Swedish Rocket Knives

There are trends in YouTube videos among various video producers. A few weeks ago, it was all about fidget spinners until some niche tech blog ran that meme into the ground. Before that, the theme was red-hot knives cutting through stuff. The setup was simple; just heat a knife up with a blowtorch, cut through a tomato or golf ball, hit stop on the high-speed camera, and collect that sweet, sweet YouTube money.

[David] from RCExplorer.se isn’t like most YouTube stars. He actually knows what he’s doing. When the latest trend of rocket-propelled knives hit the tubes, he knew he could blow this out of the water. He succeeded with a fantastic rocket-propelled machete able to slice through watermelons and fling itself into the woods behind [David]’s house.

Unlike most of the other YouTube stars trying their hand at rocket-powered slicers, [David] is doing this one right. He’s using hobby rocket motors, yes, but they’re reloadable. [David] crafted an engine casing complete with a proper nozzle machined out of stainless for this build. The rocket sled itself is an aluminum bracket bolted to a piece of carbon fiber plate that travels down a rail with the help of four skateboard wheels. A machete is then bolted to the plate, which is propelled down the track a bit faster than 200 km/h.

When it comes to rocket-propelled knives, the word ‘professional’ really doesn’t come into play. This, however, is an amazing piece of craftsmanship that you can check out in the videos below.

Continue reading “Swedish Rocket Knives”

“Stupid expert” builds a machete slingshot for the impending zombie apocalypse

Sometimes people build things for the simple challenge of building. This is one of those cases.

The gentleman you see in the image above is [Jörg Sprave] of The Slingshot Channel. He is a self-proclaimed “Supid Expert” on the subject of slingshots and has taken his love of flinging things at absurd velocities to a whole new level.

His latest creation is a machete slingshot, which is really more accurately described as a machete crossbow. Measuring over six feet long, the impressive apparatus fires a specially altered machete with an insane amount of force using thick rubber bands. In the test firing shown in the video below, the machete is embedded up to the hilt in six layers of very thick cardboard, requiring quite a bit of work to remove.

As he states in the video while brandishing his bloodied forearm, building such a device is extremely dangerous, and should be limited to “Stupid Experts” . In no way should you attempt to build one of your own.

Continue reading ““Stupid expert” builds a machete slingshot for the impending zombie apocalypse”