Comparing graphs

moment-weight chart projected on arm-weight chart

arm-weight chart projected on moment-weight chart

Fuel curves

OO-VPE, 1 segment = 20L

Pilot curves

OO-VPE, 1 segment = 20kg

Virtual Arm

OO-VPE, moment around 0.97m

This can be used as a maximum value that can be calculated to replace the graphical method.

New limits are:

Min CG: 0.205 m
Max CG: 0.564 m
Max Weight: 980 kg
Min moment around 0.97 m: -550 m.kg

Example

	Weight (kg)	Arm (m)	Moment (m.kg)
Empty	667.7	0.274	182.7
Front	65.0	0.410	26.7
Rear	5.0	1.190	6.0
Baggage	5.0	1.900	9.5
Zero Fuel	742.7	0.303	224.9
Around 0.97 m	742.7	-0.667	-495.4

Fuel	88.3	1.120	98.9
Full Fuel	831.0	0.389	323.5
Around 0.97 m	831.0	-0.581	-482.8

First we calculate our normal WB
Then we calculate the arm around 0.97: 0.303 - 0.970 = -0.667
Then we calculate the arm around 0.97: 0.390 - 0.970 = -0.580
Resulting in a moment of -496 and -482, which are OK

Another method:
225 - 0.97 * 743 = -496
324 - 0.97 * 831 = -482

Weight and balance around 0.97 m

New limits are:

Min CG: -0.765 m
Max CG: -0.406 m
Max Weight: 980 kg
Min moment: -550 m.kg

	Weight (kg)	Arm (m)	Moment (m.kg)
Empty	667.7	-0.696	-464.7
Front	65.0	-0.560	-36.4
Rear	5.0	0.220	1.1
Baggage	5.0	0.930	4.7
Zero Fuel	742.7	-0.667	-495.3

Fuel	88.3	0.150	13.2
Full Fuel	831.0	-0.580	-482.1