Range Performance in Cruising Flight

The classical theory of range performance is reviewed, and some further relationships derived. The first part of the paper deals with specific range, which is the instantaneous range performance of an aircraft at a point on a cruise trajectory, in terms of distance covered per unit quantity of fuel consumed. The second part of the paper is concerned with the integration of specific range over a given flight trajectory, to give the integral range on a given quantity of fuel comparisons are made between the ranges obtained using various cruising techniques, and some numerical examples are included.