Hartzell prop hub AD 2006-18-15...results and our options
You can measure true airspeed using a GPS. Hold power and altitude and
turn into the wind. Turn until you have the lowest groundspeed. Now fly
for one minute. Note the groundspeed. Turn 180 degrees and fly for one
minute. Average the two groundspeeds and you will have your TAS within
a knot or so.
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