Submarine

thingiverse

This is a submarine I made for my physics class :) each opening on the top goes into a compartment meant to store acetic acid and sodium bicarbonate. The acetic acedic is kept in a balloon inside the compartment and would be popped with a pushpin through the holes on the bottom. Balloons would be tied to the openings on the top prior to the reaction and they would fill up with CO2. Then the the submarine will float up after being fully submerged in water. I used supports when printing but only for the outside not the inside using the print setting "Touching Build Plate". For infill I used 10% because I wanted it to be as light as possible but if your printing it for the sake of submerging it I would recommend using a higher percentage to it says underwater.