A DIY YouTuber has built the world's smallest 100-HP jet boat
But is it capable of traveling in a straight line?
Here is the Jet Boat 101 that no one asked for: In case you didn't know, a jet boat is a craft that is powered by a jet of water released from the back of it. The modern jet boat was invented in the mid-1950s by an engineer called Sir William Hamilton, who wanted to build a boat that could travel up New Zealand's rivers that were too shallow for propellers.
A jetboat, unlike a powerboat or motorboat, takes water from beneath the boat through an intake and into a pump-jet within the boat before releasing it out a nozzle at the stern. They are very maneuverable, and many of them can be reversed from full speed and brought to a halt in less than their own length. They are impressive, to say the least.
Luckily, there is no engineering limit to the size of jet boats. The largest jet-powered vessels are used in military applications as well as the high-speed passenger and automobile ferry industries. But what about the tiniest? You can watch the video embedded above to see a YouTuber from Grind Hard Plumbing Co fabricate the "world's smallest" 100-horsepower jet boat.