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All interesting stuff, Fred, however with all the obvious experience you
have with such things, you should also know that getting within 7 degrees (+
or -) of the true value is about par for the course with most of our GA
instrumentation anyway. That is, of course, unless you have one of those
"big iron" air data computers to make all the correstions for you.

On an average day - temperature somewhere between 50 and 90 degrees F - a 7
degree error at 200 Kts is about as good as one can expect - or need, since
even a good "Whiz Wheel" can't be set, or read,  much closer than 10%.

Besides, knowing the temperature, for instance to calculate density altitude
within 10%, is all that one should count on.

Sweat the big things - such as have I enough fuel, or more importantly, is
there an operating Biffy at the next airport - and leave the fly specks
where they just add flavor.

Dan Schaefer

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