That sounds rather difficult to achieve. The rifling would negatively impact the integrity of the round (snapping a drill head is much easier than snapping a rod of the same material & diameter) and at those velocities it'll be difficult to guarantee the cutting edge won't shatter from the impact...
I would say greater spallinh is a benefit, the projectile was able to transfer more engery into the fragmentation, crew and critical systems behind that are gone.
the only problem hitting this specific stop on a tiger is that i believe the transmission would block most if not all the spall if hit towards the center, the tank would most likely be disabled due to damage of the transmission, but the crew would mostly fine
It may seem like not spinning may increase penetration but we have to remember that the spinning gives stability/precision. I remember the chieftain talking about heat rounds before fin stabilization that the spin motion decrease its penetration, but shooting it on a smoothbore cannon (no spinning) and no fins its accuracy was horrible "couldnt hit the side of a barn being inside of it"
HEAT works on different principles than a solid-core AP projectile. The spin of a HEAT projectile widens the jet generated by the shaped charge's detonation and reduces the warhead's penetrative capability. On an AP shell, the solid rigidity of the projectile prevents it from "spreading out" in the same way as the much softer liner of a HEAT shell does, and during penetration, the rotation doesn't to my understanding contribute to any reduction in effectiveness.
0:20 pov: ur the gunner and this is the last thing u see
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I mean rotation on the round reduces the armor penetration. And the explosive filler round can do better than a round that rotates without the expense of armor penetration.
@@militarysimulationlab Sure thing. I dont have data on the british 6pdr gun, but the german 75mm Kwk 40 L/48 had a uniform twist at 7°. Assuming muzzle velocity of 790m/s the outer surface of the shell would move as it leaves the barrel at 790 * tan(7°) = 97m/s. The circumference of a 75mm calibre shell is 0,236m. That's 412 RPS or 24720 RPM.
Good idea. I was already preparing a vid on the shot with a spiky skin. And I’m also studing how I can do more realistic simulations on the diamond materials than the previous vids. If it’s done, I will give you more vids on the diamond things.
seems like rotation is adding a lot of "friction" just add a bit of explosives into it and it will be a lot more effective, APHE was invented for a reason)
@@RAYY_WILD It effects the spall generated. The point is that on thicker armor the fuze breaks and the shell does not explode, it just acts like regular AP. Since AP vs. APHE is usually around a 10% difference in penetration power or so, it's questionable if the slight benefit in potential damage from an APHE shell is worth the reduced penetration
But what degrades the penetration of the Fast Rotating Shell (FRS) is not the rotation itself, its the yaw accompanying it. Perhaps a reasonable rotation speed would not be detrimental to its penetration capability.
@@militarysimulationlab it looks like the FRS had less residual velocity after perforating the armour, which means it would need higher initial velocity in the first place.
I think that depends on the muzzle vel. Please refer to the performance chart given in the vid. If I misunderstood something in the chart, please let me know.
It really depends on the ammount of gunpowder and the lenght of the barrel. Remember that a 75mm could be a reaaaaly short barreled early pz4, could be a late decent cannon pz4, could be a sherman, could be a panther with far superior performance
@@militarysimulationlab tiger 1 was not brittle. Was quite ductile due to the steel grade at the time actually. Search it up. You can see the petaling of armour of tiger 1 penetration holes
Thank you for your comment. As you know, the structural behavior in the simulation strongly depends on the parameter I put. Let me reduce the brittleness in the next vid.
Well, both rounds have the same speed, one with no rotation and one with 300000 rpm. The rotation needs extra energy which has to be provided by a much heavier load of propellant. Rotation is bad for penetration. Use the same amount of energy this round needs for its 300000 rpm (+ the velocity) and convert it into velocity of a round with no rotation. Penetration will be much deeper.
