This Evolved Reefing Line Cutter (ERLC) is a mechanical lanyard pull device. The modular design allows options for time delay period up to 7.0 seconds and different guillotine configurations for severing a target. The ERLC functions with the application of a nominal 45-pound actuation force, the internal firing pin is retracted and compresses a spring. At a specified release point, the spring expands driving the firing pin assembly into a percussion primer. The percussion primer fires and ignites the time delay. After the delay, a propellant charge is activated driving a blade through the Kevlar or nylon cord target. It is capable of severing 750 LB Nylon and 750 LB Kevlar cords. The conversion to an electrically fired option is available upon request.
Our previous experience with Reefing Line Cutters was on the Space Shuttle to un-reef the recovery parachutes of the Solid Rocket Boosters. These cutters were quite large and had multiple time delays. We have a long history of providing guillotines / cutter and time delay devices and reefing line cutters are just a marriage of these two elements. These devices are in fixed wing and rotary platforms like F/A-18, F-15, F-16, AV-8B, T-45, H-60 Blackhawk, AW101 and many others. Currently, a design of our ERLC is being tested by Martin Baker Aircraft Company in an ejection seat Drogue Parachute.