THE various flight procedures for medium and long range operation of transport aircraft are described, and the constant power basis is shown to be advantageous for airscrew‐driving power units when comparisons are required in the design study stage. To avoid the approximation involved in assuming a cruising speed which is a mean of the initial and final speeds and likely to introduce errors when the fuel load is an appreciable percentage of all‐up weight, a method is presented which by means of a chart enables the true Still Air Range to be evaluated.
Stratford, A.H. (1948), "An Analysis of Range for Aircraft Project Design: A Rapid Method for the Estimation of Still Air Range When Operating on Constant Power", Aircraft Engineering and Aerospace Technology, Vol. 20 No. 10, pp. 306-307. https://doi.org/10.1108/eb031680
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