Rocketry

I saw this article about building a dual deployment device without black powder and thought that would be perfect for Project Overkill.

I didn’t build it exactly as explained in that article, but close enough. After building it I put in an igniter and tied it together with fishing line. Then I grabbed the shock cord and shook it like crazy. I wanted to see how it would react. The fishing line broke off all the pyrogen from the igniter. Were this a real flight, the main would not have deployed. I need to think about this design and rework it.

One thing I’ve done since that test that may help is build a guide for the fishing line that extends right up to and across the break between the two halves of the container. I’ve also added a tab near the bottom of one of the halves to try to keep them aligned a little better. Finally, I added some screws to hold the fishing line instead of just tying it on the back side. I’ll give it a go tomorrow night and see how it works out. I can’t try it right now because the epoxy is still wet.