About a half a century ago Austin-Healy foolishly put the sensor in the
RADIATOR (!!!) so when the coolant leaked and the level dropped the gauge
reported a nice cool engine. The first clue of trouble was when the engine
seized after all the coolant departed. Don't trust a sensor anywhere but
within the block or very close to it.
Best regards,
Rob Housman
A070
-----Original Message-----
Behalf Of Kevin Taylor
Subject: Re: [Building] 2 items - service bulletins on Rotax
This raises and interesting thread.
My NSI has a water temp gauge.
In flight the water stays about 85 with the oil at 85. Do you think this oil
is hot enough? Looking under the cowl it appears there is a sensor on the
coolant tank but that is not connected and in use. I'm fairly sure the water
temp is read from the inlet manifold rather than the coolant tank anyone
want to guess why this maybe?
I didn't have any CHT readings and recently I bought a new digi gauge for
EGTs, as it had spare capacity I put a sensor on each cylinder head. It a
simple thermo pick up which looks like a washer and sits under the spark
plug.
Out of interest the sensor is still on the tank so I might connect it up to
my digi gauge to read what it says.
I tend not to let it get above 100. The yellow arc is 105-119 with the red
above 119. This is often difficult to manage especially after the first
flight of the day.
What it needs is a fan on the radiator like cars have so if I get stuck in
traffic I'm OK :-)Maybe a cowl flap might help!?
Regards
Kevin
-----Original Message-----
From: forum-owner@europaclub.org.uk
Subject: Re: [Building] 2 items - service bulletins on
Rotax
In a message dated 1/21/2003 11:26:29 AM Pacific Standard Time,
tonyk@kaon.co.nz writes:
> For anyone interested in measuring the coolant temperature, Skydrive in
> the UK make a neat little kit which adds a temperature sensor into one
> of the cylinder head coolant lines.
>
> I added a coolant temperature sensor to my engine (and increased the
> size of the overflow bottle outlet) immediately following Graham's
> accident as I felt that these would eliminate what was a major
> contributing factor to the accident.
>
> When you consider that every water cooled automobile engine has a
> coolant temperature monitoring system I am still amazed that Rotax don't
> have provision for the same on their engines.
>
Isn't cylinder temp esentially coolant temp, due to the liquid cooled nature
of the beast?
Dave
A227
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