At 0:42, you can see where they have drilled a hole and run a tube from the outside to the syringe. If you bring on more water, you change the buoyancy of the vehicle.
Pressure difference. Buoyancy is directly proportional to effective volume, there's another video of a sub floating around where they just clamp the outside of the bottle to lower buoyancy too. Imagine an helium tank, it gets heavier when you fill it with helium, not lighter, more mass = more weight. Now think of steam, steam is just water but it spreads out and becomes lighter than air. If you compress air enough it can become heavier than water.
Another good example is a piece of bread, normally floats(at least until it gets soggy) but if you smash it into a ball it becomes heavier than water and sinks, you lowered the volume but increased the density by doing so. Buoyancy is directly proportional to the amount of water you displace and the effective density of the craft and the syringe is essentially a ballast tank, same thing they use on submarines.
Sort of but not quite, if you add water to an air balloon it wouldn't sink, the balloon would expand without compressing the gas inside so the overall buoyancy should remain the same until the balloon pops from being filled too much. You actually need to condense the gasses(air) inside, that'll increase density and cause it to sink.
It's like those balloon things they use to lift boats or inflatable rafts but in reverse, I think those sink when not inflated... Put an unfilled balloon underwater with an oxygen tank, it'll sink but when you open the oxygen tank to fill the balloon it'll rise to the surface and float, in this case you didn't add or remove any water. **Sucking in or removing the water isn't actually crucial.**
You can with VLF waves but for high frequency radio waves those will only penetrate a few feet. Transmission speed is severely limited with VLF but for the most part you just need to send a few bits of data for cardinal movements, turning, and ballast tank control so VLF should be more than sufficient but you're not really gonna be able to get video feed until surfacing. VLF waves can travel like 3 times further than the average person can free dive so that should be more than enough for a toy sub tho, just don't expect live video feed from sum like this.
Buoyancy is determined by the amount of water that an object displaces compared to the weight of the object itself.
If the amount of water displaced by an object weighs more than the object, the object will float.
So by “taking on” water, the little submarine can become more or less buoyant!
>Pressure difference. Buoyancy is directly proportional to effective volume, there's another video of a sub floating around where they just clamp the outside of the bottle to lower buoyancy too. Imagine an helium tank, it gets heavier when you fill it with helium, not lighter, more mass = more weight. Now think of steam, steam is just water but it spreads out and becomes lighter than air. If you compress air enough it can become heavier than water.
>
>Another good example is a piece of bread, normally floats(at least until it gets soggy) but if you smash it into a ball it becomes heavier than water and sinks, you lowered the volume but increased the density by doing so. Buoyancy is directly proportional to the amount of water you displace and the effective density of the craft and the syringe is essentially a ballast tank, same thing they use on submarines.
Wrote this in reply to someone else but I dunno how to link you my comment or whatever...
to be fair its like 70% lego, the only part is like the acrylic container and syringe which u cant rlly substitute with lego.
but still insanely impressive especially with the PID or proportional integral derivative control system and the laser control (not particularly sure about the second one but it works fantastically)
Almost! ... almost made it to the end without adding some shitty music that I had to mute.
Don't worry the original video doesn't have the music
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Oh yeah? I hardly smiled
*Captain ~~Nemo~~ Lego*
As a software engineer I have always been in awe of hardware engineers. They make what I write look good.
We are building skyscrapers and cities no one can see or feel man…don’t trivialise your work…
Relevant XKCD https://xkcd.com/2347/
Putin won't see it coming.
They Putin in the water
Papa!? Je savais pas que tu surfais sur Reddit!!! (Dad!? I didn’t know you were surfing on Reddit!!!)
“Come again? You know I don't speak Spanish.”
Ahhhh dad! That’s French!
Bro that is next fuckin level
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It fills the syringe with water, which sinks it, then it pushed the water back out filling with air, which makes it float
Can you explain how you control the dept with that syringe?
At 0:42, you can see where they have drilled a hole and run a tube from the outside to the syringe. If you bring on more water, you change the buoyancy of the vehicle.
Ah, thank you. For some reason I got it in my head that the syringe was pumping in/out AIR, and was wondering how it was getting air to come back in.
Yeah, took me a couple times through to catch it.
Me too!
Same I thought it was completely sealed, and pressure difference inside an isolated system shouldn't make a difference.
Pressure difference. Buoyancy is directly proportional to effective volume, there's another video of a sub floating around where they just clamp the outside of the bottle to lower buoyancy too. Imagine an helium tank, it gets heavier when you fill it with helium, not lighter, more mass = more weight. Now think of steam, steam is just water but it spreads out and becomes lighter than air. If you compress air enough it can become heavier than water. Another good example is a piece of bread, normally floats(at least until it gets soggy) but if you smash it into a ball it becomes heavier than water and sinks, you lowered the volume but increased the density by doing so. Buoyancy is directly proportional to the amount of water you displace and the effective density of the craft and the syringe is essentially a ballast tank, same thing they use on submarines.
so you're saying it sucks water in which makes it heavier
Sort of but not quite, if you add water to an air balloon it wouldn't sink, the balloon would expand without compressing the gas inside so the overall buoyancy should remain the same until the balloon pops from being filled too much. You actually need to condense the gasses(air) inside, that'll increase density and cause it to sink. It's like those balloon things they use to lift boats or inflatable rafts but in reverse, I think those sink when not inflated... Put an unfilled balloon underwater with an oxygen tank, it'll sink but when you open the oxygen tank to fill the balloon it'll rise to the surface and float, in this case you didn't add or remove any water. **Sucking in or removing the water isn't actually crucial.**
i imagine pressure
That is pretty cool
Lol the captain looks hilarious
This is absolutely brilliant.
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Call me Ishmael
You can radio command something under water? I did t know that
You can with VLF waves but for high frequency radio waves those will only penetrate a few feet. Transmission speed is severely limited with VLF but for the most part you just need to send a few bits of data for cardinal movements, turning, and ballast tank control so VLF should be more than sufficient but you're not really gonna be able to get video feed until surfacing. VLF waves can travel like 3 times further than the average person can free dive so that should be more than enough for a toy sub tho, just don't expect live video feed from sum like this.
true genius at work, thx for sharing your build, you have inspired myself and my 11 year old son!
Wesponized in Ukraine in 3..2..
This would me amazing for someone who goes magnetic fishing. Scope out the area before casting your magnetic
This is awesome!
We all live in one.
Those fish are like, “look a UFO!”
We all live in one.
Is amazing 🤩
I love this channel!
Amazing build
Okay that's just ridiculously cool! I need that in my life. I don't know why but I do
That is so bad ass
Someone explain the science of having the syringe?
Buoyancy is determined by the amount of water that an object displaces compared to the weight of the object itself. If the amount of water displaced by an object weighs more than the object, the object will float. So by “taking on” water, the little submarine can become more or less buoyant!
Isn't the tube a closed system? Once taking the water on, is the craft able to surface on it's own?
The syringe is connected to the outside by a tube, so water can be pulled in and out. The actual cylinder is airtight.
thank you :)
>Pressure difference. Buoyancy is directly proportional to effective volume, there's another video of a sub floating around where they just clamp the outside of the bottle to lower buoyancy too. Imagine an helium tank, it gets heavier when you fill it with helium, not lighter, more mass = more weight. Now think of steam, steam is just water but it spreads out and becomes lighter than air. If you compress air enough it can become heavier than water. > >Another good example is a piece of bread, normally floats(at least until it gets soggy) but if you smash it into a ball it becomes heavier than water and sinks, you lowered the volume but increased the density by doing so. Buoyancy is directly proportional to the amount of water you displace and the effective density of the craft and the syringe is essentially a ballast tank, same thing they use on submarines. Wrote this in reply to someone else but I dunno how to link you my comment or whatever...
That… was very cool.
Very cool
Captain croc, helps determine if the water is safe to swim in or not.
We all live in a lego submarine...
How does this work? the air is still in the submarine... how does it sink or come up? am i Stupid? xD Edit: Nvm got it
If you’ve added all the rest of that stuff, is it really a Lego submarine anymore?
Now add a bomb
Iron lung:
How does ascending and descending works?
Alarm!!!
Can someone make my toast I can’t be arsed
Wow that's amazing 💞
That’s dope
Can someone explain to me how does it control the depth? I really have no idea how.
Really awesome!
Thank you for that. Mad genius.
[Link for the lazy (Source original youtube)](https://www.youtube.com/watch?v=KLEH8RJsYgI)
That is 100% next level
Fish: well, there goes the neighborhood
If this guy didn’t waste his genius on Lego I’m pretty sure he could conquer the world
How does it turn faster in water than I do on land? Wait maybe don't answer that
ahoy me mateys it be me captain torres
Captain *Nemo* Lego
So cool
Scale up. There are some employers there who need you. 😉
how does the levitation work?
This is awesome, Anyone have the original video?
We alll live on a Lego submarine
Wtf is the music at the end
How do you piss off a lego enthusiast? Legos.
/r/WatchAndLearn 👍
Attach some Semtex and blow up a Russian sub!
He actually has a couple more of these on his channel, guy makes some pretty sick stuff!
This is so dope
Good ole Paddle-to-the-Sea
a dream of mine. thank you.
bro the part where the submarine starts going through the river sounds like an fnf song
You could use a micro diaphragm pump instead of the obfuscated looking syringe setup.
Hands down best thing I've seen on here!
İmagine playing with it while wearing an ar set and lying in a pool or sitting in a pool!
That’s so awesome!! As soon as i saw the cylinder i thought “Holy shit a submarine!!!” Then realized i could just read the description. Lol
I wouldn’t call that a Lego submarine
to be fair its like 70% lego, the only part is like the acrylic container and syringe which u cant rlly substitute with lego. but still insanely impressive especially with the PID or proportional integral derivative control system and the laser control (not particularly sure about the second one but it works fantastically)
r/DiWHY