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of the physical motion of the point to which it
is attached.
Reflective and tip target sets. These sets
reflect Strobex flash pulses back to the
Strobex operator.
•
4-9
FM 1-514
• Balancer and tracking charts. These charts
are used to calculate weight, sweep, pitch link,
tab, and so forth to correct rotor problems.
NOTE: For further information on how to use
the Vibrex, refer to TM 55-4920-402-13&P.
PRESERVATION
Preservation is the term used for protection of equipment
against deterioration due to exposure to atmospheric
conditions during storage and shipment. The
following items are needed for preservation:
•
•
•
••
Mild soap and water.
Solvent – PD-680.
Moisture-absorbent cloth or filtered compressed
air.
Corrosion-preventive compound (CPC).
Greaseproof paper.
Desiccant bags.
Padded contours (jute felt).
Historical records.
Parking and stenciling materials.
•
•
•
•
Temporary Preservation and Storage
When rotor blades are removed from an aircraft and
stored for any length of time, they must be properly
preserved to remain in serviceable condition.
Preservation procedures are the same for all rotor
blades in the Army inventory. After the blades
have been removed from the aircraft, clean
painted surfaces with mild soap and water and
unpainted surfaces with solvent, PD-680. Never use
solvent on painted blade surfaces because it can
4-10
FM 1-514
loosen the bonding. After cleaning dry rotor
blades with a moisture-absorbent cloth or filtered
compressed air, make sure all surfaces and contours
are completely dry. Then apply a corrosionpreventive
compound to the blades. CPC is a liquid;
it should be spread only on the machined
surfaces and only with a brush. Be careful to include
the inside of all retention bolt holes. The painted
surfaces should not be coated. If the blades are to be
stored for no longer than 3 months, they may be
placed in a slotted rack. Periodic inspection of
stored blades is essential to prevent corrosion of
machined surfaces and to keep painted surfaces
clean. Blades are stored in slots with the leading edge
down and the trailing edge up.
Shipment and Long-Term Storage
When preparing a rotor blade for immediate shipment
or long-term storage, use the procedures explained
above to first clean, dry, and process it. Then
prepare the blade for shipment in a container. Metal
containers are used Armywide for shipment and
storage of rotor blades.
After preserving the blade with a CPC, wrap the
blade, sockets, cuffs, retention plates, and machined
surfaces with greaseproof paper and tape them. This
further protects the blade at these areas from moisture,
condensation, and wear during shipment.
Place a bag of desiccant inside the container to aid in
dehumidifying the interior. The desiccant (silica
gel) absorbs moisture. Jute felt padding comes with
blade containers from the manufacturer. The padding
is a plant fiber made to the shape of the blade
and used to support the blade at different points
along its span. Place the blade in the container with
the jute felt padding supporting it.
Main rotor blades are secured inside containers at
the root ends by either of two methods: by bolting a
cuff fixture to the blade and its container wall, or by
welding along bolt at one end of the container, which
protrudes through the retention bolt holes and is
secured with a nut.
Place the lid on the container and secure it. Make
sure that the outside of the container is stenciled with
the sender, receiver, and serial number of item being
shipped. Remove the container’s old serial number.
A new center-of-balance line should also be stenciled
on at this time.
Use DA Form 2402 (Exchange Tag) and DA Form
2410 (Component Removal and Repair/Overhaul
Record) to ship rotor blades. Prepare two copies
of DA Form 2402. Tie one to the item being
shipped. Tape one on the outside of the shipping
container or place it in the cylinder, which is used
for historical records. Complete one copy of DA
Form 2410 and place it in the cylinder. If blades
are to be stored, the containers can be stacked on
top of each other in a warehouse. Check stored
blades periodically for corrosion and for forms
required by TM 55-1500-344-23.
4-11
FM 1-514
CHAPTER 5
SINGLE-ROTOR POWER TRAIN SYSTEM
A typical single-rotor power tram system (Figure 5-1)
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