sensor on the rear
> housing is at the top of the engine, i.e. heat rises, hottest spot ?  My
> water pump is at the top of the engine...maybe hottest spot.  With a 20
> degree difference, I want to make sure that I'm measuring at the right
> point.
>
> Steve
>
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
> Behalf Of Ed Anderson
> Sent: Sunday, May 23, 2004 7:54 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: water temp sender
>
>
> Steve, I have found the coolant sensor on the rear housing to also measure
> higher temperatures.  My normal coolant sensor is at the thermostat and
you
> would think that would be measuring the hottest part of the coolant (after
> its made a trip from the pump to the rear housing and back to the
thermostat
> opening), but when I connected a temp gauge to the rear sensor it measured
> hotter.  Perhaps because it is on the side of the engine where the spark
> plugs are (and the metal nearest the spark plugs gets the hottest) but as
it
> joins the rest of the coolant flow back to the thermostat its peak temp
> lowers somewhat as it distributes it to the rest of the flow.  Just a
guess
> of course.
>
> Ed
>
>
>
> Ed Anderson
> RV-6A N494BW Rotary Powered
> Matthews, NC
> ----- Original Message -----
> From: "Steve Brooks" <steve@tsisp.com>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Sunday, May 23, 2004 7:43 AM
> Subject: [FlyRotary] water temp sender
>
>
> > I now have another question.  Since I found out that I'm measuring water
> > temperature twice, and not measuring oil temperature at all, now I have
> > another issue.
> > I getting about a 20 degree difference between the two coolant temps.
> >
> > My coolant temp gauge sender is mounted in a port that was in the back
> side
> > of the water pump housing.  As I recall, it's in the vicinity of the
> > thermostat somewhere.
> > The other temperature reading is from what I though was the oil
> temperature
> > port which is next to the oil pressure port, but turns out to be
coolant.
> > If that is the right place to measure coolant, then I'm kind of happy
(not
> > about being stupid about oil temp) that the coolant temperature is much
> > lower than I previously thought.
> >
> > Also I wonder about why such a big difference ?  The only thing that I
> could
> > think of is that one is on the outlet side of the radiator, and the
other
> is
> > on the hot side coming out of the engine before it goes to the radiator.
> > Since I have no clue about where the coolant comes from that I'm
measuring
> > next to the oil pressure sender, I really don't know.
> >
> > BTW My water temperature gauge is a VDO Vision series analog gauge, and
> the
> > oil temperature / pressure is a Aerospace logic digital display.  The
Aero
> > Logic is suppose to be accurate to within 1 degree, so I know that
> > temperature is pretty accurate.  The analog gauge really doesn't say
what
> > its' accuracy is, so I guess that you can only ASSUME it's correct.
> >
> > So, where should I be measuring coolant temperature ?
> >
> > Steve Brooks
> > Cozy MKIV N75CZ
> > Turbo Rotary
> >
> >
> > >>  Homepage:  http://www.flyrotary.com/
> > >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
> >
>
>
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html


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