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T-6A NAVIGATION
CHAPTER FOUR
Descent Information:
1.  Descent distance is determined using the normal descent chart. For mission planning
purposes, make the following assumptions:
a.
Compute descent to low level from flight planned altitude to surface, disregarding the
actual planned level-off altitude.
b.
Assume level off will occur at entry point.
2.  In actuality, expect to descend earlier than planned for mission pacing and entry point
identification.
Low-Level Training Route Computations:
Because the low-levels are planned "no wind," the times and fuels will not change due to forecast
weather. Plan for a 485 pounds per hour (PPH) fuel flow (8 Pounds Per Minutes (PPM)) on all
navigation flights except N5101/5102 (540 PPH / 9 PPM). Round each leg fuel up to the next
five pounds (e.g,, 51 pounds = 55 pounds), and total the leg fuels to determine total fuel for the
low-level portion.
Climb out, Enroute, and Approach:
Beginning at the low-level exit point, follow the stereo routing back to NPA. For the climb
computations, assume climb begins at surface and goes to flight planned altitude. From level off,
follow general instrument flight planning procedures to your destination. Remember to use best-
known winds for all IFR/enroute portions.
406.
COMPUTING ESTIMATED FUEL REMAINING
Estimated fuel remaining (EFR) is the amount of fuel expected at each point, if the mission is
flown exactly as planned. From this value, compute the mission completion fuel, which is
nothing more than the fuel required to complete the mission exactly as planned.
To compute EFR for the doghouses, first determine the fuel required to arrive at point "A" of the
first low-level route. Subtract this from the initial fuel (1050 pounds) to get the EFR for the entry
point. Then, subtract the fuel consumed on each individual leg to compute the estimated fuel
remaining at each individual low-level point.
FUEL PLANNING, JET LOGS, DD 175
4-3


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