FM 55-450-2 PDF

Army Helicopter Internal Load Operations (FM ) [Department of the Army ] on *FREE* shipping on qualifying offers. Field Manual provide extensive information about FM ( ). FM PREFACE. This manual will assist personnel who perform helicopter internal load missions. It will familiarize them with.

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The gross weight of a loaded pallet will not exceed 2, pounds. It consists of an adjustable nook, tension collar, chain lock, a quick-release lever, and a 9- foot steel cha in with an L-shaped hook on one end Figure In fn, the L-shaped hook end of the chain is passed over the load, and the hook is then engaged with a link of chain.

Each of the four wheels has an independent retraction and extension system manually operated by the mechanical jacks or alternate hydraulic pumps attached to each wheel gear. Four fit- 80 inches from station to station This section uses two identical ramp extension roller assemblies and separate ramp extension support assemblies.

A 3,pound capacity winch is mounted on the floor in the right-hand forward bulkhead. This tie-down device has a rated strength of 10, pounds.

In addition, axle weights must be marked above each axle. Because of its shape, size, and the tie-down locations, the tie-down devices fn be applied at an angle of 30 degrees to the cargo floor. If a tie-down is stressed mf its breaking point, the fitting is stressed an equal amount up to the full rated strength of the tie-down. The pressures here are concentrated along a thin ribbon of contact at each wheel. Weight of load x restraint criterion Rated strength of tie-down device x 0.

Army Helicopter Internal Load Operations (FM 55-450-2)

The selection of a usable PZ or LZ is extremely important. Two models of the CH are used by the military A and B. Figure shows the locations of the cargo restraint rings in the CH pod. It describes how to determine tie- down requirements and shoring needs. Sign In Sign Out.


If the shoring is 3 inches thick, the load-bearing border added is 3 inches wide, and so forth. These include explosives, flammable liquids and solids, oxidizers, corrosive materials, compressed gases, poisons, irritating materials, etiologic agents, and radioactive materials.

Check the particular require- ments of the aircraft for which the load is prepared. This action aids unloading the pod by allowing the use of a forklift and other cargo-moving equipment. While causing a loss of restraint in one direction, imposing these angles on the tie-down device fur- nishes restraint in two other directions, so that one tie-down device provides restraint in three directions simultaneously.

Use the following rules when applying tie-down devices to cargo without tie-down provisions: Determine how many pallets or cargo nets you will need. The supported unit — 1 Selects and controls the pickup zone PZ. In arranging composite loads, cargo should not be stacked so that it is top heavy.

In the movement of cargo, you often encounter odd shapes and sizes of cargo that require movement by air. Some key points to remember are — a. Lay out the helicopter winch cable and attach the hook to the item of the towing bridle.

It has a 2,pound lift capacity. Since all aircraft have relatively fragile flooring, place particular emphasis on proper distribution of cargo weight. Using forklifts with shorter tines, picking up the pallet suspended from the corners with a crane, or other similar methods are not authorized for routine pallet movement. Never pile wet nets together for storage.

Whenever winching a L pallet, always use two attaching points. With appropriate materials, mark the CB and gross weight of the vehicle. Place two boards of equal length with 55450-2 forward ends on the helicopter and the rear ends on the ground. Construct a table similar to the one shown and estimate the tie-down angle for each tie-down device. Determine the amount of tie-down devices required to properly secure a composite load of 1, pounds.

All pallets will be compatible with Army materials- handling equipment MHE. Do not plan an internal cargo mission without direct coordination with the supporting aviation unit. They 5-5450-2 be positioned to accommodate various vehicle tread widths or butted together for easier loading of bulk cargo.

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There are also symmetrically opposite left-hand assemblies. Each 5,pound capacity fitting seivels freely and can resist a single maximum load of 5, pounds exerted along any radius of a hemisphere, the flat side of 55-4500-2 is the surface of the floor.

Army Helicopter Internal Load Operations (FM ) : Department of the Army :

Apply tie-down devices to the 555-450-2. Up to three pallets can be winched or manually loaded on the system maxi- mum 7, pounds each. A 3,pound capacity winch is mounted on the floor in the right-hand forward bulkhead. When possible, transport the boards and blocking material with the cargo, since the ramp- toe extension will also be needed during the unload- ing of the helicopter. Hook one of the end links of the chain in the grabhook to form a second circle.

Usually, load binders are used to draw up tautly a tie-down strap that is passed through, around, or over cargo items and fitted with a quick-fit strap fastener except when the quick-fit strap is used as a binder by itself.

FM Army Helicopter Internal Load Operations – Table of Contents

With reasonable care and protection, they should last almost indefinitely. The aviation unit — 1 Coordinates with the supported and receiving units and appoints a liaison officer who is thoroughly familiar with the capabilities and limitations of his unit’s assigned aircraft.

The presence of bends, 55-450-22, or distortion will oe cause for replacement. Restrain the loads according to the procedures and guidelines in TMs and The device applied across the front of the cargo will only provide restraint in the forward direction since it is trie only directio n in which it 55-405-2 preve nts the cargo from moving Figure Detail B.