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of cargo. Some of these features are parts of systems
and are permanently installed; others are equipment
which is stowed in the helicopter. The following paragraphs
contain descriptions of items classed as loading
aids. Specific instructions for some of these items may be
found in other parts of this manual and are referenced.
TM 1-1520-240-10
6-6-7
Figure 6-6-2. Maximum Package Size (Sheet 3 of 3)
6-6-19. Cargo Loading Ramp.
The ramp provides a means of quickly loading and unloading
troops and cargo. It can also be used to support
portions of a cargo load which exceeds the longitudinal
dimensions of the cargo floor. When used for additional
cargo space, the ramp must be positioned so that the
ramp floor is level with the cargo floor. In this situation, the
weight of the cargo item resting on the ramp must not
exceed 3,000 pounds or 300 psf.
6-6-20. Auxiliary Loading Ramps.
Three auxiliary loading ramps are hinged to the aft end
of the ramp (fig. 6-6-7). When the ramp is lowered, these
auxiliary ramps are unfolded to provide flush contact between
the ramp and the ground. The auxiliary loading
ramps can be positioned to accommodate various vehicle
tread widths or butted together to facilitate winching
of bulk cargo. When not in use, the auxiliary ramps are
stowed in an inverted position on the floor of the ramp or
removed. One of the auxiliary loading ramps when attached
to the ramp can also be used as a work platform.
A collapsible support attached to the ramp bottom allows
the ramp to be positioned at any convenient height when
used as a work platform.
TM 1-1520-240-10
6-6-8
Figure 6-6-3. Tiedown Fittings
TM 1-1520-240-10
6-6-9
Figure 6-6-4. Compartment Data
TM 1-1520-240-10
6-6-10
Figure 6-6-5. Internal Cargo Moments Chart (Sheet 1 of 2)
TM 1-1520-240-10
6-6-11
Figure 6-6-5. Internal Cargo Moments Chart (Sheet 2 of 2)
TM 1-1520-240-10
6-6-12
Figure 6-6-6. External Cargo Moments Chart (Sheet 1 of 2)
TM 1-1520-240-10
6-6-13
Figure 6-6-6. External Cargo Moments Chart (Sheet 2 of 2)
TM 1-1520-240-10
6-6-14
6-6-21. Winch.
Refer to Chapter 4, Section III.
6-6-22. Cargo Door and Ramp.
The cargo door and ramp has an upper section, or cargo
door, and lower section, or ramp. The door retracts into
the ramp when the ramp is being lowered and extends
when the ramp is being raised. Retraction or extension
of the door can be isolated through the ramp sequence
valve so the ramp can be raised or lowered with the door
retracted into the ramp or extended. The door is an integral
part of the ramp and only provides closure; therefore,
references made to the ramp will be understood to include
the door and its related movements. The cargo
door is jettisonable to provide an emergency exit. The
cargo door and ramp is located at the aft end of the cargo
compartment and is used for troop and cargo loading and
unloading. In closed position, it conforms to the side contours
of the fuselage (fig. 6-6-7). Internal locks in the
ramp actuating cylinders prevent accidental opening and
constitute the only locking mechanism for keeping the
ramp closed. The ramp is hinged to the fuselage and
opens rearward and downward to rest on the ground.
When lowered to ground rest, the ramp inclines downward
approximately 6.75 and maintains a uniform
78-inch overhead clearance, (if HICHS is not installed),
of the cargo compartment. A continuous hinge runs the
entire width of the aft upper edge of the ramp and holds
the three auxiliary loading ramps. The auxiliary ramps
unfold to bridge the gap between the ramp and the
ground for vehicle loading and unloading. they can be
adjusted laterally to accommodate various vehicle
thread widths. Hydraulic power to operate the ramp is
supplied through the utility hydraulic system.
6-6-23. RAMP CONTROL Valve.
Lowering and raising the ramp is controlled by a RAMP
CONTROL valve on the right side of the aft cargo
compartment between the floor and the overhead at sta
490 (fig. 6-6-8). The RAMP CONTROL valve is operated
either electrically or manually. Electrical operation is performed
by setting the RAMP PWR switch to EMERG, and
using the RAMP EMER control switch on the cockpit
overhead HYD control panel (Chapter 2, Section VI).
Manual operation is accomplished by setting the RAMP
PWR switch to ON, and using a three-position lever
mounted on the RAMP CONTROL valve. the lever positions
are labeled UP, STOP, and DN (down). The control
lever can be reached from the outside through a hinged
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