Interesting data!
On my bird there are ring probes under the spark plugs, and one Rotax cht probe
is in use. The ring probe on #3 indicates about 15 C higher as the Rotax probe.
Since oil- and coolant temperature are coupled in the oi-water heat exchanger,
i am using the oil temperature as coolant temperature indication. All the
temperatures are within 1 degree when the engine is cold. If the engine
pre-heater
is on and the cowl under it's blanket, all temperatures are again within
1 degree of about 50 C.
My concern is in flight, especially on low power, like 55%, the front ring
terminals
are around 60 C, and the hottest rear is around 100, with 95 C for the other.
Oil will typically be 85 to 90 C That's with an OAT of -5 to -10 C. My next
move is to temporarily block the standard air cooling openings and see if
the Rotax shroud and it's intake will produce a more even picture. And then hope
for acceptable results in the hot summer.
Regards,
Jos Okhuijsen
Visit - www.EuropaOwners.org
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