Mini Rear Eject Bomb Rocket

thingiverse

These mini rear eject bomb rockets are specifically designed to fly using Estes 13mm motors, and work best with A3-4T and A10-3T models. They may be too heavy for the 1/2 A's. The rockets have an inner motor pod that pops out of the bottom, causing the whole thing to fall nose first, just like a bomb is intended to do. To build these mini rear eject bomb rockets, you'll need some Estes BT-55 body tubing for the bodies. I used 100mm of this tubing for the "F-bomb" variant and slightly less for the red one, which was made from scrap tube that I had left over. In my original designs, as shown in the videos, I used two streamers for recovery. One streamer was attached to the rocket itself and another to the motor tube. However, this caused the rocket to come down pretty fast, which could have destroyed it if it landed on hard ground. It also posed a risk of injury if someone got hit by it. To fix this problem, I plan to re-design my rockets so that the kevlar line runs from the rocket to the motor tube and then to a small chute, causing the whole assembly to come down in a straight line. A 6" chute should be sufficient for these small rockets. I flew both of these mini rear eject bomb rockets using A3-4T motors, and they performed very well. If you want to see them in action, here are some links to videos I recorded of the flights: Red Mini Rear Eject (https://www.youtube.com/watch?v=JJat4l0W_p8) and Black Mini Rear Eject (https://www.youtube.com/watch?v=0pbarU0r9RI). UPDATE: I've since changed the configuration of these mini rear eject bomb rockets to use a 6" chute with the motor tube running in line with the rocket, as shown in the photo. This change was made because they were dropping just a little too fast on streamers alone. The problem wasn't due to weight, but rather because they come down nose first.