Plenty of people have proven that shooting down a drone is as simple as pointing a shotgun at one and pulling the trigger, but there’s more than one way to skin a quadcopter. While the military experiments with jammers, and the Dutch are training eagles to do the deed, the folks at Make It Extreme have their own method: a DIY net gun.
The gun has a very simple principle. Using air pressure and four barrels, the gun shoots a net that is weighted on its four corners directly at the drone in question. A direct hit tangles the drone and brings it down hard, but without completely destroying it. After all, drones are pretty tough.
Just remember, actually shooting down someone else’s drones means you are meddling with aircraft and that is technically a federal crime.
Given that this design requires a lot of metal and machine work, it’s not quite DIY for the average tinkerer, though it probably wouldn’t be too hard to bring this design to life using materials that are easier to work with like wood and PVC. For further simplification, it need not even be a net that you fire—we’ve got ample proof that a cloud of streamers is more than enough to tangle any drone that gets too close. So if you’re looking for an engineering project to sink your teeth into, the homemade drone chaff gun is just waiting to be invented.
Source: Make It Extreme