LEGO Technic RC Submarine Mk II - Build and Test
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- Опубликовано: 29 сен 2024
- Project Submarine Mk II
It's been almost four years since I built my first generation submarine so it's time to upgrade the design and make it better. My Mk II sub features a new sexier design that resembles a spaceship, dual horizontal thrusters that control the sub's forward/backward motion and turning, and dual vertical thrusters used to control the sub's pitch angle. The ballast weights sit in a much lower position than in Mk I, with some weights sitting in the sealed compartment of the sub, and some in a central "spine" situated on its underside, to achieve a low center of gravity for better stability.
I hope you enjoy the video as much as I enjoyed designing, building, and testing the sub!
Submarine Mk II specs :
Horizontal thrusters : 2x LEGO power functions L motors
Vertical thrusters : 2x LEGO power functions XL motors
Control : 1x BuWizz 2.0
Remote Controller : Google Pixel 6a
Footage was shot on Google Pixel 6a smartphone (build process), DJI Action 2 (onboard), LG G6 smartphone (tripod sea trial shots), and DJI Mavic Mini drone (aerial shots).
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#lego #legotechnic #rc #afol #adultfanoflego #legopowerfunctions #powerfunctions #technic #legolife #legomania #legorc #asmr #engineering #concept #testing #experiment #dji #action2 #djiaction2 #legosubmarine #rcsubmarine #submarine
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Way better than OceanGate...very cool!
Thanks! 🙏
For my third generation sub, I'll probably 3D print individual water tight cases for each motor and the electronics. This way it will be much more reusable and versatile.
For the fourth generation I'm thinking of strategic missiles...
You are a very brave person.
Sealing everything with an LDPE-Film to glue strip. PE does not adhere at all. ABS (Lego material) does, bit not PE
Did it work well for a longer time?
When you have corona pre treatment (for printed LDPE film required) film it will adhere, but without corona pre treatment not.
It worked for a total of 30 minutes in water. 5 minutes bathtub test and after a week in the basement went for sea trials. 10 minutes testing and final weight balancing (salt water is more buoyant so I added some ballast), and 15 minutes shooting the video.
After that I partially dismantled it onsite to make sure the motors and electronics were dry. Thankfully only a few drops of water found their way in.
For my third generation sub I'd like to develop a craft that can dive deeper without taking water in.
Great!
Thank you!
Could the Mk lll have neutral buoyancy? Ballast tanks with valves and pumps to let in water and air. The air could come from a long, floating snorkel? I would have suggested some sort of small, compressed CO2 cartridge, but that would be pushing it...
There are lots of things to develop and your ideas are things that have troubled my mind as well. The CO2 canister was a solution that came across my mind as a former cyclist (we used small canisters to quickly inflate flat tires), and I later developed the idea of using an aluminium water bottle filled with compressed air (again, as a former cyclist I have a pump that goes up more than 250 PSI). However, my first concern is developing a more reusable way to seal the boats motors and electronics, that can also dive at 10-15 meters without taking in any water. The more complex systems will probably come with Mk IV.
I know I said this in the last video, but what if you got a Lego city Ship hull And use that as a base for the Lego pirate ship?
Wonderful work, I'm so surprised you got it so watertight!
Thank you! 🙏
Very 😎 🆒️ a camera for the ground would be interesring.
It would, but it's dangerous in shallow water. I could smash it if the boat hit the bottom hard enough (it did during my initial diving tests).
So you've beaten the water, the land, including chasms, how about taking to the air? Like a zeppelin in a gym hall?
I actually haven't thought of a zeppelin. I've thought of an ultra light with RC ducted fans and a rocket...
@@brickandgear As a kid i had a lego technic ideas book with a small zeppelin on the back, and the idea has stuck with me ever since. You'd have to calculate the size of the balloon and the frame holding it in place, but i suppose you could weigh it down if it has to much buoyancy. And then propellers for thrust, engines will be heavy, requiring a bigger internal balloon... Could be a fun build!
@@MarijnRoorda it will certainly be a fun build! Its only downside is I'll have to find a small stadium to test it!
:)
It looks incredible
😁
Nice work
Thank you! 😊🙏
Just thought of an interesting build challenge. A sailing ship with fan folded collapsible sails, that can be repeatedly raised, lowered and angled. Of course, the boat having propellers if the wind is unfavorable... 🌬⛵️🌊
Your idea has taken its place in my ToDo list...
@@brickandgearthank you! That is very kind..🙂
Πολύ καλό
Ευχαριστώ! 😊
there is no way the tape and gel trick work!!! like...there was no water ingress at all?!
At surface level there is no water ingress. The deeper you go, some water finds it's way in the compartment, but it was just a few drops after almost 15 minutes in the water. You have to be very careful during the sealing process though. Use a lot of heavy duty tape and leave absolutely no gap. I obviously didn't show the entire process in the video. I couldn't film and pay attention at the same time.
@@brickandgear thanks for the info!!! That's just crazy
No problem. A faster and more secure way is to use a whole ziplock bag without slicing it open. Put the compartment inside and use the ziplock to seal it up. You get more trapped air inside though and it's harder to balance the boat.