Comparison of a New Method for Measuring Aircraft Power and Drag in Flight with a Standard Technique

Drag and power information extracted by a new method from accelerated flight test data on an advanced technology light twin airplane are compared with drag results taken by the usual speed-power method. Agreement is fair at low angles of attack and poor at high angles of attack. The new method requires accurate input data for good results and some inconsistencies still remain in these data. As a consequence, the results obtained by the new method must be regarded as tentative at this time.