PART VI - FLIGHT PLANNING CHARTS
The climb data is shown on the left of each chart at the
beginning of a flight and the optimum range speeds and
the approximate speeds at 93 per cent. at different
altitudes are shown graphically on the right of each chart.
Several scales for "lb. fuel remaining" are given at the
bottom of each chart to take account of the different
weight of fuel in the tanks according to the sp. gr. of
the fuel used.
Use of the charts
(v) To obtain the minimum amount of fuel required to fly
a given distance, select the point farthest to the left of
the chart on the appropriate distance line (by inter-
polation if necessary) and read off the "lb. fuel remain-
ing" on the appropriate line vertically below. From the
figure obtained deduct the fuel required for descent and
landing and subtract the total from the fuel weight at
take-off.
(vi) To obtain the maximum distance it is possible to fly for
a given fuel load, inspect the appropriate chart to find
the height at which the maximum distance for that
amount of fuel is obtainable, then subtract the descent
and landing allowances for that height. The resulting
reading when applied to the "fuel remaining scale" gives
the equivalent distance on the distance/altitude scale.
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