Mini M&M Rocket for 18mm Motors

thingiverse

I've created mini M&M rockets for 13mm motors using the design from Thingiverse (https://www.thingiverse.com/thing:3941671), but wanted to try them with larger 18mm motors instead. To be honest, I suspected that the heat generated by the motor would warp the body tube, but it actually worked flawlessly. Build notes: 1) Print all parts and make sure to print the nose cone with a 30% infill setting so you don't need to add weight. 2) Cut the mini M&M tube at the seam on the bottom, remove the flip-top lid, and then cut off the ridge at the top that the lid used to stop against. 3) Attach a kevlar shock cord through the hole in the top of the fin unit. 4) Epoxy the fin unit into place with the shock cord passing through the tube. 5) Epoxy down the fins, and make sure to fillet them with epoxy for extra stability. 6) Use nomex cloth for wadding and run the shock cord through a slit cut in the middle of it. If you want to do this too, now is the time to do so. 7) Tie the shock cord to the nose cone by threading it from one wedge-shaped cut to the opposite one. 8) Make a loop in the cord near the nose cone for the parachute. 9) Attach a 9" or so parachute and you're ready to launch. 10) Launch and enjoy. I've only tested this rocket on an A8-3 as shown in this video (https://www.youtube.com/watch?v=GjYxiIUs168), but it should handle up to a C6-7 motor.