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The barehanded approach has a live line worker performing the work in direct electric contact with live parts. Before contact, the worker's body is raised to the same electric potential as the live parts, and then held there by electric connection, while maintaining suitable isolation from the surroundings which are at different potentials ...
Such work is often done by helicopter by specially trained powerline workers. [4] Isolated line work is only used for transmission-level voltages and sometimes for the higher distribution voltages. Live wire work is common on low voltage distribution systems within the UK and Australia as all linesmen are trained to work 'live'.
The line length can be adjusted for various conditions such as tree canopy. A critical factor of these systems is a redundant method of connection between the longline and the helicopter that is intended to prevent inadvertent load release while still allowing for intentional release.
The helicopter involved was a U.S. Army Sikorsky UH-60L Black Hawk [13] registered as 00-26860. [4] The helicopter was configured for use as executive transportation for senior U.S. officials and soldiers, and was flying under the callsign PAT25, indicating a "Priority Air Transport" flight. [2] [14] No senior officials were on board the ...
The Bell AH-1Z Viper [3] is a twin-engine attack helicopter, based on the AH-1W SuperCobra, designed and produced by the American aerospace manufacturer Bell Helicopter. It is one of the latest members of the prolific Bell Huey family. It is often called "Zulu Cobra", based on the military phonetic alphabet pronunciation of its variant letter.
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Data from AgustaWestland, Airbus Helicopters, The International Directory of Military Aircraft, 2002/2003 General characteristics Crew: 2 flight crew + loadmaster / sensor operator Capacity: 20 seated troops; or 12 medevac stretchers; or 2 NATO pallets; or 4,200 kg (9,259 lb) external slung load Length: 16.13 m (52 ft 11 in) Empty weight: 6,400 kg (14,110 lb) Max takeoff weight: 10,600 kg ...
Generally, the SPIE rope is lowered into the pickup area from a hovering helicopter. Patrol personnel, each wearing a harness with an attached carabiner, hook up to a D-ring inserted in the SPIE rope. A second safety line is attached to a second D-ring located above the first.