Thanks to Kevin Horton in the RV group who looked this up:
COmpression heating or ram air heating can be calculated as:
TAS in kt, and temperatures in deg C:
IOAT = OAT + ((K * TAS^2)/7592)
OAT = Outside air temperature
IOAT = indicated OAT (i.e. the value you actually see on the OAT indicator)
K = OAT probe recovery factor - usually somewhere between 0.8 and 1, if the
probe
is truly stuck out in the airflow.
Therefore, in a Europa. don't expect more than about a 2C change in OAT
reading. At 200 kts, expect roughly 4C
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Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=431724#431724
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