Selkirk College IATPL Program Manual
Beech 95 POH Effective September 1, 2005 Appendix 14 - 54
An allowance must then be made for taxi fuel and fuel used during the flight. 15 pounds
of fuel is typical for taxi allowance but more should be allowed if delays in departure are
expected. An average arm of 84 is used for taxi fuel allowance based on the pilot using
all four tanks for approximately equal time during startup and taxi. The moment for the
taxi fuel is calculated by multiplying -15 x 84 = -1260. This moment is then subtracted
from the ramp moment to give the value 323750. The takeoff cg position is then
determined by dividing the moment by the takeoff weight, in the example this is 323750
divided by 4064 = 79.7.
To allow for fuel used during the flight the weight of fuel used is subtracted and the
moment for the fuel is calculated and subtracted also. In the example 100 pounds of fuel
is used from the main tanks with a moment of –7500. The moment of 75 pounds of fuel
used from the aux tanks is –6975. The landing moment is therefore 309275. This moment
is then divided by the landing weight to get the landing cg position (309275 divided by
3889 = 79.5.)
Once the takeoff and landing weight and cg have been determined plot these values on
the chart of Figure 1 to ensure they are within limits.
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