I 3D Printed The WORLD FIRST PROPELLER And Build an RC Boat With It
Вставка
- Опубліковано 26 чер 2023
- PCBWay Your 3D & CNC One-Stop Solution: www.pcbway.com/
In this video, I experimented whit historical ship propellers. Back in the day, the propellers were not like we know them today, they were screw propellers. How they performed on RC boats?
________________________________________________________________
Follow me also:
MY PATREON PAGE: / letsprintyt
Facebook: www. letsprintyoutube
Instagram: / letsprintyoutube
________________________________________________________________
You should put the screw propellers in a tube and see if you get more thrust
The screw propellers are actually an excellent choice to use for boats, your just using them wrong, if you look at those invention diagrams a little closer that you showed, you will see that the screw propellers ar inside of a tube, this is also the same process used on jet ski and jet boat propulsion, you did not put your screw propellers in a tube, that's why you had all those issues, and kept flipping over, the thrust needed to be directed to the rear of the boat, but without putting your screw blades in tubes, the water extends outwardly away from the blades as they spin, so the concept is good, 👍 your application was bad 👎🙄
It's nice experiment, but you actually went 184 years backwards. Because today's propeller is practically a cut off 'slice'of Archimedean screw. It was done this way to save weight and increase efficiency.
DID YOU KNOW: the first vessel IN HISTORY to be fitted with a screw propeller was the SS Archimedes of 1839.
Ark-ah-me-dees
Screws going the length of the vessle seem like the ultimate land/water propulsion system if you have an insane power to weight ratio
Scrolled a long way and didn't see many people saying.. You
The reason the boat keeps going on its side is because both propellers are producing torque in the same direction. They need to be going in opposite directions just like the props on a twin engine motor boat, with the top of both props rotating outwards.
Archimedes would be proud!
I've been working on my own BLDC motor controller for a while now, and it's astonishing the ESC worked with two motors attached. The way they work is by listening for the back EMF from the phase that is not energized to know where the position of the motor is in order to advance to the next phase. If you have two motors, you also have two back EMF signals mixed together. It probably works because the motors are the same size, therefore they can get into lock-step with each other. It's really fascinating! If you would have asked me before seeing this video if you could drive two motors from the same ESC I would have said no way!
Your boat is undriveable because your steering is right in the wake of your 2 screws in very turbulent water, especially at high speed. If it capsizes when you go full throttle, it's not because of the speed, it's because of the acceleration and the torque. If you were accelerating more progressively, it would probably work better, although the water wall would always end up making the rear faster than the bow and make it capsize in a way or another anyways.
Duct the screw. The Archimedes screw works better when enclosed.
Your boat is missing some sort of Keel to keep it moving straight. As for steering your propellers are creating so much turbulence behind the boat, the rudder wont work, the reason it works in reverse is because the rudder is actually doing something. I believe many ships like this had a rudder behind each screw like a sub to control the direction of the water flow coming off the props. These small changes could help solve your troubles
Tips:
Very cool concept and I'm glad someone tried it.
With all your experience printing pumps, can't wait for you to do something like this with a pump for jet propulsion like a jet-ski. I hear they usually use impeller pumps but not entirely sure. Prolly depends on the jet-ski. Slapping a super heavy (like steel or brass or something) thick fin, aka a "keel", under the boat would make it a million times more stable I'd think.
Lots of fun playing with boat designs, there was a successful version of screw drive where the screws were mounted up into the hull with only half below the hull surface and independent motor control for steering.
in the future you can increase stability of small boats with a keel(hydrodynamic or weight), outriggers, or a catamaran design. to increase rudder authority you need a larger control surface. alternatively with a dual thrust system you should consider using thrust steering at least at low speed where the rudder will have least effect
Fantastic work, dude! Nicely done! 😃
I do love your videos bud please make more. Your wacky inventions are bloody great 👍.