True Airspeed Calculator
This Java applet will let you accurately measure the true airspeed of
your airplane by using
GPS-determined groundspeeds. Fly straight and level for one to two minutes on each of the
cardinal headings North, East, South, and West. Fly headings (not courses) of 0, 90, 180, and 270
and do not change altitude or power setting.
After reestablishing straight and level flight on each heading note the average GPS groundspeed.
Enter those GPS groundspeeds below and click the calculate button.
The program correctly accounts for wind but assumes that the wind speed and direction were constant
during the four legs. The program calculates your aircraft's true airspeed for that altitude
and power setting. Repeat for different altitudes and power settings.
You can use the true airspeed values to calibrate your airspeed indicator using an
E-6B or TAS bezel on the indicator.
Contact me at Paul.Beale@Colorado.edu if you would like a copy of the applet to add to your own page.