NASA lost this TECHNOLOGY 60 YEARS AGO

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The work at TUB has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 956803. Website: inspire.cerfac...
Solenoid Valve:amzn.to/3YrrwJJ
3D Models :
3D Printer I used:www.elegoo.com...
Resin I used:siraya.tech/pr...
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Discord: / discord
Reddit: / integza
#engine #rocket #3dprinted

[@smartereveryday]

You need to visit Huntsville

[@integza]

Do they have one of these babies there ?

[@rogerrinkavage]

@@integza i think Dustin's there...

[@Collinoeight]

Living there was the best time of my life

[@josphe9011]

Just moved there :p

[@titanbot11]

@@rogerrinkavage Is Dustin a RDE?

[@integza]

I big thank you to Dr. Myles, Dr. Eric Bach and Dr. Quentin Michalski for the help they provided!

[@JokerJonny]

Never thought that you go to Berlin for Rocket engine research... how was my home country?

[@marz.6102]

Why don't you make a future video on ways to make stronger resins and filaments or materials for your 3d printers for your future projects for example using graphene for the resins, Will it work? I don't know But you will get the ball rolling.

[@specknik356]

Can you share the Japanese Paper? Its really fascinating. The link in the description seems to only provide the Model. Really great Video!

[@majick13]

Thanks for including the lab built rocket and the individuals that built it, I love to watch your videos and it's really cool to see how there are people in academia doing research on the same thing you are 3d printing! Would using something made by the Explosions and Fire channel help ignite the RDE? It might be worth it to reach out to him and see what types he'd recommend.

[@pubz2288]

Discord link isn't working, can you send a new one?

[@PlasmaChannel]

Just when I thought there were only so many types of rocket engines, my mind gets obliterated....tomato level obliterated. Phenomenal Joel!

[@integza]

Nothing like the smell of burnt tomato in the morning !

[@RainaPCB]

@@integza does it taste good?

[@TyMoore95503]

@@RainaPCB Mmm...saucy!

[@flattirefire]

@@RainaPCB no, tomatoes are disgusting

[@_blood_moon_proto_1500]

i think there is over a 1000 types of rocket engine as is, not even counting ones lost to history which last i checked is estimated to be in the hundreds, oh and integza the shotgun shell ignition is actually a technique that started with British tractors then a few planes, loud but fun....makes me wonder if a vacuum based rocket is feasible, you know, one that pull's air from the environment like a jet engine

[@SgtSteel1]

How that tiny engine made that metal rod glow and bend is insane. Imagine this little engine being 100x the size.

[@idiot528]

Sir the earth has become a donut

[@LeftInStone]

And like 27 of them or more

[@larnregis]

And running continuously for several minutes/hours.

[@JoelCreates]

My favorite engine you've done so far!

[@integza]

Mine too !!!

[@strawberryspike8538]

I agree

[@milaanpatel4997]

Not many researchers are working on it. A road less traveled is most adventurous. This is something I am looking to pursue.

[@gmourao]

Uncoolable but fun

[@aiiaround1007]

Yes I know

[@rebelg]

After following Integza for a while, I think the real question is: when is he flying to the Mars using his 3d-printed engine?

[@TheSimonarne]

my prediction is he will have a 3d printed rocket flying to space in 12 years. so its bound to happen eventually

[@CyberKalle]

True lol

[@viktorf1861]

I wrote the same thing with the Moon and then I saw your comment.

[@camplays487]

He’s gotta take a golf club with him so he can swing at a tomato under Martian gravity😅

[@TheSimonarne]

@@camplays487 what!?

[@andren2747]

Suggestion: Journey to an actual standalone rocket/plane/car - I really enjoy your content but working towards a practical, containerised engine for moving vehicles would propel you to anti-tomato legend status! I know it would be a much longer project, especially getting pressurised fuel into a reliable lightweight stand-alone format, but maybe collaborating with more like-minded people from e. g. the RC sector could make it a lot easier - In any case I look forward to seeing what comes next!

[@cry9740]

Yeah!

[@mikhail010]

Hell yeah

[@ryanrich9186]

I had the same thought, but on a slightly larger scale.... I've seen people build rc aircraft that are friggin HUGE.... why couldn't one be made to carry a payload of say 200 pounds? 250 pounds? And if this can be done, would it be possible to use an engine like this since the tanks are relatively small... I have been designing a " personal aircraft " for many years, without the needed knowledge to be successful, but using my gi bill I am currently going through on an aerospace engineering degree.... I am hoping to tinker my way to a fun and REALLY dangerous toy some time in the next decade.

[@AirNeat]

Peter Streipol please help us!!

[@loganhenning4850]

@@ryanrich9186 what's your email? I think I could help you out a bit here... just finished my first test flight building one out of my garage (theoretical 500 lb thrust)

[@bradheath4200]

I admire your curiosity, intelligence and drive to do something simply for the sake of learning from it young man. Good luck and safe travels my friend.

[@arefabdala644]

I’m a researcher at the University of Central Florida specialized in RDE’s and Pressure Gained Devices. I have been watching your videos for a while and would love to talk more if you are interested. My next video idea would be to make the RDE combustion chamber annual and attempt to observe the actual rotating detonation. An additional idea would be to create a planar RDE which would use this exact same set up and would just be used to observe the detonation wave.

[@KayleeVRC]

Upvote this please ⬆

[@seemlesslies]

My issue with this type of engine is that they are INSANELY AND EXTREMELY UNSTABLE. While I know hopefully in the future we might be able to implement these types of engines there is a reason why haven't seen that happen. I did see P&W got a contract for them, but it will be interesting to see if anything comes of the research. I remember during my capstone someone gave a presentation of these and I highly rolled my eyes at them. As an AE we already have enough problems with airplanes trying to blow themselves up.

[@bingwrite]

@@seemlesslies As an A&P I can confirm, turbines like to blow themselves up haha. It would be interesting to see an RDE used in a sort of “afterburner” theory behind a turbojet. If it was centered on the inner axis and the compressor section could direct compressed HydrOx fuel air mix you *could* potentially have enough pressure to drive the combustion wave. I guess you could think of it like a shotgun, inside a cannon hahaha

[@akshaygode4993]

Buddy am interested to listen to your talk and view on this technology, can you share your insta id, we can connect there and talk further!

[@gSys1337]

Give this guy some likes. I want to see the collaboration video.

[@challacustica9049]

Integza, you are incredible, this engine has been used solely by research labs. Amazing work.

[@ilyes5560]

After following integza for quit a while it's makes me happy to see how he started from making working stuff that looks like a grandma who's waiting it's final moment to be free to Making thing that actually works and looks like it was made to last, very proud of you integza😢

[@survivaloptions4999]

You a couple of years ago: I want to build a decent chemical rocket motor. You, sometime next week or so: My warp engine is running too hot.

[@akiko009]

As an alternative to the primer from gun shells, you could go to a well stocked tool store and ask for the "powder loads" or "strip" for a Hilti gun (aka "Powder-Actuated Fastening Tool"). The nice thing is that those come in multiple strengths, so you can pick one that works for you.

[@ianvincent4911]

Alternatively, depending on Airsoft rules in Portugal, you might be able to buy the 209 primers from Airsoft suppliers, as they are used in Airsoft Grenades/mines.

[@DerekSmit]

I don't know the rules for Portugal, but I think an alarm gum might be legal, it's basically a gun that can sound like a gun but not shoot anything.

[@kenreynolds1000]

I recall Mythbusters setting off .22 rounds with electricity. Those are rim fired cases as well.

[@Fraxxxi]

The DX460 is fully automatic, with a 27 caliber charge. Wood, concrete, steel to steel, she'll throw a fastener into anything. And for my money, she handles recoil better than the Simpson or the P3500.

[@WorldofKlown]

The gunpowder in the shotgun shell won't explode until its confined. Pistol powders burn faster than shotgun powders. The explosive in a modern primer is usually a combination of things based around Lead styphnate. As alternative sources for detonation; You might be able to use something like Armstrong's mixture (usually available premade in pull string fireworks, kids capgun toys, either the red paper strips or the little red plastic 'loads'). Or, the mercury fulminate from party poppers, snap pops, adult crackers, ie the fireworks you throw against the ground.

[@MaxBrauns]

Damn Bro I still remember you working out of your fire hazard of an attic with just a 3d printer and limited knowledge, you have come so far in a impressively short time! Its very inspirational honestly! keep it up man!

[@gabedarrett1301]

It's quite impressive how you're able to make these projects, especially since this is cutting edge technology that governments, corporations, and universities are researching. Truly outstanding work!

[@azbolicle1]

Then bro tells us how to for free 💀

[@kiyoponnn]

​​@@azbolicle1 Well yeah open source knowledge is how you keep the corps' and governments' egos in check edit: wasn't expecting the japanese song and death note reference

[@andchip.s]

Like all great inventions, they started either in a basement or a garage. Governments and universities have much higher funding and facilities however this does not mean they are the be all end all, the real genius is to cobble together or make the parts your self, that's the spark of ingenuity.

[@CoolaDiamond]

​@@azbolicle1 You need to pay with everything you have + 7 billion dollars.

[@azbolicle1]

@@CoolaDiamond wait no my student loans savings- WAIT NOOO

[@jerrydaboss1]

It's so cool to see how every video his design gets better, materials get better, and his success rate improves.

[@spinwarecorvallis9414]

I've recently been stuck on spinlaunch, I've watched so many videos on there machine. And after seeing your videos here's my idea, I think you should build a miniature spinlauncher, you have plenty of knowledge of rockets and other propulsion devices and could use them to power the spin! Tomotoes are disgusting

[@Xfixiateher]

this account was made on; Joined Sep 28, 2022 1k likes? zero comments? all alittle suspect to me. guess someone really wants that printer.

[@5failedbubbleo489]

I also want that printer 😭😭😭

[@boisq97]

@@Xfixiateher not only that but spinlaunch is a scam

[@spinwarecorvallis9414]

@@boisq97 they are a multi million dollar company that has shown time and time again to have a successful plan.

[@kajtus5510]

@@spinwarecorvallis9414 kzbin.info/www/bejne/b6vMeHxmnp6JmKc it's bullshit

[@rossvoorheis2391]

Man these videos are getting so good. Buddy went from homemade carbon fiber pulse jets to visiting national labs and working on cutting-edge stuff in the space of a year, all while managing to educate his audience. Well done.

[@hakanero]

Rule 1. Fire never touch rockets parts. Fire begins outside of the engine. Rule 2. Fuel + Oxidizer mix preheating starts before fire zone. Pressure gives a lot of heat. This rocket engine burnout in short time. Like your engines.

[@samreid6010]

The part with you standing up against the door when it went off reminds me of when I used to work for my local utility. One day I was at the plant while they were doing an inspection of one of the gas turbines. I didn’t have much to do that day so I stuck around and watched. They finished up and went inside to spin it up for peak and I was just watching from the corner when one of them turns to me and says, “you’re in the no no square” Apparently, once the generator has synced up its voltage and phase to the grid, a massive breaker trips to connect the generator to the grid. If that connection fails for some reason there’s the possibility that all the power that generator is making will explode out, ripping the massive steel breaker door off its hinges and sending it straight through the no no square and whoever happens to be standing in it.

[@connorwoods3652]

That's insane. I'm more curious about that than anything else now lol

[@792slayer]

"OSHA approved"

[@samreid6010]

@@792slayer it was a coal plant before the coal boilers were shuttered so there is a thick layer of coal dust covering half the plant. If there were a fire that place would go up like a torch, so yes, OSHA approved

[@792slayer]

@@samreid6010 oof. That's hazardous as all hell.

[@leovillant768]

The no no square

[@andrewdoesyt7787]

Video idea: Build an Ion drive propulsion engine! It can be quite simple, MIT made one that’s pretty much just a positively charged cable parallel to a negative, they made it generate thrust, so Basically it’s a glorified air purifier with a cable behind it. There are some other more complex concepts like the ones they use on spacecraft (every SpaceX star-link satellite has one), although they are more complicated and expensive.

[@xxportalxx.]

The plasma channel just did a video on one I think

[@maulidonda]

Hmm do you have more info on the simple ion thruster? A link maybe?

[@Meowzofficial]

in 3 years he makes a nerva / atomic engine

[@usp211816]

@@xxportalxx. pics or it didnt happen kzbin.info/www/bejne/pKOoc6KGjrhnpNU&ab_channel=PlasmaChannel

[@leno_8667]

@@xxportalxx. true

[@netanelelbaz7247]

I love your videos!, create a drone powered by a rocket engine!

[@chargonium1]

Y E S

[@slatetechnologies1724]

That would be too expensive though. 4 ROCKET ENGINES on each side. Also the RC gear would be too heavy because you have to throttle each engine to make it lean in a certain way. Also throttling a rocket engine is not as fast as slowing down a BLDC Motor.

[@netanelelbaz7247]

@@slatetechnologies1724 :(

[@slatetechnologies1724]

@@netanelelbaz7247 What?

[@3dpprofessor]

@@netanelelbaz7247 So, a couple of things to consider with this idea. Most drones achieve rotation by taking advantage of the rotational inertia of the propellers. But rocket engines don't have that, so simply replacing props with rocket engines will result in a hover-only drone. Instead it would be best to do it the way NASA did with their Project Morpheus; a single rocket engine to provide hover thrust and smaller engines to stabilize it and provide side thrust. Which brings up the point that NASA's already doing that. Also, don't beg for likes.

[@quistador7]

This is so awesome. Pretty insane that we get 5 min of incredible footage that probably took months to plan and bring together

[@wimtzw]

My theme suggestion is to create a load cell to compare the different engines you've made so far. Seeing these home-made 3D printed engines is great. But giving people context like how much force this engine is producing, and maybe how much fuel its using compared to other engines you've made, might be even better.

[@SnoopyNug]

Damn dude I can’t wait to see the engines you’re making in 3 years. Every video you improve your building technique and they work better and better

[@LordDecapo]

RIGHT!?!?! this one is blowing my mind.... exponential growth on his part it seems

[@Praecantetia]

eventually he will work for nasa

[@Dindonmasker]

bro it's not rocket science... wait...

[@leocabaret7050]

In 3 years, he is gonna have an actual metal 3D printer

[@SnoopyNug]

@@leocabaret7050 I am so excited for this man to start printing metal engines

[@chrissmith7669]

It wasn’t just the F1 but the SSME also had problems with acoustic instability as i recall

[@MVPhurricane]

oh man integza this might be my favorite video you've ever done! the break in the middle where you're playing the japanese song and cut the tube in half with the little effects and stuff is so great.

[@karlheinz6880]

Idea: I would love to see you use a piezo pressure sensor with an oscilloscope and a high speed camera so we can see whats really going on and maybe improve the engine. ( i know high speed cameras are very expensive but maybe you can lend one locally or from Dave of eevblog)

[@Takatakyong]

I have a feeling that a pressure transducer that is able to read such high pressures would be ridiculously expensive. But it would be rad to see

[@dtibor5903]

@@Takatakyongcars have detonation sensors

[@hjjfffaa]

@@dtibor5903 Those are acoustic, specific for a frequency, and not exposed to an environment harsher than a warm engine block.

[@karlheinz6880]

@@Takatakyong I mean if acrylic can hold the pressure its not that high ;) If not maybe a throttle/throttle valve could lower the pressure to the sensor range

[@KingofArsenal]

This hands down is your best project yet, and that is saying something since your other have been better that the last for nearly a year straight now! thank you for this channel! keep it up!

[@Allan_aka_RocKITEman]

@integza >>> *_"I'm still gonna build one."_* And THAT is why WE LOVE THIS CHANNEL...😊

[@bradleydennis210]

RDEs are typically an annular design with a center spike (similar to aerospike), so you could potentially try using a cooled center spike to guide the rotating detonation wace around the circumference Edit: In addition, the detonation wave propagates around at the inlet of the chamber so your ignition source/detonation seed should also be closer in that area

[@npsit1]

That's what I was thinking. If you just have large open combustion chamber, the combustion doesn't really have a path; you just have to hope it'll stick to the outside wall.

[@dongleseon8785]

If you read the original paper they specifically say that it's achievable without inner cylinder. But it probably makes it easier.

[@pancakemonkey1543]

Instead of having the fuel go through to try to cool the center you could just have the feul or air cool the outside wall like on the space shuttle rocket motor

[@b-e-a-r6166]

RE your comment about the central spike, that had also crossed my mind. I didn't even think about where the detonation should start. Thanks!

[@dongleseon8785]

Another problem which becomes obvious if you open up his 3d file is that the injector is placed in quite bad manner that oxy and fuel won't be mixed in time. Edit: the paper he referred to has initiator 65mm apart from the injector surface. I don't think it should be close to the combustion area. Plus, geometrical bump from the initiator might disturb the shockwave. You don't want to have shockwave echoing around especially because it doesn't have guiding inner cylinder in this case.

[@tetronaut88]

Two ideas for future videos: use one of your amazing engines to power an RC car, or do a comparison video, comparing some of your engines based on thrust, fuel consumption etc.

[@h3enryfoglia318]

Cooling a spike in that time is near impossible, I would try ceramic hoping that the detonation does not shatter it

[@mateorandomvideosmrv8823]

The level of your videos are improving everytime, not only in design and performance, also in post production, clips etc.

[@hopper131]

100%. It's also time to let the pseudo-Tesla look go. Ultimately it's distracting from the presenter himself, and his message. Schtick only goes so far.

[@KirsiKitten]

Absolutely, this is one of his best yet!

[@WarttHog]

And very slowly, safety! Lol

[@anteconfig5391]

Hey there Mr. Integza!!! I just wanted to say that gun powder does explode. It just needs to be put into a container. When you ignite the powder it quickly turns into gas (keywork: quickly). When the container can no longer hold the pressure of the gas released by the gun powder then the container rips apart allowing the gas to be expelled forcefully in all directions. That's an explosion.

[@ShireaTV]

I swear every video gets me more excited to see what the next one is. the rocket engine experiments are so cool the way you do them

[@AiOinc1]

This guy is insane, that's some amazing high speed footage too Also, using a smaller engine to start a larger engine is not terribly uncommon. They're called a pony engine usually, and a lot of industrial engines and tractors have them.

[@chryssalidbait8765]

Your car has it. There's an electrical motor that starts the gasoline engine.

[@tarcisofilho4878]

@@chryssalidbait8765 YEah, and larger turbine engines rely on pneumatic starters.

[@blu5021]

They use them on commercial jets and i think on the A-10 warthog

[@johnbeauvais3159]

You can make a suitably sensitive primer type powder using Armstrong mixture from matches. The gun powder you used is actually smokeless powder, it’s nitro based and burns slowly at stp but burns much faster under pressure. Black powder (the old sulfur and charcoal stuff) burns faster at STP but doesn’t increase burn rate with greater pressure.

[@mikker32]

That is not true BP does burn faster under pressure

[@justjako9145]

@@mikker32 even if it does nitrobased gunpowder is more powerfull

[@haydennorris2913]

He didn't use gunpowder, he used the primer. The primer is usually a high explosive lead salt.

[@linusc.3812]

BP also drastically increases its burn rate when confined/under pressure, but not as much as smokeless powder.

[@4DRC_]

My man’s building a rocket to get as far away from tomatoes as possible

[@dillonvandergriff4124]

Idea as part of the next video: a proper (transparent) blast shield! With the explosive nature of projects on this channel it could come in handy!

[@runed0s86]

@@Mr.Beauregarde did you make a bot to detect and tell people to report scambots‽ If so, you are awesome!

[@antonjeyaseelan2365]

Wow.!!! Now including interviews with scientists and engineers, shows how genuine your work is. Your humour is what makes your channel, pure class. I look forward to every post you do.

[@poptimusoime9166]

Did…did you just build a rocket motor that…actually worked?? As someone who’s been following your progress for a few years (or at least it feels like it) I am very happy and proud to see this

[@cliryu]

hey if ur looking for the song used at 10:50 its hoshimuru yoruni

[@unvergebeneid]

I kind of want to see more from this RDE guy. Super interesting subject and he's very engaging! Also that setup is absolutely rad!

[@marsgizmo]

Can’t wait to see a tomato vs the next RDE 😈.. impressive project btw! 👏😎

[@flowerfullgirl_]

rde's are the future

[@urmum8540]

this is actually insane, ive been watching you religiously since you started, going from pulse jets to actually pushing forward hobby solid fuel rockets

[@johnlynch-kv8mz]

9:30 Yeah, no one wants to be standing next to one of those while it’s operating. I think that tomato was traumatized forever.

[@grinreaperoftrolls7528]

You’re a massive inspiration. You make high level research accessible and understandable. Part of me wishes I was still in physics.

[@cpoco]

Perhaps before things get (more) dangerous... an episode where you investigate the best blast protection solutions?

[@johnt8031]

I like how much he never lets anything get him down, he keeps saying n trying.. it’s great!

[@SapioiT]

I think the issue might have been that you're not spiraling the airflow before it gets to the nozzle. That seems to be the way to get the detonation spiraling.

[@jrtanker2271]

Primers used to be mercury fulminate, but now they can differ between brands in their composition. The main thing is the powder, it must be compressed very tightly to itself and in a confined chamber to achieve the reaction speed you want just like it is when the shotgun shell is put together. It can also be rather hard to ignite properly which is why the primer is used for repeatability.

[@blurglide]

If he uses some kind of burst disk to momentarily contain the powder, he might achieve detonation

[@burningSHADOW42]

The "Centerfire ammunition" article on wikipedia goes into detail in the primer chemistry. Short form: mecury is not used anymore, modern compounds are really complex and contain lead, although some "green" ones are starting to get more popular.

[@jonp8015]

Yeah, it's funny how they switched from Murcury Fulmenide when they figured out how bad Mercury was... But what they changed it to was Lead Azide, because they didn't know how bad lead was yet... Now the standard is some kind of weird organic compound I can't remember the name of. Well, unless you got ammo made in the third world, then it probably still uses lead and mercury compounds.

[@jacobalberty]

Isn't it usually lead styphnate now?

[@burningSHADOW42]

@@jacobalberty according to Wikipedia, half of it is. The rest is a combination of other stuff. At least in the US. In Europe it might be different.

[@EngineerBrunS]

You are really crazy! Please keep going! :))

[@integza]

I SHALL !

[@3ch0_17]

I believe if you add a little bit of restriction to the nozzle of the engine, like the metal one in the lab, it will allow for a little bit of pressure to build on the inside which might help promote better detonation. It seemed that you had an original detonation followed by deflegration

[@dongleseon8785]

I don't think you need restrictions on RDE. Whole point of RDE is that the exhaust is already supersonic without use of nozzle.

[@3ch0_17]

@@dongleseon8785 then how come the metal one in the lab has a type of nozzle?

[@dongleseon8785]

@@3ch0_17 I think that's just a inner-cylinder that has narrowing ends? The whole thing looks quite straight cylindrical to me.

[@3ch0_17]

@@dongleseon8785 could possibly be. But I'm seeing that the size of the exit is smaller than integzas design

[@dongleseon8785]

@@3ch0_17 I guess that would make a pressurized fuel mixture judging by the flowrate they use. Which would help greatly if your goal is to make a lot of thrust. But would the 3d printed part of integza withstand that kind of pressurized explosion...?

[@ericdemeo5249]

I’m a machinist and have made parts for DOD and SpaceX and an inventor at heart. Curious why couldn’t you have a cylinder with small jets machined in the sides to spray in the Hydrogen/oxygen,air? If they were machined in at an angle you would get rotation with out it being able to interfere with the port/valve. Also if you rifled the chamber with the spiral stretching twords the out put end it would circulate and then slowly in terms migrate to the output side. If the pressure with added fuel and air would naturally force the migration of energy out the end ( I’m not a physicist) then you wouldn’t have to do rifling

[@butterball2000]

This was one of the most interesting things I've seen in a long time. I did even know this existed and you taught me something new.

[@Fancysaurus]

Just a note for future projects. Instead of harvesting primers from shotgun shells you can get what is essentially just the primer on its own. Its commonly used in some nail guns as a way to drive nails through harder materials. No clue if you need a special license for it where you live though.

[@jamespray]

After all these engines, I'd like to see you build a generator! A turbine gen like a jenbacher would be pretty cool.

[@VanWarren]

I really like this engine. There seems to be a really high frequency sound, even ultrasonic when it was running on your trip, and possibly in your lab. If you used propane which is widely available in cylinders of different sizes instead of hydrogen, you could still produce a detonation with a relatively clean exhaust. If you could use air instead of oxygen and sustain the rotating detonation wave that would be fantastic also. If you took several, say 5 of these units made of extruded clay cylinders and placed their exhausts in an axial bunch, and then twisted them with front and back endplates like a manifold, you could put a greater path length in a shorter package. If they were made of ceramic they could tolerate the heat better than metal. The nice thing about these RDE's is that they could run at very high Carnot efficiencies. Ramjets have a low theoretical efficiency because they depend on the Ram effect to compress the air. RDE's could get around that by performing the compression rotationally and thus centrifugally. The figure of merit would be, like fusion, how long can you run one of these things sustainably if mounted to an RC model. It would quickly vanish from radio contact, but you could use ham radio or ISM band frequencies and a larger antenna to track it.

[@jlfqam]

the problem with the RDE is that the combustion takes place on the walls of the chamber, so the forces are directed towards the nearest or the opposite walls, so no net push takes place, well just a shake, but a pressure buildup that blasts the chamber. The net force that causes thrust is the one directed towards the closed end of the combustion chamber which is not compensated by a like force from the open end of the chamber, i.e., the exhaust, because expanding gases move out of the chamber. This is what happens when a shotgun is fired with something blocking the expanding gases trying to move out from the barrel.

[@BonesyTucson]

I appreciate the fact and I am humbled that as basically an English-only speaking guy, folks from other countries are making so much stuff in english. Thank you.

[@TheREALHelly]

I don't think there's been any of your videos that have turned me on to Rocket Science as much as this one... seeing that RDE in action has got to be some of the most inspiring moments I've experienced... just flabbergasted

[@verablack3137]

You know if you build a simple wire EDM lathe you can make parts with tungsten, and I hear that handles heat pretty well

[@1mariomaniac]

Tungsten is about $100-$350 per kilo on average. And tungsten is *heavy.* A 4 inch cube of the stuff weighs 41lbs. (18.597kg)

[@nefariousyawn]

Yeah he really likes to limit himself to 3d printed prototypes. It would be cool to see him get into more advanced kinds of machining on the amateur/hobbyist level.

[@ledocteur7701]

tungsten is extremely expensive, heavy and hard to machine, and EDM lathes aren't exactly mainstream equipment. even just upgrading to aluminium and brass would allow him to do so much more, and if he gets the equipment to use aluminium and brass he could also use some steel. let's not skip half the ladder and go straight from 3D printing to actual rocket science, that would be a bit silly.

[@peteabc1]

there's no such thing as simple wire EDM lathe

[@rafaelsueyro7825]

Unfortunately, tungsten is also very brittle. Tends to crack and handle pressure and vibration not very well. Even so, an alloy containing tungsten maintains many of its thermal properties without inheriting brittleness.

[@justinanderson267]

Should I build one of these? Engineer: Absolutely not! So I built one anyway. Blueprints in description. xD Legend.

[@jacobe2995]

this is the best episode you have ever had. I am so glad I found your channel. BTW you can try and get some cement nail gun loads, they are basically 22 shells without the bullet tip and you don't need a license to buy them in most countries as they are common construction tools.

[@Smallathe]

A very neat test! I don't think you got to actually make a rotating PDE - but that is a descent attempt. I would love to see either form of 3D printed PDE actually taking off up in the air. It probably will have to be a theathered flight test... But I am doing more than just asking - community effort, right? - I'm also offering - I am more than willing to machine parts for the project too!

[@yeetbeam2273]

Someone get this man to the top of the comments

[@cephotographic]

Maybe you need to add an aerospike so the detonation has something to spin around. The Miles-Bach-Michalski engine has a central spike though it was truncated. Another thought is to move the primer to the back of the device instead of the exit port and angle it to induce rotation. The MBM engine had their starter in that position. Also being in the Northern hemisphere you will want to spin anti-clockwise so you aren't fighting the Coriolis Effect.

[@EbenEliasjr]

Would that not make a bad engine design for practical use, a jet flying north to South across the equator, for instance how would that affect the rotation?

[@serbianspaceforce6873]

⁠@@EbenEliasjri don't think the coriolis effect is that big of a deal

[@EbenEliasjr]

@serbianspaceforce6873 That's what I said. He was saying to have it spin anti-clockwise, and I said, "Is that not a bad design? What if the plane flies north, what really matters is the airflow through the engine and pressure gradients not the spin...otherwise we would notice a huge issue in modern turbo fan jet engine planes... any way your right and I agreed 👍

[@jamesjohnson5700]

Learn to keep ideas to yourself. You're not getting paid to share information

[@cephotographic]

@@EbenEliasjr this engine has no moving parts. Only the shockwave rotates. The Coriolis Effect would be slight and I trying to think of ways to tweak performance especially at the small size @Integza was using.

[@MegaBanne]

In Sweden we call pure hydrogen and oxygen (2:1) mixture "knallgas", which means literally "bang gass", for a reason lol.

[@Stingdrone]

Thank you - the external experimental scientific input was a great idea! You are really working hard to deliver knowledge on a very easy an comprehensiv way! Thanks!

[@chasethevioletsun9996]

Thanks so much for this video. It's been my ambition to build a tiny RDE for a while now, and now I have a few critical questions answered and new resources I hadn't unearthed yet. Keep up the amazing work!!

[@jakeking974]

I know it's probably unbelievably unsafe, but the human male inside me wants to see this made into a firework and see just how high this thing can go even at a microscale like you used. I bet it would be crazy amounts of initial thrust.

[@TBButtSmoothy]

its funny. working on model rocketry, model rocket math is way more tedious and are way harder to manipulate than big ass rockets..

[@crypticgamma6308]

​@@TBButtSmoothyas someone with no experience with any form of rocketry, going off of what you are saying, I'd imagine smaller scales mean higher precision and less margin for error.

[@Flesh_Wizard]

"the human male inside me" _🤨_

[@roedurham3499]

This, forever!

[@nikkiofthevalley]

@@crypticgamma6308 Yes, but that doesn't mean the math gets more complicated. The actual complexity is from all the small-scale effects that don't really do much at larger scales, but can cause massive issues at small scales.

[@joe2501echo]

Oh, just so you know, cap gun ammunition is made of a thing called Armstrong's Mixture, which is very similar to primer, and doesn't involve nitroglycerine.

[@PrebleStreetRecords]

Fun gun/primer facts. Most modern primers use lead styphnate and a blend of other herbs and spices. However, older ones use lead azide, or mercury fulminate. Also, smokeless powder like what’s found in those shot shells just deflagrates, it isn’t a detonation like Black Powder does. Different powders have different “speeds” they build pressure at, pistol powders reach peak pressure faster than rifle powders (generally). If you’re looking to repeat this, check out primers for muzzleloaders (usually called caps). In heavily regulated countries they tend to be easier to acquire than centerfire primers like the #209 in that shot shell. There are also companies like Prime-All who sell primer component mixes which are themselves not regulated and not explosive, but can be used to create a primer mixture. Great video, and it’s a bit funny to me that it’s so tough to get ammo components there- I can buy them at my hardware store!

[@fendermarxist]

black powder doesn't detonate either, it's actually one of the slowest burning things we classify as an explosive. you basically never want a high explosive as a gun propellant, too much risk of rupturing the barrel. the projectile doesn't accelerate via shockwave, but by building up the pressure as the propellant burns; that pressure then pushes the projectile down the barrel. incidentally that's why it looks so unimpressive when he burns it in the open; without that controlled pressure buildup, it's basically just a really expensive pile of tinder

[@Tunkkis]

You can also acquire blanks for powder actuated tools in many European countries.

[@braindecay9477]

​@@Tunkkis or be Austrian and over 18, then you can just buy the black powder in gun shops (and I'm assuming also smokeless powder, but black powder for sure. Can also get a rifle and rounds if you're at it lol, and we're not even close to the most liberal gun country in Europe)

[@BooBaddyBig]

You might think it's funny, but that's partly why his country doesn't have mass shootings every single day.

[@Freezer003]

​@@BooBaddyBighahahahahaha hahahahaha and spoons make people fat. NEXT.

[@joshuafedorchuk1257]

God bless you mister. I really like the reality of a RDE. I didn't know there was a higher form of combustion that hasn't yet been developed. What a blessing you are, 3D printing engines like a mad man. Keep up the good work!

[@LMF1716]

It's awesome seeing how much progress you've made in making engines, it would be an interesting project to see you try and make a radial engine

[@johnlynch-kv8mz]

7:28 I could like anime. I like your channel. You brighten what is inside my head with your clear explanations, and demonstrations.

[@stealthboombox]

You probably gathered this but you're probably going to need to design a better arrow spike similar to their's. It looks like they had to focus that gas path a lot in order for you to push a literal wall of air. Also look into a Pocket NC milling machine if possible. (For this project as well as others this, will save a lot of heavy metal headaches.)

[@matthewblender9431]

Here’s my suggestion for a future vid: I would love to see you tackle acoustic propulsion, the kind that can levitate objects midair. Although a bit different from rockets, I think its got a lot in common with what you’re doing, propulsion and its application. Thanks for all the amazing/inspirational content!

[@seditt5146]

Totally agree, I been attacking this problem hardcore for over a year now and the knowledge it has lead me on to is more valuable than the initial experiments in the first place causing me to pivot to a faraday wave like model for quantum mechanics I am working on which does away with virtually all of the weirdness with QM and seems to be capable of explaining oddities such as why particles come in threes.

[@azibros]

💡 idea: build a liquid cooled rocket engine so they dont melt down!

[@lucastaylor2408]

He did already

[@azimations3216]

@@lucastaylor2408 which video?

[@lucastaylor2408]

@@azimations3216 it’s one from 4 months ago

[@FBforlife-ix2pv]

He did it

[@azibros]

@@lucastaylor2408 oh..

[@erictaylor5462]

In the Space Shuttle they used 3 engines from AIM-9 air to air missiles to light off the SRBs. They only needed one, but the last thing you want on the Shuttle was to have one SRB to light wile the other fails to light.

[@ashleyfletcher2543]

The saddest thing that I got from this video is how hard it is to get gunpowder in your country. You're extremely intelligent and making black powder and smokeless powder are quite easy.

[@IZD3d]

You should have a build series of some kind of aircraft with one of these engines and then test it out I would totally watch the whole thing, keep up the awesome engine videos I think we all enjoy learning about them!!!!!

[@joshuamiller2114]

Thanks for propping up Erased, I was looking for something different to watch and this was incredible.

[@thevindukottege8799]

As soon as I saw the power of an RDE, I immediately fell in love with it. Such an awesome concept that we shamelessly hide it away in archives. I really appreciate you for educating us about such cool engines.

[@ArsonalTech]

Erased is my favorite anime of all time. It will absolutely destroy your feels and will make a grown man cry. So good though

[@jsteinfeld14]

After you mentioning the RDE at the end of your last video I did a dive into the depths of KZbin and watched way too much of a Thesis presentation on an RDE. I feel like with how difficult it is to manage this type of engine it would be great as an accelerator for space craft when beyond orbit. It allows extremely strong thrust at very quick reaction speeds when direction changes are needed.

[@thefourthdymensionmusic]

i feel like an engine large enough to lift a large space craft would probably cause some issues with the surrounding area during launch so that would have to be experimented with and tested. considering the one the two guys had built was strong enough to wreck havoc in a tiny metal room. definitely a really interesting idea though, and could possibly be implemented after contingency plans and side effect solutions are crafted.

[@jsteinfeld14]

@@thefourthdymensionmusic yeah I think I didn’t explain well enough or maybe you just misunderstood, I’m talking about engines for post orbital levels. An engine with this much power isn’t stable at long use times so using it in space rather than on earth makes more sense especially when sustained thrust isn’t required, having extremely powerful engines to make large velocity adjustments in a small time is valuable especially considering the efficiency. You can still use traditional small thrusters for fine adjustments when doing things like docking etc. and large traditional rockets for initial liftoff. We’ve found use cases for most types of engines and this one feels like it has a place just not one where it has to be used for long periods.

[@wicketprofessor375]

is it just me or is it just incredible how he achieves miracles from garage tools. Integza I really look up to you. Keep going!

[@marz.6102]

Proud of how far you came and how hard you work Simply amazing

[@sh3llz2]

Tomatoes are AMAZING... Theyre the base of the best sauces.. Besides mushrooms. BUT, im experimenting with sautéed vinegar apples.. Ill let you know how it turns out!

[@zertonix9605]

I love that you´re getting even more into these engines and help to understand and build them! My idea for a future video is "relatively simple": An open cycle - gas generator rocket engine. I hope you´ll build one of these sometime because I think you´ve gained a lot of knowlegde throghout your last engines and you´re ready to try one of them.

[@jmstudios457]

While gas generator engines tend to be lighter and have cheaper, lower risk dev costs, they really have no reason to be used at the low chamber pressures of amateur scale liquid engines. There's a reason not even university teams have seriously attempted it. For chamber pressures under at or under ~300 psia, pressure fed will do just fine.

[@vesstig]

I love watching the evolution of your content from your first engine tests, keep it up and the quality keeps getting better!

[@Maymerich]

💡 idea: you can use the compressed fuel (hydrogen/oxygen) before entering in the combustion chamber to cool down your the engine so it dont melt down!

[@John_Falcon]

We all need to get into nano 3d printing, but just don't let your nano 3d printer attach to a network, because I'm sure Sophia or some A.I. would love to borrow it for very terrible things.

[@hermeslarima9136]

This video is at least in my opinion a huge step up in the right direction. In a few important areas. I'm looking forward to see what the community and you will come up with. 👌

[@jeffhawkins8921]

You should see if you can print a engine like the Omega One. I'd love to see an indepth video even just explaing the physics behind its operation. The RDE is amazing though, excited to see what comes next with RDE development

[@pereesteve6944]

I think you could try distributing the O², with a conical piece, like Professor Mails' model. It would help the angle that the gases intervene

[@pereesteve6944]

this modification would be perfect

[@connorsilvertree258]

Gunpowder isn't used in firearms these days. Smokeless Powder made from nitrocellulose is used instead; it produces more gas and less gunk, so doesn't foul the mechanism or barrel. Because it is black, and therefore looks like gunpowder, some people still use the term 'gunpowder'.

[@entitxy_4810]

I'd love to see a video comparing the efficiencies of the many engines you made, though this may be difficult since different enginess use different fuels etc etc. Nonetheless, it'll be neat at least for engines that use similar fuels Also, to get a detonation, look for a nail gun; some use basically lil blank shells to shove the nail wherever the nail needs to be, and with a little safety-blind engineering could be used for whatever detonation application you need

[@DigiLab360]

Awesome video, thank you. You can use a 433Mhz transmitter/receiver (MX-05V) as the remote trigger. Extremely cheap and gives you 4 channels for switches. If you need higher voltage/Amps, just add a Logic Level Mosfet like the IRLZ44N. The toy is a great idea, but such a waste of plastic.

[@reubenhegerty9289]

I think a linear aerospike engine would be interesting to see you try to make. Keep up the good work 👍

[@mikewebster2761]

This reminds me of a poem by Bobcat Goldthwait, “ Gene Gene made a machine, Joe Joe made it go, Art Art blew a fart and blew the the whole god damned thing apart”.