31-05. DETERMINATION OF CG POSITION
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1. Given:
CG limits from datum: 82,0 – 94,6 inches
Arm from datum to baggage zone 1: 22,5 inches
Arm frdm datum to baggage zone 4: 178,7 inches
Loaded CG: 96,6 inches
Total weight of loaded aircraft: 3.400 lbs
Freight equally distributed between baggage zones 1 and 4
The weight of freight to be moved between baggage zones to bring the aircraft into balance is:
2. A turbojet aeroplane has a planned Takeoff Mass of 190.000 kg. Following cargo loading, the crew is informed that the centre of gravity at takeoff is located at 38% MAC (Mean Aerodynamic Cord). The captain then decides then to redistribute part of the cargo load between cargo 1 and cargo 4 in order to obtain a new centre of gravity location at 31% MAC. He asks for a transfer of:
3. The planned Takeoff Mass of an aeroplane is 180.000 kg, with its centre of gravity located at 31% MAC (Mean Aerodynamic Cord). Distance from reference point to leading edge = 14 m. Length of MAC = 4,6 m. Shortly prior to engine start, the local staff informs the crew that an additional load of 4.000 kg must be loaded in cargo 1 (located at 2,73 m aft of the reference point). After loading this cargo, the new centre of gravity location will be:
4. A turbojet aeroplane has a planned Takeoff Mass of 190.000 kg. The cargo load is distributed as follows:
Cargo 1: 3.000 kg (3,50 m from reference point)
Cargo 4: 7.000 kg (20,39 m from reference point)
Distance from reference point to leading edge: 14 m
Length of MAC: 4,6 m
Once the cargo loading is completed, the crew is informed that the centre of gravity at takeoff is located at 38% MAC (Mean Aerodynamic Cord) which is beyond the limits. The captain decides then to redistribute part of the cargo load between cargo 1 and cargo 4 in order to obtain a new centre of gravity location at 31% MAC. Following the transfer operation, the new load distribution is:
5. A turbojet aeroplane is parked with the following data:
Corrected Dry Operating Mass: 110.100 kg
Basic corrected index: 118,6
Takeoff Mass: 200.000 kg
Centre of gravity location: 32% MAC
Distance from reference point to leading edge: 4 m
Length of MAC: 4,6 m
Initial cargo distribution:
Cargo 1: 4.000 kg (2,73 m from reference point)
Cargo 2: 2.000 kg (8,55 m from reference point)
Cargo 3: 2.000 kg (16,49 m from reference point)
Cargo 4: empty (21,13 m from reference point)
To maximize performance, the captain decides to redistribute part of the cargo load between cargo 1 and cargo 4, in order to takeoff with a new centre of gravity location at 35% MAC. After loading, the new load distribution between cargo 1 and cargo 4 is:
