Rubber band powered bath Submarine

thingiverse

I had two plastic deep groove ball bearings (7 x 22 x 7) just collecting dust that I wanted to repurpose, my kids are tired of boring bath toys on the market so I decided to build a rubber band powered submarine myself. The hull on this one is actually my second attempt at it; the first was a simple tube design which worked perfectly but unfortunately sank like a stone. Print Settings: Printer Brand: 3D Systems Printer: Cube X Rafts: No Supports: Yes Resolution: 0.2mm Infill: 100% for Props & 25% for Body Notes: I used Kisslicer with CubeIT and adjusted skin thickness to 1.5mm, with two loops, a brim of 5mm x 0.5mm, and medium support. Post-Printing: Assembly: Insert the bearings into either end of the body after giving it a good clean-up. Assemble one prop using a thin rubber band. Pass the band through the bearings, then do the same for the other prop. Make sure the band is tight enough to hold the props securely in place. You might need to adjust your print settings to get the center of gravity and buoyancy right; but so far, mine works really well.