I finally completed my cylinder head temp monitoring system so now
I have 3 sites of measurement: Regular Rotax VDO probes into
the heads of Cylinders 2, 3 going to an analog gauge;
Ring-type CHTs installed under the Rotax CHT probes and monitored by
my Blue Mountain EFIS, and finally the Lockwood/Rotax coolant temp
probe with a Blue Mountain probe going into the EFIS.
So far, I have only done cowl-off, static testing but the results are
interesting:
The coolant temp at 4000 rpm is 20F higher than the Rotax/VDO
which is about 20F higher than the ring probes outside the block.
These will probably change when cowled and at cruise and climb which
I plan to test when I return from SnF.
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Ira N224XS
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