Also interesting to see that Aerospike-type nozzle is being tested alongside! As an Engineer who loves CFD and Aerospike, I would love to see what the future holds!

It would be good for you to take us one level further/deeper. a) materials b)fluid dynamics c)logic/computer control d) instability sources of continuous D .........

RDE looks like it oculd be the next step in Aerospace engines. Computational fluid dynamics, as my favorite Physics prof at the U of A used to say, don't forget to carry the one.

Great video! I just learned about this for the first time, but this short video really covers all the bases regarding limitations of the pulse detonation approach (shock wave noise and vibration), along with the possibility space for future developments (AI-developed materials for continuous pulse detonation commercialization; rotary detonation, essentially a continuous series of timed detonations). Mach 5 is a nice dream but the materials to support that using pulsed detonation still need to be invented!

I’m a little late to see this… but I have some experience working on/with linear aerospike engines. I worked on the Lockheed Martin X-33 (the prototype technology tester for the LM VentureStar), and I spent a lot of time with the good people at Rocketdyne, who were developing the XRS-2200 Linear Aerospike engine. I have always wanted to see this concept in use, and I attended most of the XRS-2200 tests that were performed at Stennis in Mississippi. These engines were very, very promising. To me this was the most important technology to be tested on the X 33 as everyone knows the X 33 was canceled in March 2001, but we did at least get working linear aerospike engines and we had some data on those. The difference that I can see between the engines you’re talking about (with a pulse detonation in a circular motion around the periphery of the ramp) and a circular aerospike engine will be that a circular aerospike engine would have all the thrusters operating simultaneously, and continuously, rather than pulses - moving around the periphery in a circular, tornadic fashion. I like this idea, except I would be more comfortable if the thrust were more symmetric about the center of the circular ramp. In other words, why couldn’t we have two detonating simultaneously across the center of the circular ramp from each other? I’m always a little uncomfortable about any kind of nonaxisymmetric thrust on a rocket engine, even if the pulses moved very quickly - there would still be some thrust vectoring (TVC) that might be an issue. I think this is something we would want to avoid. The concept of aerospike engines with the external ramps is a very old one and it’s back to the 1950s. There was an instance of somebody (and I can’t member who) that put a circular aerospike engine on a barge… and they were able to get some good data from that test. Great video, thanks for posting this! Cheers from New Orleans. 🥃

If they really get an RDE working, ready for production, it's going to change more than just orbital economics. It will change aviation as a whole. Definitely one to watch.

Thanks for taking the time to make this video! It makes a very complex subject more understandable! Well done, Cheers 👍

The KZfaq creator Integza made a really fascinating video with some scientists who're researching the rotary detonation. The video demonstrates the force and heat produced from relatively small RDE. Pretty cool video that I would suggest to anyone interested.

I like the format of your video - no lengthy intro, dense technical info unlike dumbed down pop science channels. Love it!

i am happy youtube suggested this video to me, i never heard about an RDE or detonation supersonic wave. makes me want to know more about these topics :)

Great Videos, we appreciate you taking your time to produce them !!

It’s ironic that the one main flaw in the internal combustion engine, the air flow around the edge of the bore to piston, is the bases of this technology. Love it and love your content a lot.

Cool, I always wondered about these. Looking forward to more now.

Fascinating. I've been following this concept for some time. I am curious whether you can express the output in terms of Isp ( Specific Impulse ).

Rotation detonation ,never heard of it,amazing and the alloy,thanks

Another fascinating video. Thanks for making it. I’m very curious what AI engineering systems may come up with for this class of engine.

Great video! Was expecting something different from the title but pleasantly surprised the space war hasn't started... yet

I always wondered why this promising propulsion system is not heavily used in aviation and rocket engineering. Thank you for explaining, great video!

Very interesting rotational explosions that create some awesome thrust. I was thinking about linear explosions to create a constant thrust.

So much great info in such a concise presentation! 🙂

Perfect demonstration video. Controlled detonation is an ultimate logical future of chemical reaction thrust!

The German V1 cruise missiles they shot at London in WW2 used a pulse detonation engine. That is why they made that infamous prattling noise people who experienced it often mention. So it can't have been too complicated a principle if it predates the first fully functional jet engine.

Thanks for a very rare video; NEW facts presented without hype.

I think this needs a lot experimentation with many different designs, which might then result into some hobby designer finding a weird solution that is designed in a way that it fixed most problems with keeping the detonation rolling.

They'll be fine for thrusters but long burns will hit the cooling barrier that confounds aerospike engines: The cooling demand rises by the cube and the cooling ability rises by the square. The NASA demo engines used a cooling method that's too heavy for flight. Once again Earth just barely lets us into orbit, but we're getting better.

Well explained video, about a very interesting subject! Thanks for posting!

Love it. Very interesting video, and it’s very clear to me now - all we’ll have to do is place this new engine in front of all the rockets so that they are engulfed in the superheated exhaust. That should certainly destroy the rockets. Great video 👍

NEXT LVL GEN GO GO GO

An exploding tornado. Why does this sound slightly worrying? 😂

3D printing engine parts is so cool since it allows far more complex parts and substantial (low volume) production cost savings. Testing and modifying the design is much faster and cheaper too

fascinating directions this can take. with materials and 3d printing more strange designs are possible

This type of breakthrough in science always fascinates me ever since I was a kid👌. I thirst for knowledge

I know what you're trying to do, think of it as a sprinkler. Every time the sprinkler lists off a water spout there's a valve that pushes forward and then hits it to turn this all it is. So basically every time there's an explosion it opens up a valve and then once the bow comes back it turns it and then it opens up again so it means you'll have a constant variable explosion in the same or in different valves without having to worry about the same valve being damaged. It also allows it to cool itself down as it changes between valves like a sprinkler would do every time it turns.

Great video. Like Robert V. ... all important bases covered!!! Thanks.

What a time to be alive

My neighbors already hate my cars exhaust. I can't wait to unleash the exploding tornado.

looks like the future.

Looks to me that RDEs have a very bright future and I think it is only a matter of time. It will take time to figure out the proper configuration and dynamics for this engine to take us to the next stage of Human space exploration. If we can manufacture an engine that is capable of taking us to Orbit in the way that this engine does, and make it so that it isn't trash after the flight up, then we can begin to make them bigger and more powerful to the point that they are reusable, and fully capable of operating in the vacuum of Space, then this engine is going to be either the engine to take us there, or the father of the engine that'll take us there, or perhaps the grandfather... but it is obvious that we need something more efficient and more practical than a Rocket engine.

Nice presentation . This might turn out to be a major breakthrough

Awesome video bro, keep up the good work, kudos.

Just some helpful notions. 1. all materials are moving at a intermolecular level. 2. All motion is temperature... just depends on the scale and permability you are trying to reffer to. 3. All alignments are challenged simply by existing, let alone if you are exposing them to explosions. So the tighter the margins, the sooner it will need corrrecting, the lower ability to correct the sooner it will fail. This technology can work. It needs strong attitudes willing to redoubt preconceptions and offer up sophisticated solutions to correct for problems rather than trying to simply change materials. ultrasonic pulses for example are under explored. 4. Fluid dynamics based on a static container can make for more complex calculations than if one was to use a dynamic container, i.e. ultrasonics or laminar flow calipers, that are able to interface with AI and work out what works prior to formulating formula.

It’s like a hybrid between rocket engine and ICE and rotational concept will allow a constantflow through aero spike nozzle out going gases and keep giving constant thrust great idea

Absolutely amazing.

Interesting. I Loved the, tell tale, spaced Diamond Con trails of the 90s-2000s. I wonder whatthese will look like.

I didn't learn a single thing about this engine in this video besides what alloy it's made of

nEw AeRoSpAcE eNgInE dEsTrOyS rOcKeTs

Great video. Technical enough to understand how it works. But simple enough that us novice do get lost. 😅

During WWII the Germans experimented with Ram Jet engines using coal dust as the primary fuel. The engine was to be mounted on a Feisler Fi-103 or better known as the V-1. The engine produced similar power to both diesel and gasoline. It never got past the experimental stage.

NASA's new engine is also an arrowspike, that maintains better thrust from ground presures though vacuum of space.

awesome video!! I would love to work on things like this!! I'm good at figuring things out!!!!

I came up with a rotary detonation type engine design back in college like 15 years ago using hydrogen and oxygen, but i never pursued it very far as it was very expensive.

Interesting Video, So in a I.C.E. you have deflagration as opposed to detonation, It looks like I'm already subbed to your channel, I will turn on all notifications, as I enjoy this type of content, THX for posting. 👊 😎

Also reminds me of the nuclear rocket detonating nuclear bombs behind it to accelerate it.

2:47 i love the concept "in theory" free contents with clickbait title LoL

I'm a little worried about the rotary component of RDEs introducing guidance issues, but I guess that could be dealt with by having them in counter-rotating pairs like drone rotors.

Thank you for the insightful video. In 2021 the Japanese space agency JAXA sent into lower earth orbit a rocket retrofitted with a rotating detonating engine, the engine was fired for a bunch of seconds dimming the test successful. the rocket was splashed down into the ocean afterward.

Quite interesting video. I wonder if the RDE would actually be quiter. Because once a machine or device moves alot of air or gas noise is unavoidable.

Clearly, we are on the cusp of better technology, and its applications will be based on cost over current tech. Perhaps, a new kind of jet for instance? Would it still be called a jet, and would it imbibe confidence in its use? Surely, thats yet to be seen. Thank you, for your efforts in bringing it beyond a test stand! Good Work!!!

Thank you for the information

Jack of all atmospheric pressures, master of none.

lol I guess detonation is when your car stalls out for a second but keeps putting out fuel and then suddenly it all detonates inside the exhaust system blowing the muffler clean off the car. Thanks Jeep ZJ

A Glimpse of Eternity beckons me of faster than light speed craft

Mind blowing!

I could be wrong, but I think for mach speed flow to occur in the cylinder of an operating engine, other than a diesel type, you would have to have detonation, which is a VERY bad thing. Fuel in a properly working gasoline engine does not detonate, in fact the squish areas in a two cycle engine are designed specifically to try to mitigate that at the cylinder extremes. In a diesel it does operate in detonation mode, but those engines are designed to do that, and you can hear it happening when they run, with all that knocking. When you hear that in a gasoline engine, something is very wrong that needs to be quickly corrected, like large amounts of carbon buildup or overly advanced timing. If anyone reads this that really knows what goes on there (meaning a cylinder flow guy) and I am wrong, please set me straight, but I'm pretty sure that is what is going on, dynamically. Pulse jets have been around for a very long time, BTW, even in use. The German V1 'buzz bomb' was a pulse jet, hence the 'buzzing'. Detonation, much of it, in a gasoline engine results in effects like broken spark plugs and holes in pistons. These are not sought after events. Also, I'm pretty sure that detonation is still called combustion. I think combustion just relates to burning, not the rate at which it happens. How is the design redundant. Redundancy means exceeding what is necessary, or a repetitive system, to have a fall back during a failure, like dual mags on a GA aircraft engine, or multiple computers running in parallel on a voting system, like was in the shuttle, so that one failure does not cause the system to fail, though in some cases it may continue to function in a degraded mode. Does a pulse jet design exhibit these characteristics? I also don't know what you mean by "a normal jet engine experiencing total pressure loss" during combustion means. It doesn't, and is constantly burning constantly provided fuel and producing constant thrust within and exiting the engine. It is not a fuel flow pulsed or pulsed burn system. I love it when people say 'we' came up with a new alloy, process, or whatever. 'We' didn't, someone or some team or group of teams or collaborators did. 'We' didn't go to the moon either, though that is said virtually every time, just a handful of astronauts did. Also, these examples are not new physics, just new applications of existing physics. Things like relativity, in their time, were new physics, newly discovered physics anyway. All physics exist, right now, we just haven't uncovered all of them, almost certainly. Sorry if it sounds like I'm constantly picking at you here. You do a good job, I'm just trying to help you make it better. It is intended to be constructive, and you certainly didn't come up with manners of speaking like the 'we' thing. You have introduced me to things I hadn't seen before as an engineer, so thank you for that. :-) You could do a cool video on materials alone. Go look up the transparent steel, essentially, a plastic with 12X the strength to weight of steel, it would be an excellent example to include, if you choose to make such an episode. It results from being able to maintain 3D bonding throughout an entire piece. This bonding was easily producible before, but quickly went ary and the normal 2D polymeric bonding initiated and maintained, creating a normal plastic, like say lexan or plexiglass, which are polycarbonates, etc.

I made 32 inventions in the 80s and 90s. I figured out how to make error free rigid memory disks doing epoxy fluid dynamics in my head. Thanks for the close-ups at 3:50-4:03. How did you make the ripples between the walls in a high pressure device at 4:50? Where to guide the pressure to? Verrry interesting...

damn..thats actually pretty effin clever

Great information. Thanks

Love the video thanks

This looks cool, I like it

A 25% increase in efficiency will make this happen. Less components and thus increase reliability will also be a boon.The issue now is scale.

I just want the opoc engine to come to market. I would love to see them made and sold as crate engines so I could put them in any kind of car.

Awesome video thanks.

Fascinating 😊

Three of the biggest challenges I see is a combination of resilient materials precise cancellation of heat and shock on the inner surface. If the oressure and heat extremes can be sensed and responded to before they reach the combustion wall then it is s matter of providing adequate cancellation support.

The only real and working aerospike motor manufactured is spanish, the name of the company is Pangea Aerospace. I would even say that these images of the aerospike working correspond to their tests carried out in Germany.

LOVE IT subscribed

making the explosiin comes from plasma or electrical discharge might be something they do later , so you will have a small neuclear reactor that will power the electricity needed to generate enough plasma pulses in the engine chamber

Thanks!

Imagine what you could do if you could control the electromagnetic spectrum down to the atomic level.

Rockets will last until AI tells us how to make worm holes to instantly travel anywhere 🤓

We are going to see some radical engines perfected in the next 20 years.👍

Very cool concept

Wouldn't it be more efficient if they electroplated the 3d printed strocture? I mean it has a very uneven surface

These will do awesome in my new Pod Racer.

What if the exhaust never left the combustion chamber but is kept at a high pressure inside ? The unequal pressure should cause the rocket to move in the direction opposite where the exhaust would normally expell. The exhaust could be kept from leaving the combustion chamber using a intense laser beam aimed at the opening and causing a explosive shockwave to form from the exhaust that would push it back inside. A laser will not produce any significant opposite reaction force when it shoot the beam. This method can save a lot fuel from being wasted as normal rockets would do.

Nice one, which software do you use for your video illustration / animation ?

great video, but you know what would have been nice , hearing the engines that you were showing, justa a heads up :)

Some nice B roll my bro

*_Beats Wiley E Coyote's rocket by a mile... time for new technologies.._* Increased noise was listed as a 'negative' attribute. As soon as RDE is high enough, the thin air will no longer transfer noise. Vibrations from extreme noise (high pressure) will stop outside the RDE, but vibrations will continue inside the RDE as they are transferred inside the actual material RDE is constructed from. *_3D printing complex shapes out of new materials will result in successful RDE._*

Material Science always follows the engine concept design. This is going to get interesting.

silicone graphics and processing is becoming more and more advanced each year. This RDE technology will be perfected soon. Well done NASA

I love how research and development can create better solutions for transport. I have to wonder if there is yet an undiscovered technology that will be a quantum leap that will allow speedy transport to other planets or even other stars.

1 little thing: 0:10 that's a pulse jet, not a detonation engine. the nuance has to do with flame propagation speed being supersonic for the detonation engine. A pulse jet is way slower; as in "mechanical valves" type of slower.

When you started this video, the first pulsing design (40Hz) remainders of V1 rackets!!!😮😮😮 Pulse action was achieved with combustion chamber having spring membrane and long exhaust tube.... Worked with pure Alcohol and 80% Hidrogen Peroxide!!! They build it 83 year ago..😢

Good stuff

RDE + aerospike should prove to be quite efficient!

This and most other videos about RDEs don't convey the absolute ear-splitting, glass-breaking, Aztec-Death-Whistle-esque *scream* they make when they fire. Like something fundamental to the laws of physics is crying out in pain.

The tornado configuration doesnt solve the vibration problem. We would have to find ways of dealing with that too.

You have missed a key point. It is not an explosion that drives a piston but the expansion of hot gasses, including the non-combustible ones, The explosion or rather a fast burn (a detonation would blow a hole in the piston) is usually arranged to be completed on the compression stroke before top dead centre, and then the expansing gasses drive the piston. And a turbo jet works the same way, it is the expansion of hot gasses that drives it. When it boils down to it, these are heat engines.

Excellent video 👍