Hydra 58 Model Rocket Project: Part 1

Complete with spring loaded folding fins as well.

Hydra 70.png

So I have been building model rockets for a while now and I just recently built and launched my first folding fin rocket, the FlippinFin from Aeroconn systems. It has a few problems, its tiny, there are only a few kits left before they are sold out forever, and it technically isn’t allowed to fly under the rules of NAR or Tripoli. To solve this I decided it was a good idea to make a bigger, faster, higher flying replica of a Hydra 70 dumb fire missile (Hi FBI and people, whats up?).

So I have the thing designed, its pretty simple, just needs a 3d printed nosecone, fiberglass body and motor mount, as well as a few 3d printed parts for the fins and assembly. The current plan is to take a length of fiberglass tube and cut it into 3 sections. These three sections will have a carbon fiber tube the same length of the fiberglass fin and a brass tube inside of the carbon. this will make the fin assembly which will then pivot on a length of music wire.

Will this whole crazy plan work? No idea but it will look cool either way. I’m going to be ordering the 54mm tube tonight so hopefully I can have some fins put together in the next few weeks or so.

Oh, one more thing…


Because this is a folding fin rocket, it will be tube fired. While I can just strap a regular cardboard tube to the launch rod, I decided it would be much cooler if I make a replica LAU-131/A 7 (the above shows the 19 tube, I will be making the 7 tube version) launcher that will be strapped to the launch rod instead, even though I will only make and launch one of these crazy things.

Capacitive sensors are… the worst…

So If you haven’t seen it before, this is the arcade controller I have built for the game that has been controlling my life. If you can see, there are a whole lot of little blue arrows near the top that don’t look like they are good for sliding the hand across.


I have been working on a more accurate design so I thought, “Why not use arduino and a whole bunch of confusers all wired up in some convoluted way!” So I did..


Shes no prom queen, but even the ugly girls… After a few hours of laser cutting, cleaning, sticking tiny pads of copper, stripping a metric crap ton of wire, and soldering it up all nice, the thing doesn’t work for squat. The wires may be too long, pads too close, or whatever but it does not sense through the acrylic and barely senses when touching the bare copper. My next plan is to re make this same board but with the wires as short as physically possible, no wires touching each other, and maybe if the stars align I will have it working enough for writing the code.