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SECTION  III.  FLIGHT CHARACTERISTICS
SECTION  IV.  ADVERSE ENVIRONMENTAL CONDITIONS

TM-1-1520-240-10 Army CH-47D Heilcopter (EIC:RCD) Manual
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TM  1-1520-240-10 8-3-2            8-3-6.  Aerodynamic Loads. Aerodynamic loads, such as tow targets, drones, light aircraft, aircraft parts, wings and tail sections have cer- tain inherent dangers because of their aerodynamic lift capabilities. Therefore , the lift capabilities of external loads must be eliminated before they are lifted. Airspeed and bank angles will be governed by the reaction of the load to the airspeed. Drogue chutes shall also be used to streamline the load. However, the chute must be at- tached to the load with a swivel fitting. 8-3-7.  Multi-Hook Loads. Handling characteristics are improved when loads are slung using two-point (forward and aft hook) sling sus- pension. Load motion is substantially reduced. Potential- ly unstable loads are directionally restrained by two-point suspension; airspeed capability is increased above the airspeed for single-point suspension. When low density high-drag cargo is carried, the risk of single hook failure in two-point suspension is reduced by the addition of a safety  sling  from  the  center  hook  to  the  forward  load attachment point. The multi-hook configuration also en- ables the carrying of three independent loads within the CG limit.







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