DM-500
The FXC Dereefer, model DM-500, Part No. 811-00289, is a 100% mechanical mechanism designed to accommodate a wide range of cargo parachute types and sizes. It is specially designed to be a “re-usable” substitute for the “use-once-and-throw-away” M-21 pyrotechnic cutter.
The DM-500 has been designed to fit perfectly into the existing M-21 mounting bracket, no modification required. The timer offers a choice of preset delays of 2 and 4 seconds. Access to the timer's external setting screw is quick and easy. The timer mechanism is sealed against all outside elements. The internal subcomponents require no maintenance and are corrosion-resistant throughout.
PART NUMBER :
821-00289
WIDTH :
1.75 Inches (4.445 cm)
LENGTH :
4.25 Inches (10.795 cm)
DEPTH :
1.00 Inches (2.54 cm)
WEIGHT :
12 ounces (300 grams)
TIMING :
2 seconds with a tolerance of ± 20%
Description
The Dereefer mechanism consists of an aluminum housing with two steel latches. When closed securely, the latches capture the loop ends of the parachute canopy reefing line. The reefing line is released only when the timer mechanism triggers the steel latches. The timer has a choice of preset delays of either 2 or 4 seconds. The timer is manually reset before each use and activated by a lanyard pulled during the parachute cargo drop. External access to the timer to change the delay setting is quick and easy.
