We all want to know how accurate our airspeed indications are, don't we? Well for a long time Kevin Horton had a link to a website (REA Computing) that had one which, if I remember correctly, he said worked pretty well. You fly 3 legs, with headings 90 degrees apart, at the same IAS, and record your TAS and the 3 GPS groundspeeds. Plug the groundspeeds into the applet. The result should be your "true" TAS.
That website quit working for me but here is another:
http://www.csgnetwork.com/tasgpscalc.html
The complete instructions are on the webpage. I am sure the spreadsheet type TAS calculators are more accurate but this is a lot simpler. I welcome any comments as to the accuracy of these applets from any of you "aeros" out there.
GPS derived TAS Calculator
Linear Mode
