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Old August 17th 11, 07:12 PM posted to rec.aviation.soaring
Brian[_1_]
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Posts: 399
Default Low test numbers on Standard Cirrus, what could it be?

I would think that a good portion of the error is that you have not
converted your Indicated Airspeed to True Air Speed. Of course has you
have mentioned you would need the air temp to do that accurately.