Aeronautics and astronautics – Aircraft structure – Load accommodation
Patent
1990-03-20
1991-12-03
Barefoot, Galen
Aeronautics and astronautics
Aircraft structure
Load accommodation
244136, 244 1711, B64D 700
Patent
active
050694006
ABSTRACT:
For controllably suspending a load from a helicopter such that the load can be quickly jettisoned in an emergency, a rigid stabilizer bar is suspended from a quick-release cargo hook attachment point of the helicopter, and a yoke structure is releasably carried by the hook in fixed relation to the bar, opposite ends of the yoke having flexible lines connected to spaced apart locations on the load. Opposite ends of the stabilizer bar are connected by bungee cords to landing skid anchors for stabilizing the yoke. The attitude of the load is controlled by yawing and rolling maneuvers of the helicopter. If necessary, the yoke, together with the lines and the load, can be jettisoned from the vehicle by releasing the hook. The load can be configured as a cleaning module for directing a cleaning medium onto an elevated workpiece such as an insulator of a transmission line tower. The cleaning module produces a stream of particulate such as crushed walnut shells in a high-pressure air blast from a nozzle that is located on a boom projecting from the module, the nozzle being aligned in a predetermined direction relative to the yoke. The helicopter can fly with the cleaning module suspended beside the insulator, the nozzle being aimed relative to the workpiece horizontally by yawing the helicopter and vertically by rolling the helicopter, the module having a first position proximate the helicopter, and a second lower position for use with single circuit towers having three horizontally displaced insulators.
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