3D Printed CO2 Pool Torpedoes 

These do look like a lot of fun by themselves! But as you said, it only gets better when you mount it to a an RC model. Can't wait to see what you do with these! Loved the video!

I'll tweak the fin design to a spiral, to achieve some kind of stabilization

Isn't that pollution?

harass the wildlife at the local lake

I would fill them with high explosives and have a scale submarine battle

in theory, you're right..but limited by 3d printed plastic ..depending on quality but it will just explode instantly due to extreme pressure if u want make smaller nozzle

It would explode if the gas could not get out quick enough

@@ONLY-DANlEL I understand that PLA Plastic has its limits. But also the nozzle diameter could have been made a lot smaller. When you look at the video the diameter is huge which is why all the gas releases so quickly and why it doesn't go fast or far. I understand a tiny nozzle would totally destroy the plastic however

Just get some metal tubing. You can make a bell reducer just by getting two different sizes. One to be threaded to the co2 and the other that’ll fit snug inside the threaded pieces so you can solder it. You’re not limited by the plastic in 3d printing. Your creativity can work passed that

I don't think that's right though is it? Say the canister holds 500psi. If you make a smaller orifice you'd still have 500 psi but pushing on a smaller area, hence less pounds of thrust. It's a tradeoff, more pounds for a short duration, or less pounds for longer. The ideal diameter would depend on the weight of the object and how streamline it is

I was thinking about mounting the cartridge closet to the front to provide ballast and also make room for an expansion chamber as well but the weight variation after emptying it would throw the balance off. Maybe find a sweet spot toward the center but I was definitely thinking a smaller hole and an expansion chamber into a kind of necked down exhaust port kind of like a rocket nozzle as well. This is way too cool.

@@eamonia Maybe a bath bomb warhead to balance it?

The classic method to gas power a torpedo is to use a turbine and propeller assembly so the gas pressure is used more efficiently. I myself would not be able to resist the lure of designing such a thing!

also if you printed a water inlet after the expansion chamber, the gasflow would accelerate it out the back and thus create more thrust.

@@Culpride I concur. A well designed venturi, possibly following or combined into an expansion chamber/heat exchanger, could massively increase the propulsion efficiency, and thus probably the range. Also, relocating the canister would leave the total system lighter, translating into even better acceleration and efficiency.

I read somewhere the first torpedos were launched from shore batteries at the entrance to harbors. The propeller was driven by a coil of wire. The wire was uncoiled back to shore by a steam engine. How crazy is that?

@@iguanapete3809very crazy

The raid on taranto cerca 1940: Am I joke to you?

@@iguanapete3809 actually you’ve got that confused with modern fish. Back in WW2 the torpedo ( bear in mind I’m using the German G-7 series as I understand it’s workings very well) was predominantly mechanical in nature and was descended from the torpedo developed in the late 1890s by Whitehead. To arm it the con would call down range, angle on bow and depth settings. They turned a big wing nut at the front and a little propeller would measure the distance ( minimum arming distance was preset at 300 meters to protect the sun from a misarming fish). The G-7A predated WW1 and like the whitehead torp ran on steam. Upon being shot out via compressed air or sensing the fish hit the water the water would enter through an inlet and something would activate and immediately produce steam to drive the turbine hooked to the propeller. The G-7A had a rather long range but did produce the distinctive white “ bubble” trail which could be seen and avoided. The G-7E introduced later in 1941 was all electric. It had a shorter range owing to batteries and a lower speed but produced no trail. It was best used during daylight or stealth attacks. The G-7E also introduced the magnetic influence detonator which they later added to the A model’s warhead. It worked like a magnetic mine, once close enough to a ships magnetic field the warhead would detonate right under the hull creating a giant void of water and slamming the keel with enough pressure to crack it. It was usually only good on calm nights or harbor raiding where the waves couldn’t bother the depth keeping of the fish. Until the US MK-37 torpedo introduced in the 1960s they used the straight running steam powered MK-16. Even the Whitehead fish that sunk the Blucher in Norway weren’t attached to shore, they were free swimming. Anyways the MK-37 introduced the trailing wire. A multi mile long pair of thin copper wires that connects the weapon to the launching submarine. This allows the sub to control the torpedo and lets the torpedo use the subs own sonar for its attack. The MK-48 of today still uses the wire ( hence the term “ wire break” ) you can disconnect them and a MK-48 is smart enough to find its own way to the target. The MK-48 is also not battery powered either, it runs a small internal combustion engine and runs on “ Otto fuel” this is needed to give it its long duration( over 30 minutes once launched) and it’s high speed ( needed to sink the faster Soviet attack submarines of the Cold War) the MK-37 had speed limitations that could allow a sun to evade it long enough to cause it to self destruct. ( the battery run MK-37 is also suspected of suffering a battery fire which detonated the warhead of one of the torpedos aboard the I’ll fated USS Scorpion )

Torpedo just means naval mine. Most torpedos throughout history have just bee gunpowder barrels

Rifled fins was something that I thought of it.

I don't think that will work, because the instability is always going to be towards the surface of the water, not a deflection due to differing resistance. It'll help it go straighter left/right but not up/down very much.

That might make it go out of control like spinning in circles or curving

No I totally agree putting a twist in the stabilizers will definitely help from purposing

i tried and it made in cuve alot uncontrollably (very random) and slowed it but 2nd attempt gave it a controlled curve but still slowed

Nope

Im with u

Pretty sure the water would slow the spring down

why not make a version that has a some but not to much explosive the shink a paper boat

@@Benneth12 firecrackers?

Thanks and welcome!

Thanks! Im enjoying the ride! I’m having a break from water related projects over winter here, so I don’t have an update on the underwater cam right now. I’m focusing on a fast project on tarmac right now though!

@@electrosync I just got your content randomly through the algorithm last night, so I see good things coming for you!

@@john_barnett ditto

@@electrosync +1 + new subscriber

Ya beat me to it - I was gonna suggest the same thing...

Another thing he could do is to angle the fins more, so the torpedo spins more as it moves, to increase accuracy.

Or a few grammes of TNT ;)

They have the job of producing a stabilizing rotation, which the fins on the tube already do. Might even reduce range due to additional drag

making a much bigger torpedo powered by a regulated paintball tank powering a turbine engine driving the props would be the closest to the real thing as you could get. A regulator would allow for longer run time as well as lowering the pressure so you dont destroy your moving parts.

It's a great place to stop!

Thanks for watching! I always suggest to anyone that stops off at the Holbrook sub to also check out the museum - it's very impressive. There have been so many suggestions to build a better torpedo, so if I make a follow up video, i'd love to collaborate. Thanks for all your time and effort.

would be funny to just re-run the development of the torpedo in the back yard ending with functional acoustic homing torpedoes

Simple and fun!

Pretty sure any such construction would likely blow up from pressure alone. Consider how much pressure on holds. You would need to machine it from metal to have even a chance and use least one of those commercial regulators to limit the flow, witch point it becomes too heavy and cumbersome to work in this scale. Far as i recall torpedoes use pressured air only to push the torpedo out from the launch tube and then electric motor kicks in. Speed of the device builds up cavitation that is used to make it faster, but this also makes it noisier hence everyone in 100km range knows you launched a torpedo and even larger range know if it hit something or self destructed.

I agree, at the the scale such mechanical devices would fail. Buuuut a induction jet could be a delightful thing ;)

I was thinking the same thing, using parts from a dental drill

Sounds cool.

Great idea.

Thanks for watching!

not wrong

I actually strapped an Insta 360 Go 2 to a torpedo, but those shots didn't make it into the video. The drag was too much for it and it didn't do much of anything. Thanks for watching!

@@electrosync Very cool that you tried tho!

it's worth it

I'm sure that you could achieve a more stable trajectory with some serious stabiliser redesign.

torpedoes weren’t just for stuff like this, they had to be accurate to be able to sink ships without any faliure.

Spot on. Ideally, I would have launched them underwater, but the launcher wasn’t powerful enough to get the job done. That’s something that I need to work on for my future plans though. Oh, but also, it was fun ‘shooting’ them into the water!

💀

Uhhh i think thats an adult toy

😂😂😂

Jimmy bill bob I think it’s time for me and your mother tell you

😧

I’m sure it can be done - the efficiency would be the tricky part to get right. Thanks for watching!

Combine that with an expansion chamber so it goes to a gas form and there you go, a true torpedo with full range.

@@electrosync Even an inefficient turbine with some expansion chamber might be more efficient (especially if the exhaust is directed backwards to aid in thrust) than just gas straight out the back. The tricky part would be getting it to be small enough to fit. Probably something simple like a paddle wheel and a prop and then eject the exhaust out the back. if you made the design a tad larger you could fit more but that might defeat the purpose, Just using a small paddle wheel turbine that approximates a pelton wheel might be enough.

Noooo! This project already seems dangerously close to a pipe shot gun!

I don’t know

An underwater launch would also remove the gas/liquid transition that occurs when the nose goes from forcing gas(air) out of the way evenly across its entire face, to liquid hitting the bottom of the nose asymmetrically and setting up a harmonic wiggle.

I was thinking that too. I couldn't figure why he only launched them in the air at an angle into the water.

www.thingiverse.com/thing:409394

@@electrosync THANK YOU

@@Slushee also it ain't smoke its cold co2

@@Slushee cause its gas its gas bruh gas bubble it can cause the bubble is protecting the gas

No, me too…

Thinking what?

About your mom