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II and FARE Kit Weight and Balance Data.
Refer to figure 6-1-1, table 6-6-3 and 6-6-2.
The operator, upon configuration of ERFS II and FARE
kit, must compute various fuel amounts to calculate combinations
of weight and balance matching the mission
requirements. Table 6-6-1 lists the weights, ARM and
moments of ERFS II and FARE kit installations.
WARNING
Some combinations of ERFS II configuration
and auxiliary fuel load will cause the
helicopter to exceed weight and balance
limits. It is the responsibility of the flight
crew to ensure the helicopter center of
gravity remains within operating limits at
take-off and landing.
Standard configuration for the ERFS II consists of three
tank assemblies, fuel transfer hose assembly, fuel control
panel, restraint system, FARE kit, and unusable fuel,
with Tank 1 C.G. at 250 inches, Tank 2 C.G. at 330 inches,
Tank 3 C.G. at 410 inches, and FARE kit C.G. at 464
inches.
6-6-64. Restraint System Limits.
The limitations of the restraint system are 8 G’s forward.
3 G’s aft, 8 G’s vertical, and 8 G’s lateral, measured with
each tank one half full of fuel.
6-6-65. Breaking Loads of Self Sealing Breakaway
Valves.
The breaking loads of the self sealing breakaway valves
utilized in the ERFS II fuel and vent assemblies are:
moment bending 750 lbs (150 lbs) at 7 inches, and
tension 4,300 lbs.
Table 6-6-1. Extended Range Fuel System (ERFS) Weight and Balance Data
Configuration Weights/Balance Station Moments/1000
Fuel Tank 1 511.3 230.0 117.6
Fuel Tank 2 511.3 290.0 148.3
Fuel Tank 3 511.3 350.0 178.9
Fuel Tank 4 511.3 410.0 209.6
FMCP 48 190 9.1
Vent Lines 15 320 4.8
Pump Discharge Lines 20 290 5.8
Feed Lines/Manifold 70 290 20.3
Forward Area Refueling 800 502 401.6
Equipment (FARE)
(2 Pumps, 2 Filters, and 2 Fuel Cans)
HICKS 878 379.9 333.5
3/463L Pallets (290 lbs ea.) 870 323 281.0
TM 1-1520-240-10
6-6-26
Table 6-6-2. Extended Range Fuel System II (ERFS II) Weight and Balance Data
Item Weight (LBS) Station (ARM) Moment/1000
Single-point Refuel Hose 23.0 240. 5.5
Total Weight and Moment 23.0 5.5
ERFS II Tank 1 (Empty) 607.0 250.0 151.8
Unusable Fuel (5.5 gal JP-8) 36.0 250.0 9.0
Fuel Control Panel (FCP) 20.0 217.0 4.3
Vent Hose 10.0 235.0 2.4
Elect Harness, Hel to FCP 7.0 235.0 1.6
Elect Harness, FCP to Tank 8.0 238.0 1.9
Wiring Harness, Fuel Qty 8.0 240.0 1.9
Restraint Assembly 81.0 250.0 20.3
Total Weight and Moment 777.0 193.2
ERFS II Tank 2 (Empty) 607.0 330.0 200.3
Unusable Fuel (5.5 gal JP-8) 36.0 330.0 11.9
Elect Harness, FCP to Tank 8.0 278.0 2.2
Fuel Hose 15.0 285.0 4.3
Vent Hose 10.0 305.0 3.1
Restraint Assembly 81.0 330.0 26.7
Total Weight and Moment 757.0 248.5
ERFS II Tank 3 (Empty) 607.0 410.0 248.9
Unusable Fuel (5.5 gal JP-8) 36.0 410.0 14.8
Elect Harness, FCP to Tank 8.0 319.0 2.6
Fuel Hose 15.0 375.0 5.6
Vent Hose 10.0 385.0 3.9
Restraint Assembly 81.0 410.0 33.2
Total Weight and Moment 757.0 309.0
Fuel Hose, Main to ERFS II 29.0 363.0 10.5
Fuel Hose, Fuel Transfer 13.0 400.0 5.2
Total Weight and Moment 42.0 15.7
FARE Kit (Pump Module, hose, couplings, filters,
meters, and nozzles)
563.0 464.0 261.2
Total Weight and Moment 563.0 261.2
TOTAL ERFS II (including FARE) Weight and
Moment
2,919.0 1033.1
TM 1-1520-240-10
6-6-27
Table 6-6-3. Loading Sequence Configuration
463L Pallet Configurations
Configuration Component Comment
Load Outboard Rollers Down
Warehouse Guides Down
Ramp Extension/Ramp Jacks In Place as Required
Ramp Extension/Ramp Extension In Place as Required
Rollers
Locks Up (Unlock)
Retractable Flange Rotate Outboard (Unlock)
5k/10k Rings Down (Stowed Position)
Restraint Outboard Rollers –
Warehouse Guides –
Ramp Extension/Ramp Jacks –
Ramp Extension/Ramp Extension –
Rollers
Locks Down (Locked)
Retractable Flange Rotate Inboard (Locked)
5k/10k Rings –
Flight Outboard Rollers –
Warehouse Guides –
Ramp Extension/Ramp Jacks Stow in Helicopter
Ramp Extension/Ramp Extension Rotate Ramp Extension on Ramp,
Rollers Rollers on Underside (Stowed Position)
Locks –
Retractable Flange –
5k/10k Rings –
Unload Outboard Rollers –
Warehouse Guides –
Ramp Extension/Ramp Jacks In Place as Required
Ramp Extension/Ramp Extension In Place as Required
Rollers
Locks Up (Unlock)
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