The Mystery of the British tungsten alloy APDS
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- Опубліковано 30 вер 2023
- Functionality test of the cap used for British tungsten alloy APDS.
120mm L15 APDS tungsten alloy core at 1310 m/s. (0.9km distance)
vs
300mm steel armor (~280 BHN, average toughness)
Both projectiles have the same total mass. - Наука та технологія
![Tiger 1 vs M4A3E8 [MPG]](http://i.ytimg.com/vi/HRca3mheJt4/mqdefault.jpg)
It looks like the cap is helping to concentrate the force of the shell, and helping to prevent it from mushrooming. Even when the cap shreds off, it's already helped to force-form the slug itself into an "arrow" shape.
A self forming shot trap, amazing
Not really. A shot trap is when armor (typically on the lower turret) is angled in such a way as to enable a round to ricochet off of it and into a thinner plate of armor. Prime example is the late war modifications of the Panther where the turret lost its rounded bottom mantlet. @@quigglebert
@osurulz2010 fair enough, my understanding was a shot trap effectively guided the shot in from what otherwise would have been a bounce, I.e the separation between Hull and turret, thus my thinking the ballistic cap effectively is a deployable shot trap from the shells side of the equation
So less "mushroom" basicly?
Maybe the cap focuses the energy of the projectile more into one place of the armor, leading to better penetration, while without the cap the energy spreads out more?
Imo, the projectile at the top is juste a little bit longer, so it have more pénétration. The cap is just a shape optimisation to increase the length
@@halifax6228 projectile is longer so that the energy matches, because that's what counts in the comparison, not the length itself.
Roundy tries to push everything forward, pointy moves material to the sides, even deep inside the hole it keeps rolling inside out (like a prepuce), if the cap had different color maybe we can see what is going on
A side by side view of both clip would have been great , but great video as usual !
Not known to many, but, the cap was designed so that when it strikes oblique angles of armor, the nose of the cap turns away and the base of the cap ‘knocks’ the tip of the penetrator towards the armor
would love to see that shown in a sim
@@dominuslogik484 idk maybe I’ll do that when my pc is fixed
Spot on student
I would love to see a similar functionality test of how the cap performs at a 60 degree angle
The cap is primary designed to reduce ricochet. As it strikes the armour, the cap bites and turns the penetrator into the armour. We thats what they told us a the RAC gunnery school
I'd like to see these tested against plates at 60 degrees
can you do a simulation of the LOSAT missile if you’re not too busy :) idk if it works like that or if you need data already :/
I need data
Can i use caps to improve hammering nails to the wall ? I hate when they just bend :'(
Can you make a simulation of TOW 2 missle vs T-72M1 front plate covered in ERAWA 2 ERA? There was a test of such combination against Panzerfaust 3, and it actually stopped the jet. I'm curious if it could save crew from heavier warhead.
Can you test the effect of angling ERA vs APFSDS or HEAT?
probably I could, but I don't know if it's interesting. Less inclined ERA, smaller effect
My guess is any discrepancies between the simulation and real world test figures would be correlated to inaccuracy or improper reactions of the propellant used in the original calculations
I’m guessing this cap is to prevent shattering with the shell.
The cap for this purpose is used in hard and brittle metals. Tungsten alloys don't need it.
is there a way of "coloring" each part so we can see where that mass ends up? something i dont understand is why the shell in light grey seems to lose mass, i dont know where that goes, i assume it spreads like butter lining the hole but its confusing to me. anyway i still enjoy the videos haha
also the plug at the end in the caped shell seems to retain some of the original shell's shape, can you put a "grid" to show how the mass of the target shifts as the shell pushes trough? im probably asking for too much nvm
There is a way, sometimes I show the "full view", but only sometimes because it obscures the view.
Another follow up question.
Assume non monolithic steel layers.
Does it exist an optimal array, of course with better mass efficiency compare to monolithic plate, that can consume the cap and turn the capped projectile back to the uncapped one?
Yes but its used for traditional APC or APCBC rounds. Its called a decapping plate. Its basically a spaced layer thick enough to decap the round. The space need to sufficient for the cap to properly detach though. For these reasons it only exist on ships.
This projectile or any projectile?
Does it exist in reality or does it exist theoretically?
@@dejmianxyzsimulations4174
This projectile. But Im sure about the next part.
I don't think my question is very well thought out.
Maybe try it against the composite block upgrade on t55?
Plz, can you make video about different cannon from WWII vs modern vehicles (like IFV, MRAP, APC and similar)
I think he was the one that tested the Jagtiger 128mm shell vs the hull of an early M1 abrams. pretty impressive tbh
So, this is not unknown.
We alsp observe similar effect with wc penetrator.
My question is to what extend does the cap material effect the final result. Can you test that?
maybe someday
does the cap harm performance against angled plates or is it beneficial for that too?
It is not harmful because it is not connected to the core.
@@dejmianxyzsimulations4174 Don't caps actually help at going through an angled plate?
@@v4skunk739
There is a transition zone of impact angle roughly up to 40 degree from horizontal where the frontal condition of the projectile still play some part in the penetration.
Beyond that it is almost exclusively about mass/area that get smash onto the armor. Everything else being equal, capped projectile tend to have more mass getting kick away than uncapped one.
Of course you can modify the projectile geometry, intentional weakspot, differential hardness, etc to allow capped projectile to have more mass smash into the armor.
seems to me like the cap almost kind of "greased" the projectile by deforming and sliding along the sides of the projectile. probably not accurate at all but that was what it looked like
could you please do losat?
what is the name of this simulation?
It reminds me the BR-350A
The cap turns into grease for the core to propel it into the massive "plug effect".😄
Could you do Mark IV vs A7V, frontal armor, at 250m; PTRD vs Panzer III side turret/armor at 200m; and ( I know it is hard) but Volksturm vs T-34-85 [Panzerfaust 60 vs side turret of T-34)
OR
-75/88mm Pak 40 (HE) against t-34 top frontal armor
-10.5 cm LeFh 18 vs frontal/armor t-34
-15cm Schwere field howitzer 18 vs top t-34/ I-2/ su 122
There was a video of 105mm HE shell against the turret of a T-34
@@ivan5595 I was thinking roof armor and what 10.5/15cm HE can do to it. And a similar video but with the top armor of a T-72 by a 155/152mm HE shell (plunging fire).
With the cap will less likely to penetrate angle armor ?
The cap is not attached to the core, so it won't make it bounce.
Can you shoot both of these into a t55 or t62 front plate to check?
@@contagioushavoc5794
105 data shows armor provide no resistance at same v_impact.
120 is just the exact same projectile but scale up.
No cap
👍
Cap acts like a lubricant on a drill bit it looks like.
The cap is +1 Armor Piercing
With cap it acts more like APFSDS
The superslow really hides the fact the people behind the spalling are gonna have a real bad time
Id be interested in seeing a faster speed of the shot to really ram that point home that you get spallong, you get dead
Capped AP rounds date all the way back to before WW2.
en.wikipedia.org/wiki/Armour-piercing%2C_capped%2C_ballistic_capped_shell#Armour-piercing_cap
Perhaps the same mechanism is at work on the British tungsten alloy APDS?
Caps from that erra are to reduce the chance of the projectile shattering and were relatively soft.
Can you do a simulation of Russian Vacuum-2 125mm depleted uranium shell from 2A82 gun vs front hull/turret of leopard 2 or m1 abrams?
There is no data
Cap like lubricant
Try oblique target. This is what this cap was designed for.
remember that just as slope protects armour from projectiles, slope can also protect the integrity of a (sloped) projectile.
Spall
Its probably there to defeat Kontakt and the like. Looks to me like it deflects the blast from ERA for a fraction of a second, and thus prevents or reduces deflection of the main penetrator.
Chieftain was accepted into service even before Kontakt-1
and kontakt-1 does almost nothing to kinetic projectiles, kontakt-5 came out much much later