Non-Contact Underwater Propeller Drive - Building a Print-in-Place Sea Scooter (Part 2)

[@mkstewet2]

You should also consider a thrust washer inside the propeller drive. Great design ! ! !

[@SnakebitSTI]

Important consideration: The toroidal propeller looks the coolest!

[@vichav3167]

Great design! How about wireless charging, wireless flashing firmware(arduino with rf module(aka wireless uart) flashing arduino for example), and Reed switch for turning on and off? Rheostat can be changed into series of reed switches to make different throttle too. No holes in hull at all. Propellers have different efficiency on different rpms, just like electric motors, so making reductor, motor and propellers' size to match with max torque that reductor can give will result in max pull.

[@DesignedtoMake]

Great suggestions. Some of those solutions might well appear in the design. The one that I had absolutely not thought of was the reed switch quantised rheostat. I almost certainly will give it a go. Many thanks!

[@whattheheckisthisthing]

The 100% print in place requirement is feature creep. You can chemically bond most plastics with the proper type of adhesive.

[@jmckittrick1]

Great video! Really, great application of science and engineering.

[@DesignedtoMake]

Thanks 😀!

[@الدعوةالىالله-خ8م]

@@DesignedtoMake 1-everlasting Allah He has always existed and always will exist. 2-He has no beginning and he has no end. He is eternal. 3-He always has existed and He never was created, as He is not like His creation, nor similar to it, in any way. 🌍 The concept of God is summarized in the Quran as: I seek refuge with Allah from the accursed satan 📖 { “Say, He is God, the One. God, the Absolute. He does not give birth, nor was He born, and there is nothing like Him.”} (Quran 112:1-4)

[@paulroberto2286]

Awesome project! I'm excited to see how you handle the control signals in pt3, since 2.4GHz radio waves don't penetrate water well.

[@kyle-geniusn-h2038]

I was wondering when someone would make a video on this topic because I had this idea for a very very very very very very very very very very long time

[@ua420]

Cool project. I wonder if testing in constrained container different to real body of water.

[@DesignedtoMake]

Thanks! I think/hope it should perform better in a real body of water ( less turbulence etc). The question of how the thrust changes with speed moving through the water will also be interesting to see.

[@PhilipDolan]

Nice video for the new year! 🎉 Great progress on the project, think the toroidal design is deffo a good way to go.

[@DesignedtoMake]

Thanks!

[@rheticus6673]

My first thought was to use the system that submarines use to transmit power thru the hull and encapsulate both prop and hull assembly

[@DesignedtoMake]

That’s a very interesting idea. 💡

[@rheticus6673]

@DesignedtoMake qi charging circuit may be easier than ultrasonic power transfer

[@HanZie82]

Really awesome video, well thought out and clearly commented. Audio sounds great, but the picture could use some color grading (maybe)? (But then im no expert, but can clearly see some parts where way over-lit). But the graphics/drawings where a great addition. Thanks for this video!

[@goldengatevideoproductions7160]

Very cool project! When you get to a final (or final-ish) version will the files and information be available for us to build our own?

[@DesignedtoMake]

Glad you’re enjoying the build! That is the plan. Just setting up a site to host the project(s). And deciding on how best to make them available.

[@wesdiezy]

You really should try the test again with all of the blades well below the water line. The longer narrower blade will be much more efficient than the toroidal propeller. Its just that the cavitation from the blades leaving the water ruins the whole experiment.

[@DesignedtoMake]

Totally agree - this along with having a go at optimising a few other aspects such as prop scaling factor, improving surface smoothness and possibly using a more ridged material to print the props with might be good to try in future. But the toroidal prop really was very quiet!

[@christopherd.winnan8701]

Get ur smugglers on and try it in the pool!!

[@ahmedmonjid5696]

beautiful content. all the best of luck

[@DesignedtoMake]

Thank you so much 🙂

[@BartJBols]

The chance of consistently choosing the wrong direction 4 times out of 4 is 1/8

[@DesignedtoMake]

Very True😀. I’ve just realised that i didn’t mention that the issue was that two of the props were clockwise and two counter clockwise, rather than me putting the terminals on back to front. So the probability of selecting 4 propellers from a bag of 20 ish propellers where two of them are clockwise and two counter clockwise and then randomly testing them in alternate order is I think at absolute best 1/16. I certainly felt unlucky at the time 😀!