I have a lot of experience with pulse jets so these are my thoughts, first of the one which have built has a very small operating window and are way harder to start than the U shaped Lockwood types I mostly use, the other thing is you've nearly sealed of the inlet with the Tesla valve so even if the theory worked it would probably never get the air required to run. so guess you'd need a bigger one which like you said wouldn't work as well........but you already have a valveless jet so surely you're just trying to make it work a bit better by losing less thrust out of the intake so even if it only works a little bit it might gain something. My gut is telling me this is not right set up altogether though as valved pulse jets are inline with forward facing intakes. Great idea though so please don't give up

Neat, first rotational Tesla valve I've seen someone actually make.

I really like how you post your failures and then just keep trying over a series.

12:00 - You could create a direct bypass into the tesla valve, so that when starting it you have no loss in pressure. Then as the engine fires up slowly closing the valve to pull air through the tesla valve. Kind of like having a choke to start a motor. But in this case a valve bypass to have better intake air flow to start the motor.

This is. Work of art,

my friend: "why do you like physics so much? its so boring=" me: "so there is this mad Scientist on KZfaq"

I 3D printed a cylindrical Tesla valve probably about a year ago with the intention of maybe developing a pulsejet engine with something along that design. Searching for similar Tesla valves is what led me to your channel and I was super stoked to see you attempt what I hadn't gotten around to trying.

Fantastic historical introduction. This is the reason why I watch a lot of videos on youtube, stimulate my curiosity and learn from the merits of the experiments. But above all to see which failures led to success. Good job!

"The V was for Vendetta" - that isn't even completely wrong.

Ideas: 1: Stronger compressor 2: More valves in parallel flowing into one tube or multiple intakes for several tesla valves 3: Increase diameter of the valve with same canal thickness, meaning more valve area with same geometry 4: Tesla valve bypass to start the engine 5: Complicated and ridiculous but very cool: Tesla valve with VVG like a VTG turbo charger. Not variable turbine geometry but variable valve geometry. It would have moving parts but once you’re at a certain setting it would be fixed. You could even tune the valve for higher power or higher efficiency etc. Just some thoughts from some random dude struggling for sleep. Some say I’m good at physics and problem solving. Like if you want him to see and try. Edit: on second thought VVG seems unnecessarily complicated (which doesn’t subtract from the coolness). Just have a bypass intake and a Tesla valve intake and add a conventional valve to both so that you can adjust where how much of the intake air comes from. Yes, I‘m struggling for sleep, and yes it seems my inner engineer awakens when I‘m in this pitiful state. I just need stuff to think about. Have a good night everyone. Edit 2: It seems that editing your comment removes the „Integza loves your comment“. Makes sense but is kinda sad.

My suggestion to increase the airflow would be to put multiple valves in parallel - the same design as the one you already have - they would each have the same diodicity but would let more air in - good luck 👍

Mechanical Engineer here, not an expert in fluids but have you tried tapering the channels a bit near the intersections so that it creates a diffuser in one direction and a venturi in the other?

Due to the quick cycle time, the valve length should be one or at most two loops. Additional air flow can be achieved with adding more valves in parallel around the pulse jet. Good luck!

Since the conduit is a solid of rotation, the cross-sections are annuli; to generalize the results of the 2d model, you have to account for the change in cross-sectional area with radius

I think you should try an extrusion tesla valve vs the rotated one. Changing the volumes taking each path likely did some weird things to the fluid dynamics. It does look really interesting though.

Love your channel man! Much more interesting to watch someone testing hypotheses and problem solving on the fly, even if the gadget is flawed. Helps when you have a great sense of humor about it as well. Good luck in all your endeavors. I subbed.

Integza is learning to build rockets so he can fly all the tomatoes into orbit, making the world a better place.

I’m a firearm suppressor manufacturer and I would love to 3D print the design in metal and see how it works as a “silencer”

The first time I saw a Tesla valve I wondered how it could be made cylinderical and what the efficiency might be. So this video is really awesome to see. Bravo Integza!

Cool concept! I wonder if the 2d simulated diodicity / forward pressure drop changes by revolving it around an axis to make it 3d: The channels closer to the axis will be smaller than those further away, and, despite having arranged them in an alternating pattern, the lack of both axial and plane symmetricity will make half the cells behave differently than the other half!

The mustache is the ultimate judge of character .

It was pretty cool that the makers of the resin were willing to help you with your part.

i have just used this video as a source in coursework, i never expected this to be a thing it’s youtubers like you/this channel that got me into doing engineering this is so very surreal

@Integza This is awesome! I've been working on a 3D Tesla valve in my mind for a bit, so very nice to see a smart man like you working on this problem! Perhaps it IS a paradox? Good Luck and thanks for the videos!!!

I would either add a input where you can connect your compressor just for start or which is way more explosive and exciting use chemical starting slug with oxidiser. This solution was used for liquid rockets where hypergolic ignition was to slow.

The problem is your engine isn't going anywhere. Like the V1 you need the valve on the front. It also needs to be the same diameter if not larger than the combustion chamber, so it acts like a compressor. The geometry of the engine you are using is designed to block off air flow. The Tesla valve is doing that job now, so the geometric solution is holding it back.

Hi for your valve, the idea is to make as straight a path as possible at the inlet but for the return cut the air flow in two so that it meets at the end of the 'drop'.

Being late to the party, and only studying electrical engineering decades ago, I suspect several issues could improve the efficiency. 1. since the jet is suppose to propel a plane, a forward mounted air intake to take advantage of the in-flight ram pressure should help. 2. placing multiple Tesla values in parallel would reduce the intake air resistance. I don't have a clue how it would effect the back-flow resistance. At a fast enough speed, the engine may act as a ram jet. 3. a hybrid system with compressors to allow bypass could increase efficiency. 4. a better aerodynamic exhaust system. As a side note: if you have the processing power, setting up a genetic algorithm simulated annealing to optimize the engines parameters, since you have applications that can model performance, would be beneficial.

what if you had a "starting valve" to give a higher volume of air to start it and then it closes for running.

I was trying to imagine what a cylindrical Tesla valve would look like. You sir are a genius.

If you want to bend a metal pipe, pack it tight with sand, cap off the ends, and gently heat it up to bend. After that you can just remove the sand and you have a pipe with an even diameter to prevent bottlenecking.

I have studied pulse jets for over a year and read thousands of pages of research pdf files from various universities, Boeing, NASA Darpa and US dept of energy. I have built several unique designs but thru trial and error didnt suceed in getting one to sustain running indefinately without forced air or continous ignition. However one majical day i tried to start a small simple model and on the first attempt after turning on fuel first ( propane) the second i hit the hi voltage ignition box ( firing a spark plug) it roared to life for maybe 5 seconds without any forced air. I was elated as had over 5 design changes,countless hours working on it and testing it and getting it running. Once i figured out the secrete i built the second which is 5 times larger but it didnt take very long to get that one diald. It starts within seconds with just a touch if compressed air to initiate first deflag. I too use the focus wave cc closed on one end with intake and exhaust same direction near each other but intake about 1/3 from exhaust 2/3 to wall of cc. The secrete i realized was to 1 ) use,propane to start , get running. Then switch to fuels like méthanol or have both injectors. Use a spark plug and coil box ( used one from a torpedo style keresene / electric heater or oil burner furnace is easiest, put a swictch on it. I didnt put my injector down the intake like they say because i wanted unrestricted airflow. Use a steel 1/4 brakeline pinch off open end abd drill tiny holes on both sides as to disapate within cc. Place at right angle to cc right behind intake throat. .flare both intake and exhaust . Use the 4 to 1 quarter wave theory intake t End ( opening to cc back wall where u could place spark plug. I placed mine 1/ 3 ahead of wall 1/3 behind intake to cc spot and fuel injector. Use auto style compression fittiings to tightly connect fuel line. CC length to intake length good starting point with exhaust 1/2 to 1/3 dia of cc and as said b4 4times as long as intake to cc wall. The trick is to have the exhaust two seperate thin walled pipes one inside the other so u can vary the length quickly to find the sweet spot of harmonics. Get it running well fine tuning the exhaust lengths and can even rotate fuel injector as that plays a role in performance . Use a valve on the fuel line to adjust flow rate. Start off mellow until it is firing than crank it up while using air gun from air compressor slightly across intake mouth to start i turn fuel then spark then air. Keep air on for a few seconds while turning up fuel , slowy remove air ubtil its running then kill ignition. Your forced air valved type is my current work in progress. I am using a spring loaded check ball than closes tight against a cupped manifold in intake tract and threaded the spring for compression adjustability. Forced air. U need a large airbox enclosing intake so the air is higher pressure volume than exhaust atmosphere with adjustable waste gate or check valve . Hi velocity air is not what it wants. You can put a balloon over exhaut to keep propane from blowing out when starting and double or triple up to get higher internal cc pressure at first ignition cycle. I am doing all these and next is two tesla turbine ( both inside same unit , like a auto turb, one as a turbine to drive pump to force air thru system. And working on spiral ( rotating wave / vortex ) for higher compression. A modest intial compression of aur/ fuel will magnify thrust greatly. Putting it as high as turbine in efficiency ( fuel to thrust.) Good luck. I have many more ideas,and tests to perform. Hydrogen or water electroylosis fuel hho or really h2o2. Super sonic combustion ( detonation waves) but get a good welder first and use stainless,steel or at least steel not that crap. They run HOT. Like 3k degrees farenheit inside cc and part of ex

Put a second intake that you can close off once it’s running. But feed full blast to start?

Solves a problem. "ahhh finally im don..." New problem: "hi there!"

I believe that the shorter the air pulse through a Tesla valve the more efficient the diodicity is. So maybe you don't need extremely high steady-state diodicity to get enough out of it for your application. Also Messerschmitt had a concept of a valveless pulsejet-ramjet hybrid that at low or no speed, it uses the back of the ramjet shockcone and the cone sleeve to redirect the air to a backward facing intake like like the U-shaped pulsejets, but at high velocities (say Mach 0.5+) the ram pressure from the cone overcomes the pressure of the pulses and it starts to behave like a ramjet with continuous combustion.

Test the real heat exposure of the valve. Start the jet, load the valve, record the temperatures. Perhaps you can work with metal fins. Also, perhaps a rectangular valve will be easier to work with entirely.

Observation: Revolving the Tesla valve around the axis, forming a ring (as you've done), would simply result in one unsupported ring corresponding to the center of each loop and the outer loops would have a larger volume than the inner loops. You noticed this and, based on 9:33 (and the 3D model, which I just downloaded), it look like you've arranged 6 separate curved Tesla valves radially around the axis. Thoughts that spring to mind: You're occupying a lot of volume but the cross sectional area is still very small (the area of the ring-shaped duct where the fluids enter/exit). How does the flow compare to a hollow cylindrical tube with the same cross sectional entry/exit area? How does the flow compare to a hollow rectangular block with the valve extruded linearly with the same cross sectional entry/exit area? The outermost loops of your cylindrical design have a larger volume and cross sectional area than the inner loops. Would this cause the outer loops to have a lower pressure than the inner loops? Would the difference in pressure between the inner and outer loops interfere with the fluid dynamics? Your fuel gas will experience increasingly extreme oscillations of flow rate and pressure the further down the tube that it travels due to each loop acting as a stronger and stronger restriction to backflow. The sharpest spikes would be near the end. Does your simulation account for the pulsating pressure of the flame front when it tries to propagate backwards through the Tesla valve from the the combustion chamber? If not, then you may need a way to measure the pressure over time at various positions within the value since you can't actually see what's happening. You may need a Tesla valve where the loop geometry changes as it approaches the combustion chamber, rather than using the same loop geometry over and over.

Try adding a secondary intake bypassing the tesla valve just for starting it.

On the valve, you can build it in two pieces and screw it together. You can also build the baffles as separate individual pieces and run a screw/nail through it. If you make the baffle physically attached to the screw then mark the screw head, you can ensure the baffle is facing the correct way. The seam can either be sealed with adhesive or a flange can be implemented or both. This is only taking in gas and compressed air so you won't temperature control, merely something that can take the pressure. In this way you can make sure the path is clear without sacrificing your piece. You can also make the path adjustable width with an rack attachment.

indoor growing box for plants. Gives lighting and automatically monitors moisture level. It will water the plant as needed and deliver plant food weekly. This is helpful for these days of sheltering at home.

The PVA PLA idea might work with very watery fireplace cement instead of the rubbery sealant you used.

Howabout reaching out to Destin on Smarter Every Day? He’s good with rockets

This was awesome, so well done. And the animation at the beginning was brilliant, I had no idea of the specific reason he made that huge cannon. I mean I knew but you explained it better then I learned in school. Love this channel, but I also love tomato's 🍅 lol

There is a Tesla valve 22 caliber sound supresor; it has a streight Chanel through the center so the bulet passes through with no resistance but the sound is almost eliminated!

use fmincon optmizer in Matlab and optimize the width, with respect to desired pressure drop and diodicity

I would try a aerodynamic valve. Basically multiple cones in line with center opened for airflow. Like those conical fish traps but for air.

Fluidic diodes are one way valves without moving parts that have a greater pressure difference depending upon which side of the valve receives input. Diodicity is defined as the ratio of pressure drop for reverse and forward flow for the same flow rate. It depends upon the geometry, size, nozzle configuration and Reynolds number. Vortex diodes produce a throttling effect as a result of turbulence induced by the fluid flow. Flow from one side of the valve is relatively unimpeded in the axial direction while flow from the other side is introduced tangentially producing a vortex. The present model is a spherical representation of the normally discoid vortex valve and can be printed without internal supports.

Late to this, but I just wanted to let you know the Schwerer Gustav wasn't meant for shelling the UK, it was meant for French defenses and actually saw use against the USSR. Fleißiges Lieschen, Busy Lizzie, or the V3 cannon, was meant for the UK. It was based off of the German WW1 Paris Gun, which had a range of 130km. She was an absolute monstrosity, barrel of 130 meter in length using 32 (we think) sequential charges to accelerate the ludicrously large rounds up to around 935 m/s, we know that full scale prototypes could reliably hit targets 93km away (at least until the barrels burst). Thankfully only two 'half-length' (it was closer to third-length) units were actually completed, and they had been deployed in the Ardennes Offensive. Together they fired 183 rounds at Luxembourg before being either withdrawn or overrun (I've seen articles proclaiming both).

Perhaps you could extrude the valve profile helically (like threads on a screw), rather than just circularly around the main axis? Depending on the angle/dimensions you could have helical conduits.

Alternative title: Recreating Hitler's missile engine using a 3D printer

1:30 Schwerer Gustav was not used in the western front, it was used in the easter front to bombard sewastopol to hit england germany used a bunch of smaller caliber railway guns from 21cm to 28cm caliber the most well known was the 28cm K5 Leopold with a absolute maximum range of 160km using fin stabilized sub caliber projectiles

Hey, man. Huge fan. Love your videos, love your style, love your mustache. I was thinking about your request, and I think that the key may be to taper the Tesla valve so that it reduces by volume in the check direction. I am thinking that you could also alter the lobes so that they are turned more towards each other towards the check end to increase their diodicity. This will generate more turbulence in the flow direction (I picture the flow direction like a wave form that goes from a high frequency or zigzag to almost strait at the exit) that will easily dissipate by the time it reaches the nozzle end.

The cylindrical tesla valve: very good idea! You have one air inlet into your focused wave engine, right? But the tesla valve has too much restriction, right? What if you made a short manifold where you had three tesla valves in a tight group side-by-side, connected directly to that one inlet? Since it is one inlet, the airflow into the combustion chamber should still be the same as you wanted. Because you aren't increasing the size of any one tesla valve, your diodicity isn't changing either. You would just be running multiple tesla valves in parallel for more airflow. Assuming that your air compressor has enough volume to feed the three tesla valves during startup, it should work, right? EDIT: Another commenter says "That engine design uses the change of direction as a valve already he is really adding a second valve. He needs to make it a straight engine like the one on the V1.". Good point there. What about a straight pulsejet engine with multiple tesla valves in parallel. All you need is enough volume of air flow to get it started. Maybe a leaf blower with a trumpet on the end of the leaf blower nozzle would work better than air from an air compressor. Seems multiple tesla valves in parallel need volume mostly, not pressure so much.

Have 2 different air intakes. One for starting the engine, and another for idling.

Your videos are so interesting to learn physics concepts applied towards engines

Technically the Schwerer Gustav was made to destroy the French Maginot line, but the Germans took the shortcut and went through Belgium... again

1:37 As a german who knows the Real Sound, this Elephanty thing killed me xD

5:00 since you have the 3D printer available, don’t be shy to use 3D mindset instead of 2D mindset: right now you have only rotated the structure. Why not rotate the structure in spiral/helix form which corresponds better with the human vein structure and winds screws. If you use natural forms even more, you can add scales to inside walls of the shape.

So as the one comment mentioned earlier that usually the valves are facing the front for pulse jet engines so as to increase air flow during flight, consider that with this restriction that you have now installed it might only have a hard time at rest. Maybe consider using some form simulated air flow as to simulate flight. Perhaps a leaf blower would help give you the air flow you need if set up to the air valve. It’s pry a dumb idea but it’s what I came up with . Good luck to you and I look forward to seeing if you continue the project.

this valve casts mass and heat but also propulses forward if the fluid returns via a straight path, pumping will propel a car forward, engines in the back of cars are pushing fluid bac at weird angles and then back up straight they hold themselves back, rear drive shafts off the fron wheels will improve over a single shaft down the middle and split. rope drive shafter will outperform mettal ones

I've wanted to see two things for a long time: A cylindrical tesla valve, and a tesla valve applied to a pulsejet. And you did both in a single video! Bravo! Good luck on sorting out the issues you discovered!

I'm not really sure about the design of the engine itself, as you're using a valve in a valveless engine, which is designed to offer enough resistance to the backwards airflow by itself. So, by adding a valve to such a design, you're making it harder to start the engine (as you have a lot more resistance to the incoming airflow) and you might not see as much of an improvement as you would otherwise notice on a design made to operate with a valve. Anyway, I love your content, keep it up!

Fonix, ter o colin furze a comentar o teu video é ouro sobre azul, o teu canal só pode disparar para o milhão. Desejo muito sucesso, estás a fazer um trabalho exepcional.

wooaaww the first one to ever show a part failiure king you are bro keep up the good work from sweden

Have two inlet connections. One with a Tesla valve for standard running and another one that you can close with a butterfly valve (Or a plug), just for use in starting then engine.

Use Dyson's vortex patents. The same principal for keeping dust in the chamber will also work for keeping air in the combustion chamber for your engine.

Quick tip : to prevent wall collapse in tubes and pipes when you bend them, fill them with water and freeze them. The ice will crack and allow the pipe to bend, but still hold the walls of the pipe apart so it doesn't buckle.

A few ideas, so thinking that this should be a moving system and the moving air will 1. Add pressure into the chamber as well as resistance of back pressure and 2. valve to add additional back pressure. How about adding a duct fan as well as the tesla value. Not focusing on only the value for the single part but a value with even a 1.2 and a duct prop to offset both the incoming air and back pressure. This is because a real jet/ bomb would be moving at a high rate of speed off the launch. This may be the initial critical mass needed to super charge the system. Mocking up a real life via the duct fan and tesla valve.

A simple and interesting solution might be to replace the tesla valve with a reed valve and match the resonant frequency of the reed valve with the pulse jet resonant frequency. The resonant frequency of the pulse jet could be measured with a microphone and then the reed valve resonant frequency could be modeled as a simple cantilever beam and you could adjust the thickness of the reed valve to match the frequencies. Best of luck! Love the videos

"The V is for Vendetta." LOLMAO

That animation of the V1 pulse jet pressure wave looks pretty good

I think the thing causing resistance in the Tesla valve is the Bernoulli-effect on the entrance and exit of the bypass channels causing an underpressure there to slow down your fluid. Try decreasing dynamic pressure in your fluid by decreasing flow velocity. You can do this by adding even more tesla valves in parallel to make a tesla injector plate. Additionally, you could try adding injector nozzles in the bypass channels pointing to the desired direction of your flow, to counteract the underpressure.

I'm no engineer but the solution looks obvious to me, just add more valves in parallel

I signed up for SkillSwear and dont regret it. Your animation skills have improved, and this viddy was solid. Looks like i'm shipping you those tacos after all. Do you prefer spicy or not spicy? :P

With Tesla Valves specifically, there was a later design that tapered the side chambers. By doing this you are forcing the fluid through a tighter gap on the sides. Basically making it go faster. In doing so this creates a whirlpool effect in the main channel. This allowed for greater flow through the primary channel and more resistance in reverse.

Ok, so this one is really out there, and probably has quite a few flaws, but it seems like it could work really well. What if you were to make one singular cell that wrapped around a straight tube in a spiral fashion. You could then support the middle wedge piece by connecting it to the main structure with a thin rib, effectively splitting the cell into 2 pieces, although there are probably better ways to hold the middle wedge in place. You could also alternate how far out into the middle chamber the wedge goes, which could possibly make a vorticity that could slow it down even more. I think this would have the advantage of having a lower forward pressure drop as the middle chamber would be a simple straight bit, as well as looking super cool, and possibly making some vortices that could slow down the flow in the reverse direction even more.

This guy takes things to the nth degree. I bet he can't help himself. Respect

My suggestion would be to use a shape other than the tear drop. Perhaps use two isosceles triangles with their bases together. Make one base much wider than the other so as to make any fluid going the wrong direction slam into the wider base. Another modification you could make to this design would be to wrap the corners of the larger triangle inward so as to reroute the flow of the wrong direction onto itself. This will make the fluid push itself backwards while also helping to increase the flow in the other direction by removing any sharp turns.

Put an intake port that you can close that will support your compressor infront of the tesla valve. Just drill a hole insert your blower tube maybe extended and weld it in place. Just disconnect the blower. If you extend the blower tube say maybe 3 ft. The heat will bleed off not damaging the blower. Your welcome. My name is Edward by the way.. Edward Rainey. Alabama USA. LOVE YOUR CHANNEL

Another good video, thanks for making these.

You could rent a scuba tank from your local dive shop for about $15 or less. They are usually charged to 3,000psi and you could use this for testing before you buy a more expensive compressor

Very interesting. Maybe using several valves with high diodicity in parallel could reduce the forward pressure drop while keeping a good valve effect...

Also for a stop gap solution use a stronger compressor, it won't fix the problem permanently but it could shed more light on where key flaws in different designs are, if 'x' part of the valve breaks when subjected to load in the direction of smoothes flow then that is a point that needs to be redesigned as it is causing the most drag, when it should be providing the least.

Great videos what i was looking for..subbed

MSc. In fluid mechanics here. (not trying to brag though!) So the question is: how to efficiently drop pressure much more in on direction than the other? I would try to design a solid parachute within a duct. The parachute has a rough drag coefficient of 1.75 on one side, and about 0.3 on the other. Potentially, as drag coefficient is proportional to pressure, that could give a diodicity of up to 8. That will strongly depend on a lot of factors though. That's a long shot, but I would be glad to contribute to that if you would like to! Cheers Arnaud

Thank you for doing a 3D Tesla valve! I have had this as a question for a few years now. Also, I read a university research paper some time ago that stated the Tesla valve gains its best efficiency ~ 11 or 12 cells. This research was based on Tesla's original design. That may be a starting point in your newer design. Another thought, try making the valve bigger.

Your bench setup is a static air pressure intake. If the whole setup were to get into speeds with compressible flow. The dynamics will change significantly with intake nozzle shape/throat size. Stoichiometric ratios (fuel heat value) and Reynolds numbers (laminar vs turbulent flows over distance along each nozzle). Also a single size set of say six valves may be better served with a golden ratio increase in size of each valve in the series progression. Just like a rocket nozzle is designed for the maximum thrust at the speed and altitude (atmospheric pressure) of maximum dynamic loading.

If you spray a lot of acrylic paint on the inside of your 3d printed mold you might be able to detach it from the sealant without damaging it. Also, you will need some sort of pressure injection to make sure that the viscous material makes its way into every nook and cranny.

one suggestion for decreasing the forward pressure drop whilst maintaining the diosticity of the part could be to elongate the loops so that the return angle is more acute to the onward line... this is already not being explained well... ok at 4:40 in the vid there is a image of the valve design, from left to right will be the high resist path and right to left will be the low resist path, if you make the angles for the low resist path straighter so that the air does not have to change direction as much you can increase the flow and reduce pressure drop, to counteract this on the high resist path you could elongate the loops so that the angle at wich the airflow rejoins the main path from the loop will be much more acute and more likely to cause turbulence and increase resistance to it. also a possibility could be to narrow the loop as it goes round so that the exit for the high resist path (the bit above the number 2 in the diagram) would be narrower, increasing the flow speed at that point and (hopefully) adding a slight venturi effect into the mix, increasing the resistance further.

If you just need the extra pressure to start the engine perhaps you could make a second inlet that you seal after starting the engine

Interesting concept, keep it up mate !

The Schwerer Gustav was designed to bombard the Maginot line, it was never intended to be used to bombard Britain. It didn't leave the factory in time for the invasion of France though and so was only used for a few offences in the eastern front. Germany did attempt to build a multi stage cannon for bombarding London, commonly called the "V3", but it never got operational. And the "V" in "V1", "V2" and "V3" stands for "vergeltung" or "response in kind" roughly translated.

If the issue is in startup, maybe add a bypass valve that is completely sealed off except when manually actuated. If it has issues running after being started, then you’ll need the bigger valve like you stated. I see colin furze has replied, and he has good points (go figure! Haha) and maybe the small gains can mean a lot. but like you said yourself, this is the scientific process! Good work!

Don't disrespect Charlie Chaplin's mustache, Intereza.

There is a lot of space in that valve design that is unused. Rather than a radial extrusion, you would probably want to look at something akin to an interpolation - creating a mesh or lattice of shapes which form an effective tesla valve. You could also look at tapered geometries so that your intake section is wider. The first three stages are some of the most critical in preventing reverse flow and having this more narrow than the intake effectively increases the forward pressure and decreases the pressure exerted by the combustion.

Your solution to everything is the 3D printer. Honestly 20/10

Ah yes, stealing Edison's quote for Tesla's design. Well played

Look up pulse jet augmentation. Adding augmenters to the intake and exhaust valves will help greatly. Also, gas doesn't have the energy density of kerosene or diesel. Try upgrading to liquid fuel if you want some thrust! Cheers!

Great content! Impressive animation too

You could kinda make the 3D tesla valve like just a bunch of 2D tesla valves put together to a circle by inserting length-wise walls into the 3D channel. This would prevent the flows from searching their own lowest-resistance channels in the crossings and force them to collide to make the maximum resistance.