This is the device that ensures a correctly timed opening of the parachutes. It is first activated when the parachute unfolds, and the suspension line pulls a plug in the bottom. after that, when the reefing line has tightened, it will wait a predetermined time before it cuts the reefing line. This video shows how the timer is activated by the pull of a suspension line.
Some weeks ago we hosted a public debriefing event in Copenhagen. In this third video Flight Director talks about the Nexø II flight profile and lessons learned from the flight.