You should be able to put the plates into the system, but they shouldn’t be too small and should remain in place without any glue. After that, you can cut out two round base plates out of a thin plastic plate. It‘s maybe necessary to spray several coats. The spray paint can be applied as soon as the primer is dry. We recommend using plastic primer before applying the paint. First, sand and clean both the case and the door. If you want to paint your parachute system, you can do this now. One of these pieces will be the parachute door. The remaining cylindrical section will be separated in two equally large pieces. Now take the second bottle and remove both the bottom and the neck. You can either glue a half table tennis ball on top with epoxy or you can use the nosecone of a fireworks rocket for that. But of course, your case will need a nosecone. The bottle with the opening will later be the case of the parachute system. When you use bottles with a bigger or smaller diameter, you have to adjust the width of the opening. In this case, the opening is about 10 cm / 3.9” wide and there should be about 3cm / 1.2” left to the lower edge. Now you have to cut a big opening in the cylindrical section of the bottle. Cut off the bottom of one of the bottles using scissors and remove the thread of the bottle with a saw. It is necessary to use the same bottle type you have already used for your pressure vessel. But luckily, this shouldn’t be the case all too often since the two systems we want to show you in this video have already proven their reliability with numerous flights.įor the construction of the Phoenix 6 Side Deployment Mechanism you will need two bottles. Well, the answer is pretty simple: Mechanical systems are way easier to build and repair, are significantly lighter and a lot more affordable when compared to electronic ones – this is especially important when a rocket crashes and you have to build a new parachute deployment mechanism. You may wonder why we use these mechanical timers and don’t work with electronic systems. The modified timer will later be the centerpiece of the system. After that, bend the axel using two sets of pliers. You should also remove the plastic handle from the main axel by repeatedly clamping it in a vice. After removing the case you can cut off all protruding parts of the timer using pliers. Tommy Timers can be found in wind-up toys which are available in toy stores and on the internet. In this tutorial, we show you how to build a mechanical system based on a Tommy Timer. There are numerous approaches for parachute deployment mechanisms.
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