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Figure  6-6-11.  Cargo Door Cranking
Figure  6-6-12.  Compartment Loading

TM-1-1520-240-10 Army CH-47D Heilcopter (EIC:RCD) Manual
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TM 1-1520-240-10            6-6-21 6-6-47.  Securing Cargo. The helicopter is subjected to forces which result from air turbulence, acceleration, rough or crash landings, and aerial maneuvers. These same forces act upon the cargo in the helicopter and tend to shift the cargo unless it is firmly  secure.  Forward  motion  of  the  helicopter  is  the most rapid movement that will be encountered and is the strongest force that is likely to act on the cargo if the helicopter is suddenly slowed or stopped in a crash lan- ding. Other forces tending to shift the cargo aft, laterally, or vertically will be less severe. The amount of restraint required to keep the cargo from moving in any direction is called the restraint criterion and is expressed in units of the force of gravity, or g’s. In each case, the maximum force exerted by the item of cargo to be restrained would be its normal weight times the number of g’s of the re- straint criteria. In order to safely carry cargo, the amount of restraint applied should equal or exceed the maximum amount of restraint required. Restraint is referred to by the direction in which it keeps the cargo from moving. Forward restraint keeps the cargo from moving forward, aft restraint keeps the cargo from moving aft, and so on.







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