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The Hacksmith Boat-Mounted .50 Cal Coilgun
2019-05-02 | By The Hacksmith
License: See Original Project Arduino Teensy
This project was created by Engineering Superheroes of Hackmith Industries.
DO NOT ATTEMPT to Re-Create
Over the past few years, the Hacksmith team has made some eye-popping creations that are powered by electromagnets. The newest addition to the family is a coil gun… on a boat! This coil gun-boat was designed by Charles, a student at the University of Waterloo. See how it was made and watch it shoot chunks of metal at various objects (and of course, Thanos) in the video below!
How Does It Work?
You might remember the Railgun made on Maker.io last year. A coilgun is similar to a railgun: it uses electromagnetism to propel small metal objects through a barrel. The primary difference is that a railgun uses two rails to propel objects while a coilgun uses a series of coils. There are a few other differences that make a coilgun more difficult to successfully fire -- we’ll get to that soon.
A visualization of how electromagnetism propels a projectile through a railgun.
A diagram of the coilgun design.
This coilgun is a bit more tricky than a railgun because it requires multiple sections to turn ON and OFF at very precise times. A railgun simply uses one big burst of power to launch a projectile; a coilgun uses a series of electromagnetic coils. These coils can only pull a ferromagnetic object towards their center, so it takes some ingenuity to make the object go forward instead of just float around in the center. Each coil must be separately powered ON and OFF at exact times to make the object shoot in the correct direction. If the coils are powered OFF too quickly, the projectile will lose out on power, but if the power stays ON too long, the projectile can shoot backwards!
Designing the Coilgun Barrel and Circuit
The coilgun’s barrel consists of a clear plastic tube surrounded by 8 sections of coiled wire. Each section is powered ON and OFF by a small custom PCB. The timing for all of these is controlled by a Teensy 3.5 microcontroller and can be adjusted in the Teensy’s code. There was some trial and error with this project, but it ended up working quite well against Thanos, soda bottles, and much more!
Behold! The final design of “Boaty McGunFace!”
More Fun with Electromagnets
You can find more Hacksmith creations using powerful electromagnets on Maker.io! Be sure to check out the Hacksmith’s Youtube Channel for more projects from the “Make it Real” series.
- Making a Charging Circuit for a Railgun
- Electromagnetic Climbing Clamps
- Electromagnetic Hammer of Thor
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