"you know exactly where I'm going"? No. I have no idea. This was a randomly suggested video on TH-cam. I have no idea what you're talking about but the colors look nice
@@fRiX15 Look at the color bar below that header, it shows what each color means as well as the current max velocity. By the way, the units are mm/second.
@@SimonPL-82 fr I was afraid to say anything cause usually when I criticize goofy music, there's suddenly an army of angry folks saying "that's a classic."
Lol. The thing that's crazy to me, is how the shoulder fired rockets have negated much of tank armor benefit at a fraction of the cost of a tank, in the same way powerful bows and early firearms negated the value of knights in plate armor. History may not repeat its self but it rymes a lot -William shakespear, probably.
Imagine how much time and resources this development process would take in 1952 when they had no computer simulation P.S. I wonder how much penetration that would have
They mathematically modeled the wave fronts using analytic formulas and had various high speed camera, albeit with film. Analytical modeling is how von Neumann came up with a solution for the Pu core compression problem.
@@juliane__ and they were hand selected extremely smart, very math savvy people with near unlimited resources, i.e. people, to do the number crunching once the math was established.
@@colemiller2149 sometimes a smaller hole, shockwave, molten metal, and metal fumes are all you need to **incapacitate** everyone in an enclosed armoured vehicle
Keep in mind, these designs rely on Overdriven Detonation with layered explosives. Instead of pure HMX, the warhead would be filled with a core of Comp-B for example, with a thin outside layer of HMX or RDX. The RDX/HMX layer is initiated first, which shocks and compresses the Comp-B, putting its detonation velocity well over 10km/s. Jet velocity can very well be above 20km/s.
Can you share more or any sources? My understanding was that overdriven detonation was very short acting. I have seen a sentence or two in various papers about nitromethane compressed then detonated via a starting charge to it but never the results you mentioned. Would love to learn more!!
"Fast Jets from collapsing cylinders" is the title of the paper, the images appear to be from a streak camera, which probably used a spinning mirror to scan a thin line of the image rapidly across a piece of film.
@@jimmcneal5292 its also about cost, could you make an incredibly complex HEAT round that could achieve that level of precision? sure, but its probably more sensitive to handling and damage while in storage and the associated cost of both of those things.
@@solus48Not to mention you have to be able to produce a million of these things per year as they are consumable items so the design has to be simple and cheap.
one huge factor to consider with this cylindrical shaped charge is ease of manufacturing. some of these designs boast higher jet velocity, but timing secondary charges like that would require the kind of precision seen in nuclear weapons. having the most advanced weapons in the world means nothing if you cannot produce a large quantity and get it to the front lines
I think you will find that precision timing electronics have gotten smaller since 1945. I have been recently working with a 16GHz clock/timer that costs less than $1 per piece. No joke. (RC delay ring architecture)
I am an explosives fabricator specializing in custom linear shaped charges for aerospace applications, and I would absolutely freaking LOVE to be in on this kinda R&D!
@@razerbrosdynamics3917 Shaped charges don't last very long in the atmosphere. They cool down from their plasticized state and quickly lose speed due to drag. Shaped charges have existed since the 1930s. If they were useful for railguns, they would exist by now.
To achieve ring detonation from usual point detonator, try placing hollow/inert round dosc-like "lens" between point of detonation and cone tip of usual cone-shaped charge. That's one of main directions military shaped charges progress nowadays -- optimizing materials and shape of "lens"/explosive.
keep in mind that using a liner like beryllium can make the velocity of your jet increase because it's a much lighter atom, so it needs less kinectic energy to achieve the same velocity as a heavier atom like copper, so even though it is faster it doesn't necessarily have more kinectic energy, you should check that out because what you really want if the goal is to penetrate as much armour as possible is kinectic energy.
I was thinking along those lines - you want something that ablates easily but has high enough density to stay in liquid phase. NIF has done some experimentation in the fusion ignition space and copper doped beryllium seems like a good option here. just sayin'
my thought is I have no idea wtf I just witnessed, but what I definitely *did* see was great dedication to experimentation, adaptive modification and the scientific method. Keep up the good work!
@@jwstolk It's 100%. Computer chips turn every last joule into heat like a big resistive load. They just happen to use it to flip some transistor gates on its way through.
Hello, and thanks for a great video! Long time ago, I've seen a research paper about novel shaped charges. I don't think I can find it, and I'm sure it even exists in open acess (through if it does I'll post a link). But the design they ended up with, which has supposedly shown 20-50% higher practical penetration values, was as follows (also, english isn't my first language, so forgive me): A regular, non inverted shaped charge cone. Except the walls look "crincled". Cone consists of a small number (6-8) of wall "segments", each of them is a linear shaped charge. Upon detonation, jets from them converge. From top down point of view, the cone looks like a star, and from the side like a cone. Not sure if it's possible to simulate it in 2d, but anyway, thought you might find it interesting.
@@jozefcyran2589 Nukes don't explode. They heat up the air so much that it explodes into plasma. Containing a nuke is really a matter of containing all that heat and radiation, which is surprisingly very simple (a specific alloy whose name I have forgotten). It's the same tech used on Project Orion, only weaponized. I advise you read the ToughSF blog to get better information, since it's really interesting and has some very funny numbers.
Some of the last designs seem almost like a modernized variant of something like the Panzerfaust, where in the shape was fully utilized instead of merely just the cone in the back of the design. All the same, good video to watch and enjoyable to learn from o7
Thanks for sharing. I was thinking about shaped charge's and Molten copper just the other day weirdly enough. It's really neat being able to simulate this on a computer, Can you imagine having to physically make and test every design idea back in the day.
If you lined it with Lithium Deuteride/Tritide and collided it with a jet in the opposite direction it may well have enough energy to trigger a fusion reaction. I have no idea of how much of a reaction but those speed may be sufficuent to overcome the Coulomb barrier for Deuterium and very likely for Tritium. It would be fun to do some experiments.
I think that when trying to get those high speeds the geometry of the warhead, machining and powder consistency must be very precise, otherwise the charge will explode sideways and the jet will not form, as just small deviations will cause what in my field we would call a standing wave. That's probably why they are not used that much.
The mass of a cylindrical charge is higher than a conical charge, reducing range and velocity which are key contributors to combat effectiveness. It makes sense they shaved off as much mass as they could lending us the current conical charges we typically see. Limpet mines that are placed were conical iirc though since they didnt need low mass to be effective.
This idea is around for quite some time afaik, but the issue was always to achieve the stability and symmetry of detonation and jet forming, as this is extremely sensitive to any irregularities. There were some interesting ideas like to shoot the high velocity jet thru a coil since it was supposed to be highly ionized and use this as EMP generator. But I am not aware that anyone has succeeded in practical implementation of this shaped charge geometry yet. Nevertheless I like your creative approach to the concept, perhaps it can be realized at some point.
The jet is microscopic, it ain't going to damage anything. The beyond-armour effect need to be big enough for the thing to be worth the shot quite literally.
Someone else mentioned lenses. Seen plastic one near the base in rpg diagrams. It has to be a significant improvement to remove about a fifth of the warhead's payload.
the standard in shape charges is copper and a 60degree inverted cone.....now in a previous life I have "heard" but can neither confirm nor deny that the bottom of a Gatoraid bottle and around 1/3lb of C4 with a center detonator will punch through a manhole cover if the stand-off distance is correct...
Even tho the jet might be very tiny in size and have low mass... At those speeds it will pretty much go straight trough anything i guess. And some MAD dedication you put into this! Really cool stuff!
3 short pipe based cylinders that fire isometricly up into a larger shaping chamber to impart rotational spin into the spike. Copper based kinetic drill bit.
Never thought you would use DEAF KEV Invincible, but it is a welcome choice nonetheless. Edit September 17, 2024: Bruh you changed the background music
Wires of just the right length to delay the signal from the controller to the explosives? So the main detonator sending the signal sends all the signals at the same time, but the length of the wire delays one set of signals by just enough. IIRC, there was one Russian radar system that needed a tenth of a millisecond delay from one circuit to another circuit right next to it. So the Russian system had ten feet of wire to delay the signal by just enough.
@@ThermalWorld_ The problem is that detonators have variation in the time they take to go off. Nuclear weapons have similar problems (needing to initiate detonation in multiple points at different specific times) and they usually solve it by having just two detonators (could do one but then it would be easy for it to go off accidentally and produce a full nuke yield) and connect the detonators to the various points through channels of explosive with a very well known velocity of detonation. There are even papers (unclassified) about how you can make logic gates out of channels of explosive.
Suggestion: for your simulation recordings, make a big ol' number in the corner counting the highest speed observed up to that point in the simulation, and gate the readout so it only considers the main jet and doesn't register any values from detonation fronts, backward jets, enclosed jets, etc. Make the number freeze for long enough that we can digest it before moving on to the next sim. Your current sims are interesting, but 1) not everyone understood to look at the little bold number in the upper left, nor how to read scientific notation; 2) the little bold number is constantly bouncing around all over the place so it's hard to tell when it reaches its maximum; 3) the maximum will always be during the interesting part of the sim, so your attention is diverted away; 4) the maximum is potentially contaminated with values coming from other parts of the system than the main jet as it just naively uses the entire simulation image, so could conceivably not reflect the speed of the jet, which is what we're interested in; 5) you switched between m/s and mm/s several times during your simulations, so it was confusing why the number was so much lower for your "ultimate" design.
I got to experience the wrong end of a shaped charge in combat. Missed me but, made a hole through a lot of armor. I did some research after, and 8000 m/s seems to be what I remember finding for the penetrator for the PG 7V that hit our vehicle. That information is a lot harder to find out now for some reason. No more cross sections, high speed x-ray photography, etc.
There are probably a lot of solutions in here that are correct, but unstable. The smallest changes with machining, explosive packing, and detonation may not produce an actual jet. If I drop a quarter edge down, how many times does it actually land on the edge- very few if any out of thousands of attempts. Very cool video. I've always wanted to see a simulation of a shaped charge- fascinating stuff
@@squidwardfromua You really couldn't, best you could do is fit like 8 or more blasting caps around the ring, but achieving a perfect spherical Detonation is very difficult unless the explosive is Laser or Electrically Initiated an has a small mass.
interesting work! it seems like there are some step change gains possible for shaped charges just from cunning geometry and timing... cool area of research
Implies a perfect HE wih no real world imperfections. IRL there are always higher and lower pressures, which distort the ideal wavefront, what makes these ultra high performance shaped charges nearly impossible.
Of course. But you always start an engineering simulation with ideal models and conditions. After than you add in nonidealities to see if it matches expected and empirical test results. You NEVER believe an engineering simulation is truth - that's a sign of incompetent engineer!
The model enforced symmetry is giving the illusion that some very unstable results work, and I suspect that a too simple material model is not correctly dealing with sound speed.
reminding me of the fact the us navy during the 1950s was fucking about with aluminum shaped charge warheads, ranging in size of i think 2 inches all the way up to 16in, fun times back then
This can be posed as an optimization problem where you start with some shape, then allow the shape to vary to maximize the velocity and/or other parameters.
It's wild how what used to be an expensive and dangerous test can now be repeated time and time again, at a negligible cost, with such minor alterations as a single degree of the cone angle...
Thin the design toward the end, and slightly bulk it up in the back. It looks like the energy is reduced a bit as it is overcome by the charge around it in the end. With thinning sides toward the front, it would seem that as the energy progresses from the initiation point, it will be focused and forced out with less reduction. Just a guess.
"you know exactly where I'm going"? No. I have no idea. This was a randomly suggested video on TH-cam. I have no idea what you're talking about but the colors look nice
So right, I still haven't understood where he got the speed from, I can just find unit: m/s but not how many
@@fRiX15 Look at the color bar below that header, it shows what each color means as well as the current max velocity. By the way, the units are mm/second.
The color is the speed
I understood some of the words
@@OneGlassNail thanks
The Department of Defense will be calling soon. They want to chat about something.
Probably about that f**cked up music.
Notice how the shape is the standard shape of an rpg
@@raptor_909 in an RPG the front of the cone is hollow, leaving just the standard rear cone.
@@SimonPL-82 fr I was afraid to say anything cause usually when I criticize goofy music, there's suddenly an army of angry folks saying "that's a classic."
Lol. The thing that's crazy to me, is how the shoulder fired rockets have negated much of tank armor benefit at a fraction of the cost of a tank, in the same way powerful bows and early firearms negated the value of knights in plate armor. History may not repeat its self but it rymes a lot -William shakespear, probably.
Imagine how much time and resources this development process would take in 1952 when they had no computer simulation
P.S. I wonder how much penetration that would have
They just went trial and error on the field and deduct from results.
Bet it was a lot of fun
They mathematically modeled the wave fronts using analytic formulas and had various high speed camera, albeit with film. Analytical modeling is how von Neumann came up with a solution for the Pu core compression problem.
They looked into their books from the 30ies...
@@juliane__ and they were hand selected extremely smart, very math savvy people with near unlimited resources, i.e. people, to do the number crunching once the math was established.
It remains to be seen how many meters of homogeneous armor this explosion penetrates.
*kilometers
It would also rely on how much mass is expelled. Ideally you want the most lining/metal jet as possible as fast as possible.
according to a calculator i found, 10 meters, assuming it has 10 cc of berylium.
Stop pretending to be smart just because you played War Thunder once.
@@murmenaattori6why are you being so needlessly aggressive?
a 131km/s shaped charge sounds pretty scary
If the mass is too small then sure it'll still penetrate anything, but not as deeply or with a smaller hole
@@colemiller2149 sometimes a smaller hole, shockwave, molten metal, and metal fumes are all you need to **incapacitate** everyone in an enclosed armoured vehicle
Just build it 👌
To be fair, anything measured in km/s is pretty scary
Build it and they (atf) will come @@WetDoggo
The TH-cam tutorial music hits different when the background is conseptual high power HEAT warhead penetration tests
Keep in mind, these designs rely on Overdriven Detonation with layered explosives. Instead of pure HMX, the warhead would be filled with a core of Comp-B for example, with a thin outside layer of HMX or RDX. The RDX/HMX layer is initiated first, which shocks and compresses the Comp-B, putting its detonation velocity well over 10km/s. Jet velocity can very well be above 20km/s.
Can you share more or any sources? My understanding was that overdriven detonation was very short acting.
I have seen a sentence or two in various papers about nitromethane compressed then detonated via a starting charge to it but never the results you mentioned. Would love to learn more!!
Fascinating
i mean the last simulation readout says 131km/s
@@M4xXxIkInGYeah, I watched the video too, but I was talking about real life test results. My point was, this technology works.
Gibe source or u lie@@Steve-mr5un
90km/s, casual 11 obrital speeds at sea level 😅
Wait, how were they measuring the speed of the jet in the 1950's?
Shutter speed of a camera
High speed photography, open aperture with electrical lighting pulsing at fixed interval based on cycling of AC current.
one way I know is using a very fast spinning mirror and reflect images to multiple high speed cameras
@@kekw9716between you and me, we've just described the two ways to make a stroboscope
"Fast Jets from collapsing cylinders" is the title of the paper, the images appear to be from a streak camera, which probably used a spinning mirror to scan a thin line of the image rapidly across a piece of film.
The problem with translating this into the real world is having a mechanism that will trigger the detonations reliably at exactly the right timing.
Works in nuclear weapons
What about tandem charges?
@@jimmcneal5292 its also about cost, could you make an incredibly complex HEAT round that could achieve that level of precision? sure, but its probably more sensitive to handling and damage while in storage and the associated cost of both of those things.
@@solus48Not to mention you have to be able to produce a million of these things per year as they are consumable items so the design has to be simple and cheap.
@@solus48So like, tandem charges?
one huge factor to consider with this cylindrical shaped charge is ease of manufacturing. some of these designs boast higher jet velocity, but timing secondary charges like that would require the kind of precision seen in nuclear weapons.
having the most advanced weapons in the world means nothing if you cannot produce a large quantity and get it to the front lines
I think you will find that precision timing electronics have gotten smaller since 1945. I have been recently working with a 16GHz clock/timer that costs less than $1 per piece. No joke. (RC delay ring architecture)
Such precision would necessitate factoring signal propagation time
Remember guys he’s NOT suicidal and if anything happens to him I blame “big tank”
Don't worry, "big anti-tank" will keep him safe. However, he probably won't get to see the light of day for a while...
@@coltpiecemakerluckily, designing countermeasures to your weapons simulations pays pretty good: you get to not die.
Casual weapon simulation when drinking coffee in the morning. I love it.
I mean, I think good part of shaped charges are used for engineering/mining/other civilian stuff.
Legends have it the jet is still penetrating additional meters of homogeneous armor to this very day.
I am an explosives fabricator specializing in custom linear shaped charges for aerospace applications, and I would absolutely freaking LOVE to be in on this kinda R&D!
I do manufacturing scale-up of nanomaterials, and I would too my dude
Fascinating! It really has me thinking about potential applications.
I am a huge fan of your work, Cody!
3 words
Human
Mantis
Shrimp
It was written there 131.67 Kilometers per second, what have you done? Are you trying to create a big bang?
That's 0.043% light speed!
@@kahlzun We have a good railgun design in the making here
@@razerbrosdynamics3917 Shaped charges don't last very long in the atmosphere. They cool down from their plasticized state and quickly lose speed due to drag. Shaped charges have existed since the 1930s. If they were useful for railguns, they would exist by now.
@@DoggosGames theyve been around since the early 1900s in industrial applications with the effect being discovered in the 1890s iirc.
@@DoggosGames okay so we just move the atmosphere right before the shot
Can you test it against armor with conventional shape charge side to side
That's incredible.
I would've never thought that inverted shaped charges would work
To achieve ring detonation from usual point detonator, try placing hollow/inert round dosc-like "lens" between point of detonation and cone tip of usual cone-shaped charge. That's one of main directions military shaped charges progress nowadays -- optimizing materials and shape of "lens"/explosive.
You can see a plastic lens in some rpg cut-away diagrams.
keep in mind that using a liner like beryllium can make the velocity of your jet increase because it's a much lighter atom, so it needs less kinectic energy to achieve the same velocity as a heavier atom like copper, so even though it is faster it doesn't necessarily have more kinectic energy, you should check that out because what you really want if the goal is to penetrate as much armour as possible is kinectic energy.
I was thinking along those lines - you want something that ablates easily but has high enough density to stay in liquid phase. NIF has done some experimentation in the fusion ignition space and copper doped beryllium seems like a good option here. just sayin'
my thought is I have no idea wtf I just witnessed, but what I definitely *did* see was great dedication to experimentation, adaptive modification and the scientific method. Keep up the good work!
1:11 what material did you test the penetration on?
"you known exactly where im going"
yes, and it was super satisfying !
Holy shit, sufficiently big shaped charge of that type would be able to snipe things in orbit...
Dare: real mango made out of metal with a speed of a soviet mango apfsd shell (or american i dont remember) vs modern bradly side armour
It will pen a real mango out of steel is like a 50-60 mm shell
No the mango made out of metal going the same speed of soviet mango apfsd against modern bradly side armour @@qumit165
@qumit165 Hypersonic 10kg ball of metal vs ifv = One very dead bradley
@@contemptordreadnoughtrealistically, it would lose velocity very fast
@@neurofiedyamato8763 Read the original comment
We need more of that boiz.
Dude, do you own a nasa pc? That was like 20 simulations
I think these are 2D simulations
@@rayhill1 lmao the corner actually tells the date, we see from 10/2023 to 3/2024 lol
@@qumit165 that's pretty cool, didn't even notice that. Some dedication here.
@@qumit165 It's a pretty efficient way to heat a home, about 99.999% of the energy used in the calculation is converted into heat.
@@jwstolk It's 100%. Computer chips turn every last joule into heat like a big resistive load. They just happen to use it to flip some transistor gates on its way through.
Hello, and thanks for a great video! Long time ago, I've seen a research paper about novel shaped charges. I don't think I can find it, and I'm sure it even exists in open acess (through if it does I'll post a link). But the design they ended up with, which has supposedly shown 20-50% higher practical penetration values, was as follows (also, english isn't my first language, so forgive me):
A regular, non inverted shaped charge cone. Except the walls look "crincled". Cone consists of a small number (6-8) of wall "segments", each of them is a linear shaped charge. Upon detonation, jets from them converge. From top down point of view, the cone looks like a star, and from the side like a cone.
Not sure if it's possible to simulate it in 2d, but anyway, thought you might find it interesting.
Yooo dude the amount of reserch and simulations is crazy, keep it up. Thanks for the effort.
The fastest *chemical* shaped charge. Casaba Howitzers and nuclear shaped charges would like to have a word with you.
Were there nuclear shaped charges? Wouldn't the explosion destroy the charge so that shaped charge wouldn't occur?
@@jozefcyran2589 Nukes don't explode. They heat up the air so much that it explodes into plasma. Containing a nuke is really a matter of containing all that heat and radiation, which is surprisingly very simple (a specific alloy whose name I have forgotten). It's the same tech used on Project Orion, only weaponized. I advise you read the ToughSF blog to get better information, since it's really interesting and has some very funny numbers.
I really wanna see a military ordnance lab try that last design. If the solver can't handle it, you KNOW it must be good.
This brought the game of Pool to mind, angles and playing off of bumpers and other balls.
thank the algorithm, this is the kind of video that i can use for fresh CAD inspiration.
Some of the last designs seem almost like a modernized variant of something like the Panzerfaust, where in the shape was fully utilized instead of merely just the cone in the back of the design.
All the same, good video to watch and enjoyable to learn from o7
Aye, that last thing really like Panzerfaust. I hope it can pen 115 mm RHA steel.
Thanks for sharing. I was thinking about shaped charge's and Molten copper just the other day weirdly enough. It's really neat being able to simulate this on a computer, Can you imagine having to physically make and test every design idea back in the day.
If you lined it with Lithium Deuteride/Tritide and collided it with a jet in the opposite direction it may well have enough energy to trigger a fusion reaction.
I have no idea of how much of a reaction but those speed may be sufficuent to overcome the Coulomb barrier for Deuterium and very likely for Tritium. It would be fun to do some experiments.
And at the end of the day, a simple copper and high explosive burrito still works the best.
this is a crazy amount of work, very interesting subject, thank you
Video: DARPA
Music: Jeans commercial.
I love the cheery, backyard barbecue garage band music accompanying simulations of lethal weaponry. I get it.
Sometimes I wonder why youtube suggests me this at 3am. Then I realize the easiest way to stop opposition is to lead it
“You know exactly where I’m going”
Is he gonna do the 58 degree duel detonation?
Omg yes I knew it.
I can honestly say that I wasn't surprised.
Edit: but not because I knew what to expect
this man created the schematics for a new HEAT-FS round with all that experimenting
Congrats you've invented the panzerfaust
When you really hate the guy on the other side of your RPG
Well, being close to a shaped charge from any direction when it goes off is a BAD thing. It doesn't go off inside the launcher.
I think that when trying to get those high speeds the geometry of the warhead, machining and powder consistency must be very precise, otherwise the charge will explode sideways and the jet will not form, as just small deviations will cause what in my field we would call a standing wave. That's probably why they are not used that much.
Random suggestion from TH-cam but it was an awesome one.
Good work 👏🏻
The mass of a cylindrical charge is higher than a conical charge, reducing range and velocity which are key contributors to combat effectiveness. It makes sense they shaved off as much mass as they could lending us the current conical charges we typically see. Limpet mines that are placed were conical iirc though since they didnt need low mass to be effective.
I'd be curious of what the geometry might look like to get that conventional conic shape charge "implosion" to work from a single point of initiation.
So in other words, you discovered exactly the shape that we already have
Oh boy I love the funky sim channel, always a good thing to see the recommendations
The forbidden anti-satellite backyard gun.
2:00 was perfect. Like a drop of water bouncing in a still puddle.
This idea is around for quite some time afaik, but the issue was always to achieve the stability and symmetry of detonation and jet forming, as this is extremely sensitive to any irregularities. There were some interesting ideas like to shoot the high velocity jet thru a coil since it was supposed to be highly ionized and use this as EMP generator. But I am not aware that anyone has succeeded in practical implementation of this shaped charge geometry yet. Nevertheless I like your creative approach to the concept, perhaps it can be realized at some point.
The jet is microscopic, it ain't going to damage anything. The beyond-armour effect need to be big enough for the thing to be worth the shot quite literally.
Excellent video with lovely music
All the simulations and the best one is just an rpg shaped charge.
Well it did take the longest an average shaped charge sim can be from 20-40h
Someone else mentioned lenses. Seen plastic one near the base in rpg diagrams. It has to be a significant improvement to remove about a fifth of the warhead's payload.
I really wanna see some pen test with this stuff.
the standard in shape charges is copper and a 60degree inverted cone.....now in a previous life I have "heard" but can neither confirm nor deny that the bottom of a Gatoraid bottle and around 1/3lb of C4 with a center detonator will punch through a manhole cover if the stand-off distance is correct...
Even tho the jet might be very tiny in size and have low mass... At those speeds it will pretty much go straight trough anything i guess.
And some MAD dedication you put into this! Really cool stuff!
Well I think you’ve cleared that up nicely.
3 short pipe based cylinders that fire isometricly up into a larger shaping chamber to impart rotational spin into the spike. Copper based kinetic drill bit.
My guess is final solution very similar to rocket nozzle
Holy crap, great video! I love shaped charges
Never thought you would use DEAF KEV Invincible, but it is a welcome choice nonetheless.
Edit September 17, 2024: Bruh you changed the background music
This is how I will be opening stuck jars of pickles and stuff
Not sure how I got here, but I loved it.
Interesting design, although I think It would be tricky to detonate the second explosion wave at just the right time
Wires of just the right length to delay the signal from the controller to the explosives? So the main detonator sending the signal sends all the signals at the same time, but the length of the wire delays one set of signals by just enough.
IIRC, there was one Russian radar system that needed a tenth of a millisecond delay from one circuit to another circuit right next to it. So the Russian system had ten feet of wire to delay the signal by just enough.
@@toddkes5890exactly.. lol even simple CPU can delay those perfectly..
@@ThermalWorld_ The problem is that detonators have variation in the time they take to go off. Nuclear weapons have similar problems (needing to initiate detonation in multiple points at different specific times) and they usually solve it by having just two detonators (could do one but then it would be easy for it to go off accidentally and produce a full nuke yield) and connect the detonators to the various points through channels of explosive with a very well known velocity of detonation. There are even papers (unclassified) about how you can make logic gates out of channels of explosive.
Right on. Thanks for sharing.
Suggestion: for your simulation recordings, make a big ol' number in the corner counting the highest speed observed up to that point in the simulation, and gate the readout so it only considers the main jet and doesn't register any values from detonation fronts, backward jets, enclosed jets, etc. Make the number freeze for long enough that we can digest it before moving on to the next sim.
Your current sims are interesting, but 1) not everyone understood to look at the little bold number in the upper left, nor how to read scientific notation; 2) the little bold number is constantly bouncing around all over the place so it's hard to tell when it reaches its maximum; 3) the maximum will always be during the interesting part of the sim, so your attention is diverted away; 4) the maximum is potentially contaminated with values coming from other parts of the system than the main jet as it just naively uses the entire simulation image, so could conceivably not reflect the speed of the jet, which is what we're interested in; 5) you switched between m/s and mm/s several times during your simulations, so it was confusing why the number was so much lower for your "ultimate" design.
this shit can even penetrate challenger 3’s turret cheek
Going to test these real quick
Well, I finally understand how finnicky the conventional charge of an atom bomb is.
I swear to god Mr NSA, the algorithm brought me here! Please don't put me on another list.
I got to experience the wrong end of a shaped charge in combat. Missed me but, made a hole through a lot of armor. I did some research after, and 8000 m/s seems to be what I remember finding for the penetrator for the PG 7V that hit our vehicle. That information is a lot harder to find out now for some reason. No more cross sections, high speed x-ray photography, etc.
WE NEED MORE OF THIS (penetration test and more)
There are probably a lot of solutions in here that are correct, but unstable. The smallest changes with machining, explosive packing, and detonation may not produce an actual jet. If I drop a quarter edge down, how many times does it actually land on the edge- very few if any out of thousands of attempts.
Very cool video. I've always wanted to see a simulation of a shaped charge- fascinating stuff
In the last test are those 3 or 5 detonations? Is it 2d or really 3d?
2 detonations, 1 in a ring, one at the back
How do you even detonate the whole ring simultaneously irl?
@@squidwardfromua You really couldn't, best you could do is fit like 8 or more blasting caps around the ring, but achieving a perfect spherical Detonation is very difficult unless the explosive is Laser or Electrically Initiated an has a small mass.
interesting work! it seems like there are some step change gains possible for shaped charges just from cunning geometry and timing... cool area of research
Hahaha, I love this channel concept.
Implies a perfect HE wih no real world imperfections.
IRL there are always higher and lower pressures, which distort the ideal wavefront, what makes these ultra high performance shaped charges nearly impossible.
Of course. But you always start an engineering simulation with ideal models and conditions. After than you add in nonidealities to see if it matches expected and empirical test results. You NEVER believe an engineering simulation is truth - that's a sign of incompetent engineer!
Fascinating.
The model enforced symmetry is giving the illusion that some very unstable results work, and I suspect that a too simple material model is not correctly dealing with sound speed.
reminding me of the fact the us navy during the 1950s was fucking about with aluminum shaped charge warheads, ranging in size of i think 2 inches all the way up to 16in, fun times back then
We better see some penetration tests against different armor with that final design
This can be posed as an optimization problem where you start with some shape, then allow the shape to vary to maximize the velocity and/or other parameters.
My thoughts are... Very spicy research.
We need to see the other end of those simulations
It's wild how what used to be an expensive and dangerous test can now be repeated time and time again, at a negligible cost, with such minor alterations as a single degree of the cone angle...
SHAPED CHAAAARGES
Very interesting that your final result resembles a warhead.
epic experimentation
These are used for EPEMP devices. Replace the liner with an energized helix of flat wire with an insulator of similar density to the metal. 😮
Me who flunked high school physics: "Ah, yes. Of course. I see." [TV static noise intensifies]
"you know exactly where I'm going?" Aaaannd we have panzerfaust mark 2 lol
Thin the design toward the end, and slightly bulk it up in the back. It looks like the energy is reduced a bit as it is overcome by the charge around it in the end. With thinning sides toward the front, it would seem that as the energy progresses from the initiation point, it will be focused and forced out with less reduction. Just a guess.
I wonder how they designed these things before proper computers. Lots and lots of trial and error?
Its neat but you can do many analog waveform amplifiers in a row and reach much higher speeds effectively creating a material laser. They are neat.
Real-World testing beats simulation. That's how the Munroe effect was discovered.