Gas-powered water gun #tinkerfun

myminifactory

This object was made in Tinkercad. https://www.tinkercad.com/things/eC4zlB6Ko6F Description Here's a shout-out to everyone who skipped buying a water gun this season because they invested their entire budget in a 3D printer. Instead of using the traditional hand-pump method for pressurizing the water, which would be significantly less reliable when 3D printed, this version uses an aerosol can of high-pressure gas to expel the water. When you pull the trigger, this gas will pressurize the water supply, forcing water out through a thin tube. This means that you won't need to manually pump up the water supply and also makes the gun much less complicated. How to Use it To make it printable, I broke down this gun into a trigger, grip, body, and intake tube. To store the water, you'll need a 20-ounce soda bottle (the thread type is PCO-1881), and for the air supply, you'll need a can of keyboard cleaner (connector is sized for Falcon Dust-Off cans). The intake tube fits into a similarly-sized hole inside the bottle connector, the grip fits into the octagonal hole, and the trigger fits into the small hole next to it. Make sure to nest the trigger inside the grip before attaching to the body, and use a little bit of super glue to attach each part. Pry off the cap from the can of keyboard cleaner and snap it into the round connector at the end of the grip. The short plastic tube on the can should line up with the hole at the end of the trigger piece. When you pull the trigger, air should come out of the bottle connector. If so, fill up the bottle, wrap some Teflon thread tape around the neck, screw it in, and try not to annoy your neighbors too much. How You Can Improve It To my knowledge, this gun is still very inefficient due to various factors, such as the size and shape of the tubes, lack of airtight seals, and the fact that the bottle connector I'm using doesn't work very well. I encourage anyone who takes interest in this design to try mixing it up to make it better.