I built a PULSED ROCKET ENGINE 

Video idea: create a launchpad for 3d printed rockets and measure how high they will fly using different rocket nozzle designs+ And: Tomatoes are disgusting🍅🍅🤢

Never mind, don't ball mill ammonium perchlorate. Forgot how bad an idea that is. K nitrate will work much better if milled though.

Video idea: Mostly for visuals, use an old school kitchen scale with an analog interface. You could see the movement in real time. Most have a clock like interface.

Wow, your explanation of how a de Laval nozzle works was simple and effective. The visual aid was very helpful.

Video idea: make a rocket test stand that properly measures the thrust it produces! Beats a kitchen scale and it would be a fun project to watch. Tomatoes are disgusting!

Video Idea: 3D print some rocket powered toy cars and race them against each other (as a way of measuring the thrust of the rockets)

Integza, you could try spiraling the fuel grain instead of having it be a straight bore, that might help it burn less chaotically. I'm wondering if you could 3d print a multi-tool, it would be interesting to see what kind of an edge you could put on a ceramic 3d printed blade.

Cannot believe I'm finding this channel just now, this is by far my favorite engineering channel now.

after you've nitrated the cotton, dissolve it in a solvent and reconstitute it. The surface area will be lower, so the burn rate will be more manageable.

The progress on the rocket engines is increasing exponentially and always entertaining 👏😎 Looking forward to the next one! 😉

for the pulsing rocket I think you were achieving too high of a pressure, thus it spiked, turned into a detonation, pressure dropped and it repeated

You are a very inspiring person. I love how you never fail and only have learning opportunities to do something better which after watching you for some time, you are only getting better and better. Keep up the great work.

Testing until it explodes? - This gets a thumbs up from me!

Video Idea: Try to make APCP as a printable propeller, this would create much much higher thrust. Then insert the printed rocket motor in a 3d printed shuttle model like this you could create a semi accurate test flight of a miniature shuttle.

7:11 "This is a grotesque oversimplification." Thank you for saying this. 😂

your video editing and presentation has become a lot more polished and professional !

5:15 It's my understanding that the gas heats up in the chocking point, it can't gain speed so the energy goes into heating up the gas, when you expand the nozzle the gas is able to expand and the speed increses. ScottManly explains this very well on his Hypersonic wind tunnel video, go check his channel, I think you may like it

Hey Integza, I make rockets every year (Guy Fawkes) in the same way commercial ones are made. The sugar KNO3 works fine (a small addition of sulphur helps) in a card tube. The grain is also the combustion chamber. I use builder's plaster filler to make the nozzle by laying it over a former. A tube shaped whole works well. I use a metal rod as a former. Those oscillations in your burn were caused by two things, 1) the shape could be slightly inconsistent and 2) Up to a certain limit the rate of burn is proportional to the pressure in the chamber. So everything gets exaggerated. The boosters for the shuttle are much the same. They use rubber and aluminium powder as the fuel with perchlorate as the oxidiser. The core is a simple tube. P.S. Have you heard the story about the boosters and the size of a roman horse's butt? let me know...

I love your videos so much and Fantastic work on your projects

Great video again!!! Good job, dude😍😍😍

Very cool. From what I've researched, I think in general it's just going to be a problem until you can find out the perfect mix of oxidizers and fuels that can be printed because I know that they typically moderate ammonium perchlorate with other chemicals to control the Burn Speed and I'm sure that NASA has multiple documents on it they use a couple different kinds of plasticizers that also have moderation capability

Attach tomatoes to a big helium ballon and send them to space and the explode it there

Killing it . Nice work.

That is crazy stuff ! Keep it up.

Add aluminum powder to the mix. That should improve the performance. Perchlorate, aluminum and rubber is a solid rocket fuel. So you would have perchlorate aluminum and resin should perform decently if you can get it to print.

Video Idea - Since all of us love rockets and some of us have 3D printers, your followers should try designing rocket nozzles (and try them out if they dare) and submit them to you somehow to see which rocket nozzle performed the best! Heck maybe a tomato shaped rocket nozzle would be the winner 😉

I would love to see theses attached to model airplanes, boats, or cars to see how fast and far it could go! And of course a model rocket would be awesome to see how far up it could go

I would love to see a video testing different rocket fuels and the amount of force they produce.

Try stacking a bunch of these together to make an auto detatching multistage rocket. As the fuel burns up it lights a second stage which burns/detaches the previous stage

Integza, thanks for using my battleship nozzle idea, and the cause of the pulsing and under performance of the engine is because the engine is getting chocked, either by inefficient burning causing residue to block the nozzle ( which may be fixed by having the nozzle side down ) or by the nozzle being over constricted ( which I believe is what caused the sputtering )

Dude! I love you, man. Cheers. Thank you.

You are making impressive progress.

I haven't finished yet, but I saw you were using a sparkler to ignite it, for cored rocket engines to work good, they need to be ignited at the end of the core farthest from the nozzle

It looked like the bottom cap of the rockets were melting while being tested, resulting in deformation as it went. That might be introducing some inaccuracies in your force measurements.

Video idea: A comparison/explanation of store-bought rockets and 3d printed rockets and the difference in power, chemical makeup, etc

A drone with rockets to get high speed! some person did something similar with a extra motor and a FPV drone. just add a rocket, everything is better with rockets!

NASA would like you to stop lurking around their website Joel. They already have been one upped by SpaceX, and an IntegzaX would break the cat. Sick video brother!

Hi Integza, Thanks for another great video. I feel something needs to be done with all this thrust, maybe try your best thrust engines on some rokets and test which one comes the furthest or highest!

Nikola would be proud! Keep at it! I'd love to see a 3D printed gyroscope, there are so many applications!

Love these...maybe you should do something interesting with a vacuum cannon

Video Idea: it'd be cool if you used a raspberry pi/Arduino to make a code-able and remote ignition system. Be cool if you used step-up transformers and just send a plasma channel level arc through the combustion chamber to set the fuel. Also again, code-able. And if you when back to using propane and O2, you could have a pulse jet engine by simply setting an interval. All this could be down through Raspberry pis gpio and running it on something like MU (Python) or Node.js (JavaScript).

2 ideas to try; First, I think you'll get more power if you add some sugar into this rocket-resin. Resin is a long chain molecule with its set, so it will burn slower than something like sugar. This will help you get a faster, hotter burn, without compromising the printing of the resin much. And it wouldn't take much sugar (by %) to get a good amount of improvement. Second, since your machining skills have improved, try a revisit of the Tesla Turbine! Maybe power it with some rocket resin, and see that baby go nuts!

Im so proud of you, youre getting so good at this 🤣. Dude ive loved all these rocket videos youre making

How about a little foray into aerospike engines? ... and of course... Happy New Year!

An important part of rocketry you tracking the telemetry and performance of the rocket in-flight. A video stress testing potential sensors / data loggers could be interesting, and perhaps you could make a custom PCB via your sponsor to integrate them?

Thanks for the awesome videos.I watch TKOR and it was to see that you’re working together with rockets and I’d love to see more rocket videos!

Thanks for uploading. I had the chance to see a rocket launch in 2018. Unbelievable experience. I shared a pretty cool montage of the trip to my page.

I love your videos!

Suggestion: Go get some gunpowder that is "smokeless powder" (smokeless powder is nitrocellulose). Dissolve the smokeless powder in acetone. Be sure to stir it thoroughly for good consistency. The result you will have is a gooey fluid to paste onto things, or pour into things. If you need it to be thinner, add more acetone; if you need it to be thicker allow the acetone to evaporate out of it. Once it is on, or in, whatever your using it for, allow it to dry THOROUGHLY for all the acetone to have evaporated out of it. The end result will be a hardened pyrotechnic coating or filling. I'm not sure how well it will work if you mix it with resin, but that's up to you to find out. And I am with you, tomatoes are disgusting. Have fun!

I've enjoyed watching your process and admire how you have been trying so many different ideas to 3D print rocket parts! For a future video, I think it would be awesome if you 3D printed a piston engine like your steam engine, but powered by some sort of combustible fuel!

Thanks integza, I am now on a watchlist

great video i love it

Video idea: well, more of a project idea I suppose. I really like this idea of 3d printing propellant grains, this could seriously be a game changer for solids/hybrids since you can print some really interesting grain geometries. Maybe you could make a video on making a data acquisition system that measures your rocket motor chamber pressure and thrust. Then, you could do another video on designing a rocket motor test bed that is reusable and can withstand multiple firings. Then finish it off with a test series and comparison of different propellant grain geometries and fuels. Then bonus video: build a high powered rocket and launch it with your best 3d printed fuel. P.s. if you want any advice on building rocket motors/engines feel free to reach out to me. I'm a rocket propulsion engineer by profession and would love to collaborate with you. Keep up the great work!

video Idea: catapult-based space launchers that fire cargo off a track, nasa researched that some years ago and there was a startup called SpinLaunch trying it

Yep, I am definitely on a watchlist somewhere after seeing this video.

Have a metal shop fabricate a really thick piece of metal clips that way you can or stand much more higher pleasures and also get different nozzles types mount

It would be awesome to see you build a small Reaction Control System to use on a model rocket!

You should put the 3D printed rocket fuel into a aluminum casing to hold the pressure so that it can build thrust just like they use in model rockets 🚀

Excellent video. My suggestion for an upcoming video: Build a 3D printed flying person with rockets attached to his/her backpack. Optionally: add a remote control.

You have the possibility to 3D print, which means other shapes for the solid propellant : the star shape is nice if you need to just extrude stuff. Here you should try shapes with holes/fractales embedded.

Make a electric skate board and also attach two small rockets for a short boost

Video idea: I would like to see one of your engines on a plane or something similar! I love flying vehicles!

I love your vids and after watching this, I was thinking, is it possible to create a triple throat but one fuel chamber or three chambers, one throat? How inconsistent would it be? Also when you add the actual rocket to the motor in this video, how much faster would the thrust fade with the added weight?

remote rocket detonator (3d printed) should be cool. there is so many ways to make it from rf relay to phone and with some cool 3d printed case should look nice.

Future Video idea: You could build some kind of water cooling system to cool the overheating nozzle.

I think you can actually make rocket fuel with nitrocelulose, but you might need a bulkier chamber, would love to see that as a video

pls can you make a room tore because i would like to see what is all around and how it is set up

you crazy s.o.b. please never stop making videos

Idea: print a punch of rockets with parachutes mechanism and find a wide-open land so you can lunch and test all sort of rocket fuel you have made.

Try replacing iron oxide with magnesium powder... I used by the past 50% Potassium chlorate and 50% magnesium power... It is a fast as your cellulose

You should make a video showing different oxidasers

Try getting a small tether car strapping that rock onto it and watch it go in circles that would be really cool. love the vids good educational and scientific facts thanks

Video idea: layer the fuel in this way: faster burning = inner layer, slower&longer burn = outer layer. Nitrocellulose should be the inner layer, maybe phosphorus as the second layer, and keep layering until you get to rocket sugar or something more slow burning. That should make the rocket burn fast, and when it's turn for the outer fuel layers the temperature inside the rocket chamber should be big enough to burn it fast enough to work well as a rocket. If faster burning fuel were to be in the outer layers, the rocket would explode because the pressure generated would be too great for the chamber. (So the idea is to keep constant pressure with the increasing temperature by picking slower burning fuels as time goes on).

You're making rather nice advancements with rockets! Since rockets occasionally touch on fluid dynamics, have you ever looked at supercavitation?

Integza! You can make an audio speaker and crush some tomatoes by powerful bass! Also try running pulsejet engine powered by resin.

CAN ANYONE PLEASE JUST GIVE THIS MAN A METAL 3D PRINTER O:

I would like to see something cool be made with conductive filament in a future video !

Hey, Integza you should try to make a fine powder of nitrocellulose and mix it along with the oxidizer and resin to get a good fuel that can have a high burn rate

The shuttle engines used powered Aluminum as the primary fuel, the binder was just there to hold things together while burning. Ammonium percolate and Aluminum Give it a try! Also Iron Oxide and Aluminum can be loads of fun. I tried to cast a part with Iron Oxide and Aluminum but too much slag fell to the bottom of the mold. Still fun to do though.

I would like to see you revamp the idea of the ceramic printed nozzle. You already had it working, just add some glazing to make it more impervious.

I wish I could create these high-quality rockets. I remember once when one of Integza's videos gave me the inspiration to make a rocket which burnt my leg and nearly, my house.

as soon as I see the notification u uploaded I click it to watch 😂

Video idea: I think a Fractal Vise would be really cool to see and would be useful for future projects!!

I saw a number of good ideas and liked my favorite, but I have to add my own. Since you exhibited inconsistent burn I think a coating on the inside of the core that would facilitate a better ignition might allow you to develop a good rocket. Tapering the core might be useful too.

Video Idea: Add a nozzle to an Estes rocket and compare it against a stock version to see how much of an effect a nozzle has practically

*Integza* , since you have a problem with your engines melting down, use liquid nitrogen as fuel in a rocket engine :D (idea)

Idea for some of your older projects? Husky high performance blow gun with ultimate flow tip. Look this up. That tip can nearly double the output when air is blown through it. Maybe it can be used on some of you're previous projects to increase thrust. The higher the output, the stronger the thrust.

You should try printing your fuel resin with structure to see if you can get a better burn. Might be an interesting video.

10:46 I wish I could help! I actually think maybe a metal casing instead of acrylic would be a great idea, maybe a CO2 cartridge with the nozzle end cut off? Though you’d probably want to make another peace that would be rounded at the top to have good engineering design.

Hmm... possible future video idea, I wonder how well it'd work to use a Filastruder or similar to make your own oxidizer-filled filament, and FDM print some solid fuel rockets. You'd have to be really careful with it since you'd be processing a self-oxidizing fuel with heat, but you should be able to do it well below the autoignition temperature.

Hi Integza, I think for your next video, you should make and launch a rockoon and shot for space. The project would use the rocket components you have been testing, a weather balloon and a small payload maybe a tomato, if you want to put one in orbit or a small satellite. i am not sure on the numbers, if it would make it in to low earth orbit or not but the weather ball would cut the distance the rocket has to travel to achieve it massively. this would also give you a project that uses the 3d printers for structure of the rocket, cradle and a small amount of electronics, Arduinos, raspberry pi. this would be good for igniter, gps, and other parts of the projects. this would also give you a chance to use Altium designer for a custom pcb for the controls of the rockoon. hope you enjoy the idea. looking forward to the next video.

I saw that rocket facing up on the scale and immediately had a flashback to the attic ceiling on fire 😂 With these solid rockets, I think doing a R.A.T. aircraft would be amazing for a future video! Maybe even include some fpv on it from project air and make it long range!

My idea is to make a 2 stage rocket using fuel from that vid, it would be great if it will fly.

Video idea: 3D printed 2 stage rocket tested with different types of fuel. Like gun power , sugar rockets , or even some sort of liquid fuel. And for the test try and get a speed test on them or how high they can go.

Very nice. I've been gone for a bit working on my new channel. Catching up on what I've missed.

I think you should keep on going with this project I think you should make an all still frame with a break away of plastic for safety

Vídeo idea: You should use tomatoes to make filaments and build a rocket with it!

My idea - make rocket povered rc boat, but stearing has to be rocket povered too... I think that will be a challenge for you... And i want a 3D printer🙈

Hmm using a few small pieces of the flash cotton, in between or mixed in to the rocket fuel paste could be interesting for a stronger but not too crazy thrust force. That said if you ever want to do a two stage rocket when you're ready, you already know how to set up say explosive bolts or an ejection system which could be self controlled by the central fire.

Integza: *fancy math equations* Also Integza: "Grotesque oversimplification"