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DESCRIPTION: The Mechanical Dereefing Device allows for the dereefing of cargo parachute canopies and replaces the 1377-M500 (M-21), and MLU-58/B Pyrotechnic Reefing Line Cutter. This device uses a fabricated, re-usable segmented reefing line. Also used with special applications on other selected airdrop systems. Major components: main body, arming pin, time setting arm, arming screw. Uses standard mounting bracket provided on the parachute.
Mechanical Dereefer Model Data.
OPERATION: The device activates when the canopy of a G-11 A/B/C cargo parachute is deploying from the deployment bag. The device is mounted in the same brackets as the M-21 reefing line cutters, located on the standard reinforced panels near the skirt of the canopy. During the deployment phase, the arming wire secured to the deployment bag is pulled, allowing the looped ends of the segmented reefing lines to be free to dereef the canopy skirt. Two devices are required for the G-11 A/C and four devices for the G-11B cargo parachutes. Depending on the model, all devices have usable settings in 2-second increments. The dereefer device has a stainless steel shaft that retracts after a preset 2, or 4-second, delay per the packing manual used with the G-11A, B or C parachutes.
M-22 installed in original dereefer bracket.
Four M-22s installed in G-11B cargo parachute.
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