CO2 Pool Torpedo and Launcher

Model This model consists of a three piece torpedo that houses a 16 g CO2 cartridge and ballast holder. The launcher is built with a few bits of hardware and is used to puncture the CO2 canister and launch the torpedo underwater. _The torpedo won't harm anyone, but be cautious around the launcher (sharp object) and CO2 gas (high pressure and cold)._

_Update: I've also added alternative top and lower sections by request that are extended so that the torpedoes will float rather than sink (untested)._

Check out the Build Video (https://youtu.be/VAyJWpTFGtY) for assembly instructions and to see how they perform.

Print Settings - Print all parts in their original orientation. - Torpedo parts: 0.2 mm layer height, 40% infill, no supports (rely on bridging) - Torpedo - Ballast Holder: Print two of - Launcher - Housing: 0.2 mm layer height, 40% infill, supports (touching build plate and increase overhang angle to 80 degrees to avoid supports on outer threads, or use support blocker) - Launcher - Nail Holder: 0.1 mm layer height (smoother action), 40% infill, supports - Other launcher parts: 0.2 mm layer height, 40% infill, no supports Launcher - Spacers: Print if required to add preload to spring (two sizes to choose from)

Hardware Required - 16 gram disposable CO2 cartridges - 1 x M3 x 20 mm machine screw - 1 x M3 x 4 mm heatset insert - 1 x 12.7 mm x 38.1 mm x 1.041 mm compression spring (or similar diameter and use spacers) - 1 x 50 mm x 3.3 mm nail (concrete nails are good) - Fishing sinkers for ballast (or anything else that you can stuff in the nose cone)

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