Incidentally I found this
https://www.experimentalaircraft.info/homebuilt-aircraft/rotax-aircraft-engines-3.php
in the www. According to their "quick reference guide" the ideal CHT should be
75-110C.
However they also recommend to refer to the official Rotax manual, where I can't
find any CHT-limitation on the low side.
FWIW last monday I made two longer flights >1h at FL80 with OAT about -10C and
with my current setup I had 99C CHT and 96C oiltemperature.
Regards
Roland
PH-ZTI
XS TG 914
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