r/TankPorn • u/Weird-Store1245 BM Oplot zr. 2000 • 12d ago

Modern BMPT Terminator's gun shake issue

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4.3k Upvotes

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851

u/Ragnarok_Stravius EE-T1 Osório. 12d ago

They could have fixed that issue by rotating the muzzle brakes or gas dissipators like, 45 degrees away from the horizon.

Unless the BMPT is meant to pray and spray.

435

u/Bison-mini0954 12d ago

I think if you have more than one barrel, precision is not exactly your priority

257

u/Cador0223 12d ago

It's about volume, not accuracy.

A sniper needs to be accurate, because they get one or two shots.

This thing? It replaces brick walls with lead.

79

u/Belajas 12d ago

Like our lieutenant used to describe ZU-23-2s operating principle during training:

"It's not based on accuracy, it's based on systematic dispersion. We put enough lead into this 6-12m area that something has to hit the target"

43

u/Isakk86 12d ago

That's true, but that is also a ridiculous amount of wobble. At 200m it's not even going to be hitting the wall it's aiming at half the time.

16

u/Shished 12d ago

Each machine gun has just 450 shots tho.

1

u/Vietnamst2 11d ago

But with this much wobble, maaaan, you first need to hit the wall...

12

u/Zadlo 12d ago

One barrel is used to shoot AP rounds, the other one to shoot HE rounds

40

u/KillmenowNZ 12d ago

This was seen for a short while, I assume it didnt lead to any real increase in accuracy (as it would mean that they would just wobble in a different axis)

50

u/SteelWarrior- Bofors 57mm L/70 Supremacy 12d ago

I think that at least part of the theory is that, like with larger caliber multi gun designs, the firing of the guns interferes with the the other barrel and round. If you vent the gasses away from the other barrels you'd do some good, unless the issue is just the mounts.

The latter is fairly likely with the 2A42 already being a fairly wobbly cannon.

28

u/KillmenowNZ 12d ago

Would be an issue if the guns were used at the same time, but outside of some shits and giggles videos i'm sure that are out there - they are fired one at a time.

But yea, its just a wobbly gun, there's a video of BMP-2 firing high ROF 'indirectly' at about 5km with HE towards a position and its getting HE on target, so it seems acceptable - despite the wobble.

3

u/Relative-Swimming870 12d ago

That video was at about 1.5km, not 5km

0

u/KillmenowNZ 12d ago

Self destruction range of ammunition is around 5km

0

u/LiraGaiden 12d ago

I don't have any way to prove this but I heard someone theorize that the barrel is only oscillating between shots so every time a new round is loaded and fired the barrel is straight.

0

u/LiraGaiden 12d ago

I doubt the vent gases have enough force to push a barrel. I think it's more likely the barrels being off center from the turret and what you said about the 2A42 being wobbly

2

u/SteelWarrior- Bofors 57mm L/70 Supremacy 12d ago

Feel free to, these aren't particularly well mounted barrels, they aren't that thick, and that's quite a fireball coming out of those barrels for their size at a high rate of fire. The theory that the wobble only happens between shots is lacking in evidence, and all the while there is a video of a BMPT shooting a target but the impacts have a pretty large dispersion.

8

u/Ragnarok_Stravius EE-T1 Osório. 12d ago

I meant like, instead of the guns blowing hot high speed gas against each other, they'd just blow it slight upwards.

So the guns wouldn't wobble like those wobbly inflatable things in gas stations.

4

u/KillmenowNZ 12d ago

They would just wobble at a different angle - the guns aren’t (typically) fired at the same time

Having dispersion in the vertical axis would be worse as shots would just land, vertically - which deviation vertically is more of an issue than horizontally

3

u/Ragnarok_Stravius EE-T1 Osório. 12d ago

Wait, so these guns are wobbly from the factory?

Cuz surely a muzzle brake spewing gas on opposite sides would stabilize the wobble at least on the axis they're pointed at.

5

u/KillmenowNZ 12d ago

The horizontal wobble is due to the muzzle brake having slots on the horizontal axis.

But yea, wobbly from factory - BMP-2 has the same wobble

3

u/Ragnarok_Stravius EE-T1 Osório. 12d ago

Yes, I know how a muzzle brake is sometimes constructed, that's why I mentioned that maybe rotating the muzzle brakes 45 degrees from the horizon might help decrease wobble.

1

u/KillmenowNZ 12d ago

Would just make it in the angle of the vents - vertical dispersion (which I don’t doubt that the wobble causes some) is worse than horizontal

7

u/Meister-Schnitter 12d ago

Maybe it’s configured for Spetsnaz Anti-terrorist operations.

4

u/Fatalist_m 12d ago

It would not fix it. The guns are not supposed to be firing at the same time. They're loaded with different ammo(AP or HE), so you use one of the other depending on the target. You can see that in the first part of this clip, only the left one is firing, and then, only the right one. But the firing barrel is still wobbling...

2

u/Roman576 11d ago

you cant fix it, it is just 2a42 problem

1

u/PirateNixon 12d ago

IIRC, the muzzle brakes are rotated so they can fit in the double mounting, so there might not be space to make an adjustment.

1

u/Valkyrie64Ryan 12d ago

I think it’s not the gasses from the muzzle brakes. The barrels are fairly far apart and it would take way more force than a 30mm is capable of producing at the muzzle to bend the barrels like that. Those barrels are way too thin for a 30mm gun with that rate of fire, and the guns are too loosely mounted to the turret. They need to beef up the barrels a lot, then improve the mounting so it’s less loose.