There’s no denying the engineering and building skills of YouTube’s The Practical Engineer. But it’s the “practical” claims we feel the need to question because as impressive as this invention is, does anyone actually need a handheld blaster that can hurl playing cards at speeds over 200 kilometres per hour?
The video goes into quite a bit of detail about how this contraption was built, but there’s even more information about its design and engineering over on Emiel’s website. The battery-powered blaster uses a pair of motors; one that grabs a single card from an inserted stack and a second, spinning at speeds upwards of 25,000 revolutions per minute, that works with two high-speed bearings that launch the card with a spinning motion to improve its speed and stability in the air.
It was a build inspired by a similar creation from