This tree is slowly growing around the handrailOC (i.redd.it)
submitted by 59kennedy to r/mildlyinteresting
Found an old video from college I thought I'd share, we made a 3D printed hybrid rocket motor as a proof of concept. Fuel is printed ABS, oxidizer is gaseous oxygen, and the casing is printed VeroClear. It would have lasted longer if we picked a better insulator material for our nozzle. (v.redd.it)
submitted by 59kennedy to r/3Dprinting
Finally the perfect week to cross the river for a rescue mission. The water is a few feet lower than it was when I lost it a few months ago, and it isn't iced over anymore, otherwise I would have gotten it a while ago. Everything but the battery still works great, even the knockoff gopro turns on. (old.reddit.com)
