![]() Mathematically increase your indicated airspeed (IAS) by 2% per thousand feet of altitude to obtain the true airspeed (TAS).įor example, the indicated airspeed (IAS) of my Comanche at 8,500 ft. (In this case, we assume that the corrected airspeed (CAS) and the IAS are the same.) Read your altitude above Mean Sea Level (MSL) on your altimeter, based on the proper altimeter setting. Read your indicated airspeed (IAS) on your airspeed indicator. If you have a GPS available while flying the pattern, you might want to use our True Airspeed Calculator VIA GPS for the utmost in accuracy. This is an accepted method for taking the estimated air temperature at altitude without actually knowing the outside air temperature ( OAT). To quickly calculate your true airspeed while actually in flight to a very close estimate, execute the following instructions. All cross country aviation calculations are based on flying at the planned true airspeed, generally defines as the speed of the airplane through the relatively undisturbed airmass. ![]() ![]() This calculator is designed to give a corrected value known as TAS, or true airspeed. This calculator requires the use of Javascript enabled and capable browsers. ![]()
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