Mark Rober is an inventor, YouTube personality and former NASA engineer. And now he can add "creator of the world’s biggest Nerf gun" to his resume.
With the help of his friends Ryan and David from Eclectical Engineering, Rober has managed to build a gun that shoots darts at about 64 km an hour. This device is so powerful, they wrote a safety disclaimer warning people about its use, should they choose to build one of their own.
The source of the gun’s air comes from a 3000 psi (pounds of pressure per square inch) paintball tank. To let the air into the firing chamber, you pull the trigger forward. You then pull the trigger back to allow the air out into the main cylinder, and fire a dart. The small silver cylinder (firing chamber) regulates the air to 80 psi per shot, so you get about 20 shots out of a single tank of air.
After you shoot the first dart, you rotate the cylinder and you can shoot five more times. The darts are made of pool noodles with a toilet plunger on the end, so they can actually stick to things (as demonstrated in the video below).
The three men proceeded to test how far the gun can shoot with a 3D-printed projectile dart. They were amazed to see it travel 118 metres. Rober also had to "defend his honour" and test it out in 'real life' during a Nerf gun battle against his nieces and nephews. Guess who won?
If you'd like to try your hand at this, there is a blog post on Eclectical Engineering website with instructions. And if you want even more gigantic Nerf action, see this video where they load it with black powder and demolish watermelons. Engineers sure know how to build awesome toys.