Posted for "Chuck Jensen" <cjensen@dts9000.com>:

 On the RVList it was reported (and confirmed by calculation) that if the
 probe is put in a ram air location, the heat of compression at 200 mph
 is something like 2-3 degrees, so it will be warmer than ambient.
 
 A venture would affect it the same but in the opposite direction.  A low
 pressure area will have a lower temp than ambient (which is why
 carburetors ice up at 50F.
 
 Wind chill won't come into play.  An absolute temperature of 40F is
 still 40F whether the air is calm or it is 150 mph.  Now, if you talking
 about taking your coat off in a blizzard, then wind chill (the rate at
 which you cool) will certainly come into play.  So wind chill is just a
 calculation (based on wind speed and humidity) of how fast an object
 will cool off, but this doesn't apply to the OAT sensor.
 
 Chuck
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