Hollow Pool Torpedo

thingiverse

I was impressed by Bcheirif's torpedo design and decided to print one for myself, which turned out well, but it is quite heavy and consumes a lot of material when infilled. As someone who values thriftiness, getting hit with it hurts my wallet, and I have kids at home, so I know that eventually they will get beaned by it. To address this issue, I created a hollow screw-together version of the torpedo, which can be filled with water to maintain neutral buoyancy while using less material. Furthermore, I printed the top of the torpedo in TPU, making it soft and reducing the risk of injury upon impact. You can print the top part in whatever material you're using for the body as well; however, be aware that it may not be as comfortable if someone gets hit by it. Despite this, I still advise against throwing the TPU version at people on land. In water, though, it glides smoothly and doesn't cause much discomfort. To add an extra layer of customization, I included an M5 threaded hole in the top cap so you can screw in an M5 bolt and attach nuts to adjust the buoyancy. For printing purposes, I find it best to use a raft for the bottom of the torpedo due to its limited contact area with the bed. This setup allows the torpedo to glide more smoothly through the water by reducing trailing vortices. Conversely, when printing the top part, I don't use a raft, and neither part requires supports.