(3) Select a figure in the fuel column equal to, or the next entry less than, the available amount
of fuel in the airplane as determined in paragraph 2,a, (2) above. Move horizontally to the right
or left and select a figure equal to, or the next entry greater than the air miles (with no wind) to
be flown. Operating values contained in the column number in which this figure appears,
represents the highest cruising speed possible at the range desired; however, the airplane may
be operated in accordance with values contained under OPERATING DATA in any column of
a higher number with the flight plan being completed at a sacrifice of speed but at an increase
in fuel economy.
P-38 PILOT OPERATING INSTRUCTIONS- Page 14 -
(4) Using the same column number selected by application of instruction contained in the
preceding paragraphs, read the gallons per hour given at the altitude to be flown and divide this
figure into the number of gallons available for cruising as determined in paragraph (2) above.
This will give the calculated flight duration in hours, which can then be converted into hours
and minutes and deducted from the desired arrival time at destination in order to obtain the take-
off time (without consideration for wind). To allow for wind, determine the calculated ground
speed by dividing the flight duration iii hours into the range selected in paragraph (3) and
calculate a new corrected ground speed with the aid of a navigator's triangle of velocities.
http://ftd38.tripod.com/p38op14.html (2 of 2) [02/11/2002 9:40:13 PM]
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