On the launching page you’ll notice that the parachute deploys a tad early. It seems that the deceleration of the rocket after burnout makes the tumbler magnet fly up trough the tube hence triggering the deployment. I don’t think that can be stopped. Filling the tube with water or some other liquid would probably slow the tumbler effect to a halt. The alternative is slowing down the retraction of the trigger. At IKEA in the Netherlands we can buy dampers (?) that slow down a kitchen cupboard door when thrown shut. I made a new assembly with two of these dampers on each side of the trigger. It seems to delay the whole mechanism a bit, hopefully enough to gain maximum altitude.
I had to build a new nose-cone for this design and decided to put the inflight camera on the side instead on the top of the mechanism. The nose-cone turned out pretty good. Here the glue of the top is drying while the weight if the whole cone is pressing it into place.
