A screw propeller-driven pump jet for boats. It is a new design with a reverse feature.
About this creation
I have been experimenting with some running hardware for my boats recently, and I came up with this. It is a pump jet, like the ones you see on jet-skis and river boats. It is built with, oddly enough, a jet engine housing off of an airplane. The water intake created by the propeller (It is acting like in impeller in this case) gets directed into the wide end of the nozzle and the main ring exhaust and center water outlet greatly increases the motor's thrust output. The center pin-hole/ring (where the turbine compressor goes for the jet engine) is also an anti-cavitation ring. The propeller intake acts like a blower and collects any air bubbles in the center and forces it out of the nozzle. The propeller cone is also close to the anti-cavitation ring, and therefore, decreases the cavitation and increases propeller flow. Another perk of this motor is the fact that it has a one of a kind feature, a reversing bucket. If you have ever seen a real jet nozzle, you may notice a large clam-shell looking device mounted on the top of the nozzle. This is a reversing bucket, and it works by diverting the forward flow from the pump backwards. Jet pumps can't operate in reverse just by switching the rotation; they are always operating forward. I noticed the fact that LegoŽ motors can't operate in reverse without switching the battery around, and I didn't want to do that, so I designed the bucket. It attaches to the plate on top of the jet nozzle and is made out of a half of a fuel tank. It works by taking the forward thrust from the pump and diverts it backwards from both sides. It works great on boats. Note: This motor does not work well on larger hulls. (Must be mounted on rearwards motor mount)
Thanks for checking my account! The motors are so rare that on any moc-sharing website I've only found 3 people that even knew about them. I'm pretty sure i'm the only person on here who owns more than one.