Range Vs. Payload
THE RANGE OF AN AIRPLANE is affected by its weight, speed, fuel load, engine R.P.M. and other factors. The effect of each item can best be studied by finding just how each affects the miles per lb. of fuel of the airplane. The miles per lb. of fuel, or specific range, is equal to the speed in miles per hour divided by the pounds of fuel used per hour.
By George S. Schairer14 min