First step is to determine each cabin weighted average H-arm.
(
.
arm ×
2 +
H .
arm ×
2 +
K +
H .
arm 2)(H .
arm ×
4 +
K +
H .
arm ×
4)
H × )
+(
C1C2 C6 W1 W6
H .
armOA =
32
=
16.5 m
1×(16.5 .H25 ) (16.5 .33.1555)
.Index(1kg) == =.0.00666 IU/kg
Cabin OA
C 2500
WEIGHT AND
BALANCE
WEIGHT AND
BALANCE
C. BALANCE CHART DESIGN
2.5. .
Index for cargo loading
WBM 1.60 Cargo chapter gives information on the H-arm of cargo CG position for each cargo
type (container, pallets or bulk).
For each cargo type on each cargo position the .Index is calculated.
. Ex : A330-200 AFT cargo compartment positions
Position 31
Containers : H-armaverage=37.607 m .Index(1kg) =.Index(1kg) =.Index(1kg)
31 31R 31L
1× (37.607 . H ) (37.607 . 33.1555)
C 2500
Pallets 88“ : H-armaverage=37.958 m 1× (37.958 . H ) (37.958 . 33.1555)
.Index(1kg) = 25 = =+0.00192 IU/kg
31P Pallet 88"
C 2500
C. BALANCE CHART DESIGN
Pallets 96“ : H-armaverage=38.095 m 1× (38.095 . H25 ) (38.095 . 33.1555)
.Index(1kg) == =+0.00198 IU / kg
31P Pallet 96"
C 2500
Note : Each item H-arm represents the load CG position, it is usually located at the ULD barycentre for non bulk cargo and at the cargo position surface barycentre for bulk cargo.
These .Index values per kg are presented in the AHM560, nevertheless on the manual balance chart it is not possible to take into account the .Index of each individual cargo position and each individual cargo type.
First step is to determine each cargo hold weighted average H-arm. Containers : Max weight = 2x1587 kg = 3174 kg Pallets 88“ : Max weight = 4626 kg Pallets 96“ : Max weight = 5103 kg
(H + H + H )× 3174 +(H + H )× 4626 +(H + H )× 5103
31 32 33 31P 88" 32P 88" 31P 96" 32P 96"
H =
Cargo3
3 × 3174 + 2 × 4626 + 2 × 5103
= 39.225 m
1× (39.225 . H25 ) (39.225 . 33.1555)
.Index(1kg) == =+0.00243 IU / kg
Cargo3
C 2500
WEIGHT AND
BALANCE
WEIGHT AND
BALANCE
C. BALANCE CHART DESIGN
2.6. .
Index for fuel loading
Weight & Balance Manual section 1.20 (—Fuel“) provides with information on the aircraft fuel tanks, the H-arm of the fuel in each individual fuel tank for each fuel quantity and describes the automatic refueling sequence. From this data it is possible to determine for each total fuel quantity, on the first hand the fuel quantity that will be in each tank after the refueling sequence is completed and on the second hand the corresponding total fuel CG position. Last, for each total fuel quantity the .Index is calculated.
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