aircraft CG movement
32 232 Eaircraft CG movement = 3289.53 . 10600.1 = -7310.57 kg.m
WEIGHT AND
BALANCE
WEIGHT AND
BALANCE
C. BALANCE CHART DESIGN
3.6.3. In flight passenger and crew movements
On the balance chart all the aircraft CG values are based on the passenger and crew position at
takeoff.
We consider that at landing the configuration is identical to the takeoff one.
During the flight passengers and crew are moving throughout the cabin.
Eaircraft CG movement item = Moment due to item movement
Eaircraft CG movement item = Witem x (H-armItem final position . H-armItem initial location)
The estimation of the possible inflight movements depends on the airline operations, on the
cabin layout, on the flight type…
The objective is to determine realistic impact on the aircraft CG during the flight by considering
the different periods of the flight when there are movements in the cabin :
. Meal servicing,
. Passengers moving to the lavatories
. Crew moving to the crew rest areas
. Duty free sells
. …
Some of these movements may happen simultaneously, some will move the aircraft CG forward, some will move it aft.
A standard movement scenario is used in Airbus standard method : . All movements are defined based on initial position of the item or person at takeoff. . Galleys, lavatories and crew are assigned per passenger class, and movements
are performed within each class section. . All movement in one direction (forward/aft) happen simultaneously. . There is one passenger per lavatory, when 2 lavatories are available for the same
passenger section then 2 passengers from the middle of the section move toward
them at the same time. . There is one cabin crew and one trolley per aisle for meal servicing. . When underfloor crew rest or crew rest area is defined in the cabin, then
additional movements towards the rest area are taken into account. Crew members form the whole cabin are moving. . Additional movement may be added : cabin crew to the cockpit, cockpit crew to
cabin area. This scenario enables to establish for each item or person moving Eaircraft CG movement item = Witem x (H-armItem final position . H-armItem initial location), then as all movement in one direction (forward/aft) happen simultaneously, the total Eaircraft CG movement is the sum of each individual Eaircraft CG movement
item.
WEIGHT AND
BALANCE
C. BALANCE CHART DESIGN
2 economy class passengers to economy class lavatories
Eaircraft CG movement 2 pax from row 21 to Lc/Ld = W2 pax x (H-armLc/Ld . H-armRow21)
Eaircraft CG movement 2 pax from row 21 to Lc/Ld = 2x 75 x (19.627 . 33.360) = - 2059.95 kg.m 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：Getting to Grips with Aircraft Weight and Balance(80)
