I 3D printed a CO2 Rocket 

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My idea for next vid: make a sugar rocket using a Tesla Check Valve. I'm curious to see what kind of boost it would have if any.

"Psssssssssssssssssssssst.......Nothing happened" Rocket man, glad you got it beyond that point haha.

You should design a nozzle for a garden hose. I would love to see that spiral aerospike shooting out water (or fire).

How did I miss this vid

Video idea! Use the CO2 rocket to launch pellets (or bbs) to make a tomato killer! Edit: tomatoes are disgusting!

I wonder who's workshop is full of more empty Co2 cartridges

Video idea: For more sustainable testing, make a nozzle testing rig using steam instead of CO2! Then you don't need to buy all those cartriges for static testing - only for freely moving stuff.

Video Idea: try to make a combustion engine using a 3d printer

Make it a goal to send a tomato high into the sky with your own rocket! 🚀

Idea: Make some thing out of Empty cartridges because they can withstand high pressure and you have lots of them😂

That "thank you" in polish was really heartwarming since the country is often forgotten I happen to be from that country

This video gave me the idea to see if you could come up with a gas thruster engine for landing. Having a object fall and seeing if you could get a soft landing.

Suggestion: Make an RC car with the powertrain driven by your fan jet engine! Like the M1 Abrams tank. This will be state of art!!!

Make a rocket powered door 🚀🚀(that opens with rockets )🚀

Awesomeness! Loving your work.

To help the rocket nozzle withstand the heat you could use the fuel to help cool the nozzle or some other liquid to keep the engine cool

Nope, no dry ice in there. The pressure in cartrigdes like that is about 55 bars, at that pressure CO2 is liquid (at room temperature). When releasing the pressure, you do get some dry ice out of it. That happens because of the enthalpy of the system, which is conserved. If the cartridge opening is small enough that is (Joule-Thomson-effect). You can see in the p-H diagram of CO2 that when coming from a liquid at 55 bar, dropping the pressure you end up with a solid-vapour mix at ambient pressure, due to the temperature drop. I use the exact same method to make dry ice pellets for the Leidenfrost experiments I do for my master thesis.

Would it be worth exploring con-di nozzles? I imagine the pressure those cartridges generate is more than enough to get supersonic flow so you'd probably be able to design an extremely efficient one

@Integza I watch your videos 10 times a day 😭❤️❤️

A self landing rocket would be a great multi part special. The ability for a gimbal style nozzle that is also proficient in a vertical take off and landing with out the need of exterior fins.

Integza, look at the results you have obtained. 6mm expansion cup down to 3mm expansion cup made a massive difference. That aero spike nozzle appears to release more volume than the 6mm expansion cup. Reduce the size of the aero spike and it will work dramatically better

Have you studied the converging diverging nozzle? I know there’s ways to calculate the right nozzle size but for sea level the recommended shape is extremely simple. 35° convergence, some length for the throat, 15° Divergence. All you need is the length of the convergence and divergence and radius and you can get an easy and efficient nozzle. Also something else to add, if you want to get high temperature resistance I recommend graphite rods and a lathe to mill them into shape, they are fairly cheap for decent size nozzle and are used in actual rockets for their insane heat tolerance, also you could use some motor cooling like cold gas going around the nozzle before being combusted and exhausted out the nozzle creating a nice system. Anyway, good luck with your endeavors and I hope you read this!

That was extremely interesting, great video. I must admit that was one of the cleanest 'dziękuję' I've heard from foreigner. Dziękuję i pozdrawiam z Polski! (Thanks and cheers from Poland!)

I’ve enjoyed your videos so much! Using, where practical, 3D printing to explore science and engineering in a way that helps appreciate the amount of thought that goes in to successful design.

Great video Joel! Love to see your progress throughout iterations 😎

What about if you make an actual rocket? Not just an engine, but a whole rocket that utililises something like a sugar based fuel, or if you want to go the cool route, use a nitrate fuel. They are combustable as hell and they are relatively easy to make. Just make some methyl nitrate by adding some nitric acid, sulfuric acid and methanol. Be careful tho, it's pretty dangerous if you do it too fast.

cone nozzles found on rockets are that shape because they hold the high pressure of the propellant longer. The downside of having a large cone is that it starts to have significant aerodynamic drag at higher speeds and that they start to weigh too much. But in outerspace, the larger the cone, the more effective the rocket propellant mostly due to not having air molecules to push aside and weight isn't really much of a factor. Issue is still getting such a large cone up into space in the first place.

Build a lander for that multi stage rocket so you can send something up that can land using, parachutes, gyros and CO2 rockets for impact braking 😊. Kinda like a moon lander of some sorts.

VIDEO IDEA: Since you have a lot of empty Co2 cartridges why don't you use as a tank for solid rocket fuel (for example the sugar one). With cartridges you can get a nozzle simply by going to countersink the hole. The divergent part will be missing, you could perhaps weld, on the outlet of the cartridge, a bolt or any suitable piece of metal and then countersink for make the divergent part of the nozzle.

Video Idea: I'd like to see a combination of CO2, nozzles & water. Suggest you don't pressurize a tank of water but instead add smaller amounts of water into the CO2 flow path.

I bet some kind of spiral nozzle could have stabilized those rocket bullets you were making in your other video and maybe with something behind it, like with that actual rocket nozzle, where it lets the gases expand out of the back with a little bit of material to continue directing them backwards.

You should try making a liquid fuel dry ice mixture hybrid motor using dry ice and water to power it, a completely clean and mostly safe alternative for people to try at home

You should try wrapping some heater wire stuff around a CO2 cartridge that gets really hot right before the valve opens to add more pressure

This is probably one of the best representations of why bell-shaped nozzles are used so often on rockets!

You may want to install a pointer that lines up with your ruler to help eliminate parallax from the camera.

integza you can use those co2 cartridges along with small servos to create a guided rocket because what's better than a normal rocket guided one ofc

If you have a CNC machine, I would suggest trying to machine graphite for the next rocket nozzle.

This one is a little out there, but... Video idea: I'd like to see you build a rocket powered trebuchet, catapult, or bolt launcher... Basically any overly engineered rocket powered siege machine. 😁

Not sure how I wasnt already subscribed as I've watched a ton og your videos

That johnny bravo joke had me rolling, thanks for that!

Would love to see these tested with a load cell or some other kind of force guage to get an idea of how much thrust they're producing! Tom Stanton has created a few simple rigs for testing his air piston engines! It would also be cool to see how a water rocket using those cartridges would perform!

That aerospike nozzle was amazingly beautiful to watch. Video idea: make an updated version of this but it uses multiple cartridges at once.

Maybe try adding a heating coil between the CO2 cartridge and the Nozzle This will cause the gas to expand and increase the thrust produced ( heating coil can just be a copper coil connected to a battery)

You should see if you can turn a bottle of soda into a rocket, using the carbonation and some nozzles. And theres tons of bottle shapes so I think it could be really intriguing!!!!

Now that you have a reliable way of testing nozzles you should put it up to us to try and design a nozzle that could perform better. A competition among the viewers!

You need your thrust to weight ratio: Thrust / Weight * 9.81 needs to be higher than 1.2 to get a good push against gravity. The closer to 1 you are, the more fuel you waste going no where, and if you're under 1, you are literally throwing fuel away.

When these cylinders are used on lifejackets they are deliberately oriented with the outlet at the lowest point. The reason for this is so the liquid CO2 is pushed out by the gaseous CO2. Not having it oriented like this the outlet of the cylinder can freeze and massively slow down the emptying of the cylinder. For this reason large CO2 cylinders that are used on liferafts have a flexible siphon tube to make sure that the liquid comes out first. Might be worth doing a back to back comparison. Also the operating head off a co2 lifejacket could be an elegant way to activate the cylinder with a bit less weight

Random Guy: What kind of rockets do you like? Integza: Yes

Would love to see a mocked up rocket launched (safely) outside using the 3mm nozzle, maybe in a field or other open space... A real test for rockets that have a low probability of exploring...

Connect the catridge longitudinal to the flow rather than at perpendicular to the flow. Since,Cg changes to the side of catridge, it produces torque instead of thrust force to lift it.

Can you try use those party sparklers as a fuel, they are readily available and let off a lot of energy when grouped together, coupled with a combustion chamber an a nozzle at the very least some sparks will fly and it will look pretty cool

It's not a solid, it is a liquid inside the canister.

I love all the rocketry within his videos. It has inspired me to bring some of it into my classroom. I also really like the idea at the end of the video of the 2 stage rocket, could you do one that is built from 2 different propellant's? Like using the Devils toothpaste to start it and then to carry it a little further the CO2 cartridge idea?

Idea! Mix It! Use that gas to make a cooling external spiral around a hot nozzle, It will help to cool it. On the other hand, the finish of that spiral tube can also used to push the rocket too if you use It to compress more the fire at the end of the nozzle.

If you can get C02 tank for paintball and a remote line, that could speed up your testing process and reduce the number of tanks you must go though testing nozzles, as you could refill the tanks.

Video idea: Build co2 torpedoes using different nozzles and test them in a pool to show their performance difference.

*idea: liquid cool your engines like the real ones so they dont burn up!*

Idea for the next video: Ok, this isn’t relating to the CO2 part of this video, but taking the nozzle idea to a slightly different application. You know how in summer when it’s super hot and a pedestal fan you have is just not doing the trick? Well what if you can use one of the explores nozzle geometries from this video, but scaled up to fit onto a small pedestal fan. Then you can use the same fan to cool you down, but experiment to find the ideal ‘nozzle’ fitted to it to see if they make a difference to how efficiently/ well you can be cooled down. Seems like a fun build, but also a chance to see some larger scale 3D prints… 👍 Keep up the crazy cool vids though. Forza Integza!

After cleaning the part with your parts cleaner, Soak the print in warm/hot water for 10 minutes before pulling off the supports, then dry and cure. It is what we do with figurines. The supports pull off cleanly without dimples or special tools.

Use a raspberry pi to control flow and testing in your rockets. You could have temperature sensors, and force sensors to get more data out of your tests so you can find what works and doesn't work

This is a challenge: make a performing rocket fuel based on those evil tomatoes

Congratulations amigo... Keep it up... 👍

Maybe try building a rocket with multiple types of propulsion, either though multiple stages or maybe even just multiple nozzles all firing at once. It probably wouldn’t be effective, but it would definitely look cool and it would be interesting to see which nozzle pushed the rocket more when compared to the others.

"It's ice, isn't that cool?" I see what you did there...

Cool video, thanks for that! 0:50 the CO2, when compressed at RT, is in liquid form while when decompressed it freezes down to -77 C becoming dry ice. I believe if you try to keep the metal cylinder and the gas from freezing you should get more power out of the shell.

Hey man make music or sounds with ionized particles it's awesome I saw someone do it before it was cool asf

Video idea! Make another channel where you post videos of how you come up with ideas for the video, how you setup and film the video, and what it takes to edit them. Shorts for that channel could be deleted scenes, and print / build failures.

Video idea: A drone with a rocket engine built in! Or even design a custom drone with a rocket booster included. A drone that can hover, then instantly activate warp speed would be awesome!

I vote you make a dedicated test stand that helps you take data.

multi-thruster combination engine. Seems like fun!

I think you should combine this project with your previous metal nozzle experiments. Go back to the previous (combustion) rocket setup, only this time, when you design the metal nozzle, build channels into it for the CO2 cartridge to discharge through. The combustion rockets kept failing because they would melt the nozzles. I'm thinking that by running the super-cold CO2 through channels designed into a new combustion chamber/nozzle assembly, you could keep things from melting down. Most of the thrust would likely come from the combustion portion of the rocket but it will hopefully last long enough to do some useful testing with.

Here is a video idea: Make an Ion Thruster! I really want to see you explore super cool phenomenon.

Video idea: build a rocket made out of dry ice and test it. Tomatoes are disgusting.

This reminds me of some of those old pressure-fed RCS systems used in Gemini and Mercury

Video idea, thrust stand with a scale or deflection beams for measuring the amount of thrust that your creations make.

Idea: Add some kind of cooling system to your hotter rockets to prevent them from melting

Video idea: build a shock tube. This is the same thing Smarter-Every-Day built to launch a baseball above the speed of sound. With 3D printed parts, it would be a challenge to reach significant high speed flow, but it would give you the opportunity to test nozzle without large temperature fluctuations. AND you could launch a tomato.

You can use decomposing tomatoes to make biogas, and store it up some where and redirect it through a tiny nozzle attached to a combustion chamber and make thrust out of it. 50kg of rotten tomatoes are enough.

Hey Integza! How about building a De Leval Nozzle with spiral flow in-built? And you can use it in your multi-stage rocket build! You can use a hybrid setup with both liquid and solid fule. This way the first stage can be solid fule and the second stage you can use the De Leval Nozzle with the spiral air flow in second stage. And if you mount it on a gimbal like setup, you'll also be able to control any deviation in the direction due to air resistance.

make a multistage rocket where the stages can individually land vertically or just a single stage that can land vertically (space X style) Or a silo launched rocket

VIDEO IDEA: make a nozzle that is similar to an Air Break of jet planes so that the exhaust goes backwards and maybe place the valve externally so the weight is lower.

video/series idea it is where you get viewers to submit designs for rocket Engines then test and rank them like Major Hardware did with fans

Remove the solenoid valve and make a mechanical solenoid piercing pin to discharge all the gas (solenoid should be outside the rocket structure). You will reduce the weight of the rocket. And you will achieve the right linear structure of the rocket engine. 😉 love your videos.

Hey Integza, I have an idea for the a rocket launching system, what about using a jet engine attached to the bae to propel the rocket and then using the rocket's engine to fly higher? You can probably shave some weight of the rocket with that.

You should build a rocket thrust measurement device that gives the value in Newton and maybe compares all of the rocket engines that you had bulild so far.

Applied science has this pressure chamber that you put dry ice into and let the co2 go super critical I know it would be really hard but one of those with a nozzle on it the pressure is ridiculous and it's heavy but on a linear rail just to see if you could make a rocket from the co2 the dry ice creates

How about a G force sim build using your nozzles and rockets in a small scale format? On a horizontal plane. This will both test different nozzles to see what will be best suited as well as also visually test how the rocket will act at speed versus gravity on a horizontal plane.

I think a RCS array would be awesome, these are usually used to finely maneuver spacecraft in orbit. They have funky nozzle designes so we t would be interesting I think?

What if you made rocket parts with direct metal 3D printing or with a metal-based resin? It would be interesting to see if you could make a version 2 of your 3D printed pulse jet.

Ciao Integza è quasi più di un'anno che guardo i tuoi video e devo dire che mi piacciono molto, il tuo modo di testare i vari processi di un progetto è veramente sbalorditivo bravo...a questo punto mi chiedo perché non creare un razzo da testare a campo libero all'aperto per vedere che altitudine e spinta di lancio si riesce a raggiungere. potresti creare diversi composti di combustione già testati nei tuoi precedenti video o provarne di nuovi. spero di averti stimolato e dato nuove idee per i tuoi video...continua cosi che il tuo stile piace :D

Video idea: try conducting an experiment that determine what would be the best propellant style or fuel.

5:00 for the next tester I would advice to use a pulley system so that you can put some weight on the tester and equalize the pull of gravity, you could also use different weights to have a easier time reading the power of your rocket

Idea: Make water rockets easy to make and they can go pretty high .

Discharge the air into a container of water (with nozzle). Gives more resistance for the air to push against. Nice going though.

compare various diy propellants and analyze the efficiency of chemical combustion vs pressure storage etc.

Video Idea: You can Check Out Hydro foils ^^ (under water wings) for litterly flying Boats With high efficiency

I would love to see a video where you attempt to make an ion propulsion engine or build off the turbojet engine project you did and attempt to build a high bypass turbofan engine like thise currently used on commercial jets as I believe it would be very popular and informative to explain how compared to a turbojet engine, a turbofan engine produces up to 85% of its power from the bypass stage. I know that in earth's atmosphere it will not be very dramatic as it relies on low friction and long periods of time to accelerate but I think it would be a great concept to demonstrate to viewers. I would also really appreciate the 3D printer as I am a pilot by trade but I have a degree in chemical engineering and love to design and test different things. I used to have access to one while I was in school earning my degree but since I graduated I no longer have access to a 3D printer. I promise to out it to good use and am also interested in possibly collaborating with you on a video that involves anything aerospace.

It might be a good idea to rig a scale or something to try and measure the thrust during rocket tests

You can build a rocket that uses CO2 from a cartridge to cool down the nozzle, but also generates thrust and that also has combustion. This way, the nozzles will not melt (at least not so quick)