Watch this laser-guided knife throwing machine nail 10 in a row

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Watch this laser-guided knife throwing machine nail 10 in a row
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Uncanny accuracy

set out to build a gadget that can accurately throw knives just like a pro, nailing a target 10 times in a row at different distances. That meant painstakingly calculating how to spin a knife the right number of times to land tip-first, again and again and again — and employing a homemade lidar laser guidance system to measure that distance and adjust the knife’s trajectory accordingly.

Otherwise, a knife might harmlessly bounce off the target... just like mine did so many times at the last Renaissance Faire I attended. The final contraption dispenses upwards of 10 knives from an integrated, spring-loaded magazine onto an electromagnet attached to a carriage, which zooms forward along its track at 10 meters per second thanks to a pair of motorized belts, which are in turn powered by a pair of 36V hoverboard batteries. Once the carriage reaches the midpoint of its track, the electromagnet is programmed to release the knife — letting it hit a target up to 15 feet away.

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