Rotax 914?
> >>
>I was told that CHT is essentially coolant temp and consequently was not
>planning to monitor water temp. But I can easily add this to my engine
>monitor if I locate a sensor somewhere in a coolant line.
>Troy
Not really. Temp varies a lot over the cylinder heads, hot near the
exhaust, cooler near the inlet. I would suggest the best place to measure
coolant temp is the swirl pot, just downstream of the cylinder heads.
Teh important thing is to have a warning when the coolant gets close to
boiling, say 120 deg C if you have gone to 50/50 glycol water. PFA are now
recommending 80/20 which will give you 170 ish boil at 1 bar overpressure,
only 130 at atmospheric pressure.
If someone could do a test for us, measure coolant temp at start of take
off on a hot day, then again at 200 feet, I suspect we might get an
unpleasant surprise.
Graham
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