TM 1-1520-240-10
6-6-25
6-6-62. Load Dumping From Ramp.
CAUTION
Damage to the helicopter or load could
occur when load dumping from the ramp.
Make sure taxi surface is level and free of
obstacles.
Dumping from the ramp is not a routine operation, but
under urgent conditions can be accomplished as follows:
a.
Helicopter at full stop.
b.
Remove ramp extensions and rollers if installed.
c.
Load released, but under control and moved to
aft cabin ramp with ramp slightly in up position.
WARNING
Crew members must remain clear of load.
d.
Helicopter taxis forward at approximately 5 knots
ground speed. When 5 knots is reached, the ramp should
be lowered and load pushed out the ramp of the helicop-
ter.
e.
Repeat as required.
6-6-63. Extended Range Fuel System (ERFS), ERFS
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 com-
binations 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 configura-
tion 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 con-
trol panel, restraint system, FARE kit, and unusable fuel,
with Tank 1 C.G. at 250 inches, Tank 2 C.G. at 330 inch-
es, 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
