Quantcast Figure 4-7 MCF Less Than EFR

 

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CHAPTER FOUR
T-6A NAVIGATION
MCFpt = EFRpt - (EFRiaf - 280
or , for Point A in Figure 4-7:
MCFpt = 801 (325 - 280)
MCFpt = 756
Assuming an IAF EFR of 325 pounds, what are the remaining MCFs for Figure 4-5? The
answers are shown in Figure 4-7.
Since wind affects EFR and MCF data, compute all enroute/high altitude portions of the flight
(which affect EFR data) using best available wind data. For this reason, write EFR and MCF
data on the chart in pencil, and compute them just prior to mission briefing.
What if your computed MCF is less than your EFR? In this situation, you may still attempt to fly
the sortie, but only with a plan to shorten the mission (such as the fuel limiter routing, VNAV 4)
either in low-level or by only planning one approach.
A to B:
B to C:
C to D:
MC
002
MC
087
MC
108
DIST
25
DIST
34.5
DIST
21.5
ETE
8+20
ETE
11+30
ETE
7+10
ALT
1500
ALT
1500
ALT
1500
EFR
801
EFR
706
EFR
540
AFR
AFR
AFR
MCF
756
MCF
661
MCF
510
BINGO:
BINGO:
BINGO:
Figure 4-7 MCF Less Than EFR
408.  DETERMINE BINGO DISTANCE, FUEL, MAGNETIC COURSE, AND
ALTITUDE (BINGO)
The last portion of the information box is Bingo data. This entry states the minimum fuel,
heading, and altitude required to safely execute mission abort at a point on the low-level route
and arrive over the destination with IFR fuel minimums.
To compute the information, first determine magnetic course and straight line distance between
each turnpoint and NPA. (Do not actually draw this line on your chart.) Note in Figure 4-8 the
distance is measured from the point directly to the field, not the IAF. Use this distance and
interpolate the BINGO information for the given point.
4-8
FUEL PLANNING, JET LOGS, DD 175


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