Crosscut of a Russian BMP barrel

>Hикoлaй Чичикaлo Yesterday at 2:14 PM
>Бepeжиcь Aмepикa. Бepeжиcь. Haтo виcoкo тoчнa збpoя paшки. Cтвoл. Бмп в poзpiзi

Could there be a reason to manufacture it like this? Or is this just Russian precision manufacturing?

  1. 2 weeks ago
    Anonymous

    >Could there be a reason to manufacture it like this?
    They getting shot from the left side, making it stronger

    • 2 weeks ago
      Anonymous

      What if it's not left/right, but up/down. Maybe it's some play on barrel harmonics?

      How does other end looks?

      • 2 weeks ago
        Anonymous

        >Maybe it's some play on barrel harmonics?
        yes the out of center bore allows them to whip shots around corners. Pretty slick if you ask me

    • 2 weeks ago
      Based Charlie Magne Poster

      >No, that's just terrible manufacturing.
      No, just 100 contractors until it just tartars working for food

  2. 2 weeks ago
    Anonymous

    >Could there be a reason to manufacture it like this?
    No, that's just terrible manufacturing.

  3. 2 weeks ago
    Anonymous

    i think the BMP-2 has even bigger engineering flaws than this.
    also as this war has shown, the average lifespan of a BMP is measured in days, maybe weeks

    • 2 weeks ago
      Anonymous

      That's a BMP-3
      BMP-1s have smoothbore guns, BMP-2s have 30mm autocannons

      Post yfw 1960s USSR could precision manufacture gun barrels and modern day Russia can't even with laser and computer assisted manufacturing.

      • 2 weeks ago
        Anonymous

        are you sure? This looks like a 30mm autocannon barrel

      • 2 weeks ago
        Anonymous

        Maybe to prevent sagging?

        If it's a BMP-3 then it would be a low pressure gun, basically similar to a field gun.

        are you sure? This looks like a 30mm autocannon barrel

        You're right, it's indeed a BMP-2.
        Doesn't change anything to my last sentence though.

        • 2 weeks ago
          Anonymous

          You cut your measurements from the sharpie and not the edge of the barrel.

      • 2 weeks ago
        Anonymous

        >modern day Russia with laser and computer assisted manufacturing

      • 2 weeks ago
        Anonymous

        What means cimputer assisted machining

        t.Henry from Paris Oblast

      • 2 weeks ago
        Anonymous

        Brain drain. The oldies who stuck with the commie regime were pushing their engineering feats, but most future engineers who grew up decided to gtfo, hence all the outdated legacy tech and slow dribble of new tech.
        It’s now happening with russian IT, so russia’s digital future is going to lag very behind into the forseeable future as well.

      • 2 weeks ago
        Anonymous

        >the final days of Rome

      • 2 weeks ago
        Anonymous

        BMP-2 and BMP-3 both have 30 mm autocannons, the difference is that the 2 uses the 2A42 and the 3 uses the lighter 2A72.

    • 2 weeks ago
      Anonymous

      Isn't that like the average lifespan of fruit flies?

  4. 2 weeks ago
    Anonymous

    >Russian precision manufacturing
    Oxymoron

    • 2 weeks ago
      Anonymous

      >Russian precision manufacturing
      >Oxymoron
      This
      >t. vostok watch operator

      • 2 weeks ago
        Anonymous

        >Vostok Komandirskie
        lmao

        "good enough" should be the Russian national motto

      • 2 weeks ago
        Anonymous

        I have one of those watches. They were always off by one minute after every 12 hours, precision russian engineering everyone.

      • 2 weeks ago
        Anonymous

        Mine shat itself last year, any idea how to fix it? Iirc it was the common "for no reason my internals will now cease to function" problem

        • 2 weeks ago
          Anonymous

          When I diy regualated mine I noticed 2 things, metal shavings in the case, and these watches shut down if you fuck with the winding stem and put it out of the parked, wind, adjust time posisions. I recommend starting with taking the case back off, setting the stem to the adjust time position, then press the tiny button to release it and then remove completely, inspect stem for any bendinfing then reinsert while holding the relese button to all the way screwed down. Good luck with your foray into watch making anon!

        • 2 weeks ago
          Anonymous

          Mine kept stopping at random times. I smacked it pretty hard like I would when clearing a malfunction and it's run ever since.

          • 2 weeks ago
            Anonymous

            Ah, the good ol' percussive maintenance

      • 2 weeks ago
        Anonymous

        I almost bought one of those last year when Bitcoin went parabolic; kinda glad I didn't. Only reason was that the only 24-hour format dials that the shop had were both cargo ship designs, not spaceflight related, and I didn't think that was cool enough.

      • 2 weeks ago
        Anonymous

        >runs 75 seconds fast per day
        I had a piece-of-shit-stok for a while too,anon.

      • 2 weeks ago
        Anonymous

        VEHDEHVEH

  5. 2 weeks ago
    Anonymous

    We spent HOW MUCH preparing to defend ourselves from a country that uses their eyeballs as a precision measurement tool to build $1m combat vehicles??

    • 2 weeks ago
      Anonymous

      I think you won't get to see where all the money went until their dumbasses try to push the button, and then you're gonna laugh at what happens to them when we're just sitting pretty and completely unaffected. And I think if we ever got into a conventional war it would look worse than the first time we smacked the shit out of Iraq.

    • 2 weeks ago
      Anonymous

      You can eyeball much more precise than pic related.
      I would say that is just not giving a fuck level manufacturing but you have to try to be that bad.

  6. 2 weeks ago
    Anonymous

    That is vatnik manufacturing.
    They are not but morons who pretend at greatness.

    • 2 weeks ago
      Anonymous

      Says the ESL moron.

      • 2 weeks ago
        Anonymous

        The only thing

        That is vatnik manufacturing.
        They are not but morons who pretend at greatness.

        got wrong was "not" should be "naught,"

        • 2 weeks ago
          Anonymous

          Which strongly indicates he's an ESL moron.

          • 2 weeks ago
            Anonymous

            it's a single spelling error man calm down

            • 2 weeks ago
              Anonymous

              That's not a spelling error, that is not knowing a phrase. ESL moron.

          • 2 weeks ago
            Anonymous

            pretty sure ESL morons use uncommon synonyms, not words that sound a-like but mean different things.

  7. 2 weeks ago
    Anonymous

    And now we know why Russian stuff is so inaccurate. This is the state of their manufacturing. Guaranteed that the factory tech knows the boring machine is off but knows nothing will happen because the factory manager will just steal the funds for a replacement. The manager steals it because he knows they can’t buy another one anyway so he may as well pocket the money. Besides it’s for drunken minorities in the army anyway so who cares.

    • 2 weeks ago
      Anonymous

      Anon if they took time, they wouldn't meet the commie quotas! Last year's record breaking numbers is this year's quota. Go faster, comrad.

      Wait, how the fuck does this even load properly? Are the Russians using hand fitted barrels?

      I think that's a much bigger issue and I have no idea. Maybe that's why this one got cut in half to see wtf was up, because I can't imagine it loaded particularly well or at all or something.

      I think you won't get to see where all the money went until their dumbasses try to push the button, and then you're gonna laugh at what happens to them when we're just sitting pretty and completely unaffected. And I think if we ever got into a conventional war it would look worse than the first time we smacked the shit out of Iraq.

      >Throw nukes at US
      >Reagan's STARWARS breathes to life
      >PLUTO launches out of Minnesota
      >HAARP causes 7 simultaneous category 8 hurricanes and 19 F6 tornados to hit Russia and China
      >weird black triangle ships from the secret moonbases start hovering above Vladivostok and just Philadelphia Experiment teleport the city somewhere

      Would be based if we had full schizo technologies

      • 2 weeks ago
        Anonymous

        > Last year's record breaking numbers is this year's quota. Go faster, comrad
        Absolutely this

    • 2 weeks ago
      Anonymous

      Yes, although I am more interested in the radial symmetry of the bore as that would effect accuracy more.

      Also as far as precision goes On Russian guns. I worked modding SKS’s when I was in machinist school, the tolerances were all over the place, but not severe enough that the function of the weapon was affected. The joke was that the precision depended on how much vodka their machinists had during or before their shift.

  8. 2 weeks ago
    Anonymous

    Maybe to prevent sagging?

    If it's a BMP-3 then it would be a low pressure gun, basically similar to a field gun.

    • 2 weeks ago
      Anonymous

      >If it's a BMP-3 then it would be a low pressure gun, basically similar to a field gun.
      The BMP-3 has a 30mm coaxial gun, together with a 100mm one.

  9. 2 weeks ago
    Anonymous

    I mean at least it’s made out of thick steel

  10. 2 weeks ago
    Anonymous

    Is this that weird?
    I always assumed the thickest part would be at the top or bottom to provide extra support.
    I hate russpiggies but this is reaching for fuck sake they know how to use a lathe.

    • 2 weeks ago
      Anonymous

      >they know how to use a lathe
      Yes they do, but why bother?

  11. 2 weeks ago
    Anonymous

    AK barrel threads are notorious for not being concentric, so that's probably just typical Russian quality.

  12. 2 weeks ago
    Anonymous

    >picture literally has millimetre measurements on it
    >people still arguing what gun it is

    it's clearly 30mm

    • 2 weeks ago
      Anonymous

      >picture literally has millimetre measurements on it
      Where do you see any measurement unit written on the gun?
      It looks pretty big for 3 cm, but again it's a close up, it's hard to picture the scale.

      • 2 weeks ago
        Anonymous

        the units aren't labeled but what do you propose those units are if not mm? Certainly not cm or inches.

        • 2 weeks ago
          Anonymous

          Of course centimeters.

          • 2 weeks ago
            Anonymous

            bump

            • 2 weeks ago
              Anonymous

              bot

              • 2 weeks ago
                Anonymous

                Actually it was me, thermal expansion boy, that missclicked and sent a message.

        • 2 weeks ago
          Anonymous

          Microfurlongs.

    • 2 weeks ago
      Anonymous

      with how shoddily it's made, it might be 31mm actually

      you never know

  13. 2 weeks ago
    Anonymous

    >muh rugged soviet design
    it was shit, has always been shit and still is shit. Anyone that actually lived in soviet union would tell you dumb fucks this.

    • 2 weeks ago
      Anonymous

      >Anyone that actually lived in soviet union
      I wouldn't wish that upon anyone.

    • 2 weeks ago
      Anonymous

      This. It annoys me that so many westerners are oblivious of this.
      t. Slav boomer with a red star in his birth certificate

    • 2 weeks ago
      Anonymous

      >Anyone that actually lived in soviet union would tell you
      anyone that is still human*

      can't say the same for vatniks who embraced the monkey and believe that shit quality and life is strength

  14. 2 weeks ago
    Anonymous

    How much does ~5% concentricity error matter? BMP-2 guns are very inaccurate to begin with. If there is atleast one thing russians can manufacture it should be a fucking barrel

    • 2 weeks ago
      Anonymous

      Not too much honestly, the gun is fine if it can be zeroed. However, this is indictive of sloppy manufacturing and other more important parts likely have defects too. This picture is just an instantly recognizable way to show that Russian manufacturing sucks.

    • 2 weeks ago
      Anonymous

      >How much does ~5% concentricity error matter? BMP-2 guns are very inaccurate to begin with. If there is atleast one thing russians can manufacture it should be a fucking barrel

      If they can't even center the hole properly, there's no guarantee it's actually straight and not in angle.

      E.g. all shots might go 100 m left at distance of 1000 m.

      • 2 weeks ago
        Anonymous

        Are 30mm caliber barrels forged or drilled+lathed from round stock? Misaligning a drill would be pretty bad, no clue about forging

        • 2 weeks ago
          Anonymous

          The barrel blank is probably forged, then the hole down the center is gundrilled, reamed, and rifled.
          Most likely the gun drill wandered due to it it getting dull.

          >Misaligning a drill would be pretty bad
          Yeah, horribly bad. But drilling very deep holes without them wandering is hard. Most likely the drill was properly aligned when it started the hole and then drifted off as the drilling progressed. QC should have caught it but they clearly didn't give a shit.

          t. machinist

    • 2 weeks ago
      Anonymous

      If you’re taking a shit in manufacturing for the defense department, what confidence goes into manufacturing of more critical things that require high precision like turbines?

  15. 2 weeks ago
    Anonymous

    How does that happen?

  16. 2 weeks ago
    Anonymous

    No surprise considering the russians filled the first 1300 T-64 turret cavities with aluminum instead of ceramic.
    http://btvt.info/3attackdefensemobility/432armor_eng.htm

    • 2 weeks ago
      Anonymous

      Um...yeah? Those were the early days of composite armor development. And in fact the first time anybody produced it on a large scale. So yeah, they had an original system they started production with, and which they later switched out for another one that worked better after they finished development on that.

      Mind you, at the same time western MBTs were still just rolling with plain steel armor.

      • 2 weeks ago
        Anonymous

        >Mind you, at the same time western MBTs were still just rolling with plain steel armor.
        true enough, to be fair. the us planned on using siliceous cored armor for the m60, but price and manufacturing issues kept composite armor out of us tanks until 1980

  17. 2 weeks ago
    Anonymous

    Wait, how the fuck does this even load properly? Are the Russians using hand fitted barrels?

  18. 2 weeks ago
    Anonymous

    wow, that is pretty indefensible. Even with WWII era technology, shit should not be that off.

    • 2 weeks ago
      Anonymous

      Even with WWI tech that's inexcusable (machining was refined in that era, see contemporary Mausers etc).

  19. 2 weeks ago
    Anonymous

    that has to be deliberate.
    but for what purpose?

    • 2 weeks ago
      Anonymous

      >that has to be deliberate.
      >but for what purpose?
      Maybe it's to combat stringing when the barrel heats up (and thus loss of zero). The differences have to be up & down, and that affects how the barrel pulls as the metal expands upon firing?
      At least that's the only plausible explanation I can think of?

  20. 2 weeks ago
    Anonymous

    this is a pretty normal occurrence when drilling high aspect ratio holes. Back in the day, and i assume to a certain extent today, after the blank was bored and rifled they would be straitened then the outside diameter would be turned. It's possible they simply determined that it didn't make enough difference to bother scrapping the part and starting over

    • 2 weeks ago
      Anonymous

      That's similar to how I make barrels, drill and ream inside undersized, put in tight fitting expanding mandrill to hold it from the inside with one on both ends, turn between centers to make sure the outside is as concentric with the inside as possible, and then with a four jaw and steady rest finish the ID and ream the chamber/free bore. I do any kind of crowns and threading last, and then it's ready for a rifling button. It is probably a little different from how most people would do it, like just using a four jaw to start with and boring it out to size but I do not trust the imperfections that come standard with barrel blanks outside uniformity. I heard that it was not required to have a uniform thickness on precision rifles' barrels for them to be accurate, and some vary as much as 10 thou (0.010 inches) but I do not trust it and I only do it for personal projects so a few added steps to bring it within ~1/2 tenth (0.00005 inches, smallest I can reliably measure with my tools is tenths) will eliminate one possible source of inaccuracy from me.
      >t. Also machinist

      • 2 weeks ago
        Anonymous

        You sound like you know your business well, anon. I bet your barrels are second to none.

        • 2 weeks ago
          Anonymous

          I only make them for myself as a hobby, but my job is making and repairing (mostly) aircraft parts so most stuff I do has to be to a tight tolerance. Other people could probably make better barrels, but at some point without getting better machines there is a limit to how accurately I can measure and I'm well past how accurate I can shoot already.
          >I just googled what tolerances are used on watches, and got .002mm which is ~0.0787 thou or a little more than half a tenth. Better accuracy than watches in barrels lol.
          There are lathes out there that are large enough whilst also being accurate enough to make x<1" gun barrels better than I can if given better measuring tools and tightening up the gibs like the Hardinge HLV-H which iirc was from factory accurate to quarter-tenth. Gonna look up how much better measuring tools cost now.

          • 2 weeks ago
            Anonymous

            >barrels finer than watches
            That's a pretty cool flex senpai.
            >lathes factory accurate to the quarter ten-thousandth
            Holy christ. That machine must cost in the millions

  21. 2 weeks ago
    Anonymous

    By this point I actually think we let Russian spies have the plans to build their first nuke on purpose, just so we'd have someone to have an arms race against.

    I refuse to believe such an Africa-tier people are capable otherwise.

    • 2 weeks ago
      Anonymous

      >Anon discovers the military-industrial complex

    • 2 weeks ago
      Anonymous

      the thing is that politburo during ww2 was consisted of 2 georgian lad 1 armenian, 1 russian, 1 garden gnome. now its mostly slav.

    • 2 weeks ago
      Anonymous

      Russia was unironically carried hard by everyone else around it in both its imperial and USSR days, from Germans and Poles/Balts to especially Ukrainians funnily enough. Nowadays its just Russians doing it all and it shows.

    • 2 weeks ago
      Anonymous

      The same thing basically happened with Israel, though they continue to be deliberately ambiguous about their nukes and how they were able to create them

      • 2 weeks ago
        Anonymous

        To be fair the Israelis spy on just about everyone. Not directly related but it's still kind of a mystery as to how the galil first came to be. We know with 99.99999% certainty that the Israelis used the technical data package for Finnish valmet rifles as a starting point but we don't know if it was gifted, stolen, sold or some combination thereof.

  22. 2 weeks ago
    BigC

    everyone knows russia cannot into concentric bores
    it's simply too difficult for their caveman retard asses
    yet people pay thousands for guns with non-concentric bores, they even fight eachother to get this garbage
    it's fucking hilarious

  23. 2 weeks ago
    Anonymous

    Imagine what happens when it gets hot. It's going to bend away from the thick side like a freaking banana

    • 2 weeks ago
      Anonymous

      >like a freaking banana
      that's exactly the plan comrade

  24. 2 weeks ago
    Anonymous

    As I’ve said before, there’s a REASON why Russian guns suck so much. This is probably an extreme example but I bet they simply can’t plum a a nice straight, centered concentric bore. Now imagine how shitty all those artillery tubes are. How unbalanced their shells are. Etc. Meanwhile Western MIC probably does QC with electron microscopes.

    • 2 weeks ago
      Anonymous

      >Meanwhile Western MIC probably does QC with electron microscopes
      Yes and no.
      You'd be amazed at some of the janky ass shit we get away with.
      >t. On MIC payroll

  25. 2 weeks ago
    Anonymous

    I'd assume it's because there is an autocannon on one of the sides of the cannon.

    • 2 weeks ago
      Anonymous

      Nevermind, I just realised it's the 30mm. Still, might be asymmetrical for the same reason.

      • 2 weeks ago
        Anonymous

        >asymmetrical because the coax is somehow going to heat up the 30mm barrel from firing enough to where heat warping is an issue
        Bro just admit this shit is not acceptable. You know that’s not true, AND the 100mm barrels on BMP-3s are symmetrical (at least supposed to be)

  26. 2 weeks ago
    Anonymous

    who cares? it's getting indexed at the mount point and it's precise where it's needed, it doesn't really matter what sticks out the turret: as long as it's thicker than minimum they send it

  27. 2 weeks ago
    Anonymous

    that is some original Soviet engineering barrel you got there

  28. 2 weeks ago
    Anonymous

    Everywhere I go I'm reminded of her...

  29. 2 weeks ago
    Anonymous

    [...]

    >NEW(TM) GLORIOUS CLOTHES REMOVAL ROBOT ASSEMBLED IN GLORIOUS RUSSIA (parts manufactured at Renault)

  30. 2 weeks ago
    Anonymous

    [...]

    [...]
    >NEW(TM) GLORIOUS CLOTHES REMOVAL ROBOT ASSEMBLED IN GLORIOUS RUSSIA (parts manufactured at Renault)

    This looks like it could be the aftermath of lathe video that gets posted in rekt threads over on gif. Anybody know if it is?

    • 2 weeks ago
      Anonymous

      http://arhivach.ng/thread/635760/

      • 2 weeks ago
        Anonymous

        I'll be damned.
        It is the aftermath.
        Thanks for the link Anon.

  31. 2 weeks ago
    Anonymous

    I'd assume these are bored on heavy duty lathes? It's shouldn't be that hard at all to properly center the workstock woth the machine

  32. 2 weeks ago
    Anonymous

    [...]

    It's insane how a machine so unassuming can reduce a human into a pile of mush so effectively

  33. 2 weeks ago
    Anonymous

    [...]

    That looks like a workshop with very poor OSHA standards. Turnaround must be very high.

    • 2 weeks ago
      Anonymous

      Turnaround is actually just 1, but doing so very rapidly.

  34. 2 weeks ago
    Anonymous

    why would this matter exactly..

    • 2 weeks ago
      Anonymous

      Go and take a look at slow motion video of a rifle barrel during a shot, especially a lighter profile one to exaggerate the effect- during the course of a shot being fired, it will flex. That’s not the end of the world if it’s known and predictable - look for example at service rifles from a hundred years ago, where they used the full length wooden stock to brace the barrel in several deliberate places to control barrel whip and make it shoot repeatably.

      Now consider that cannon barrel- with more material on one side than the other the harmonics of it under firing pressure could be fucking anywhere. If it’s that uncentered at one end it’s entirely possible the bore isn’t even drilled parallel to the rest of the blank. You can’t predict the behavior of a run of barrels and say they’ll all predictably do the same thing and account for it in sighting, you can’t brace a cannon barrel in a turret.

    • 2 weeks ago
      Anonymous

      If this is not intended the barrel could explode because the 8mm. aren't enough to withstand the pressure.
      If this is intended it could stiffen the barrel.

      • 2 weeks ago
        Anonymous

        no
        no
        just no

        the opposite side would have higher compression and the tension wouldnt be the same throughout the material

    • 2 weeks ago
      Anonymous

      The barrel would be heavier and use more material than needed. That's pretty much it. That's assuming that they increased the safety margin to take it into account. But given that we haven't seen any BMP barrels exploding, it's safe to say they have. There shouldn't be any accuracy problems. once the gun is zeroed in it shouldn't matter.

  35. 2 weeks ago
    Anonymous

    [...]

    I saw an accident with an engine lathe being installed at the tech center in high-school. It was hooked up with a chain to the gantry in the ceiling leading down to the chuck, they hooked up power and apparently some asshole had left it in gear. Then the equipment that weighed about as much as a truck proceeded to climb up the chain to the ceiling and snap it before crashing 20 feet back down to the floor.
    It really put the power of lathes into context for me and 13 years later in still weary around them every day.

    • 2 weeks ago
      Anonymous

      Was lathe OK?

      • 2 weeks ago
        Anonymous

        No not really, still worked but it warped the ways and damaged the controls.

    • 2 weeks ago
      Anonymous

      >Pressing X to doubt
      No one would ever lift a lathe from the chuck, ever.

    • 2 weeks ago
      Anonymous

      How many ways is that retarded? Let me count the ways:
      1) wrapping a chain around the chuck to move it,
      2) leaving everything in gear while being transported,
      3) connecting power when the machine wasn't even close to being ready to be turned on

      probably a bunch more. I've heard of even more stupid behavior from machinists who were moving equipment, but not by much.

  36. 2 weeks ago
    Anonymous

    Very unorthodox.
    If I had to make an intuitive guess I would say that it could stiffen the barrel if the thick side was at the top or bottom.
    This would be such a grossly negligent mistake it's almost impossible.
    It would be interesting to know if these tolerances are consistent along the entire length of the barrel.
    If not, the raw steel pole was bent or the drilling awl was used with too much pressure.
    Being off by 15mm. as a machinist is a day 1 apprentice mistake.

  37. 2 weeks ago
    Anonymous

    O
    B
    R

    • 2 weeks ago
      Anonymous
    • 2 weeks ago
      Anonymous
    • 2 weeks ago
      Anonymous
    • 2 weeks ago
      Anonymous

      iron curtain clenches its grip

    • 2 weeks ago
      Anonymous

      Hee hee hoo hoo

    • 2 weeks ago
      Anonymous

      DELET ZiZ

    • 2 weeks ago
      Anonymous
    • 2 weeks ago
      Anonymous

      ???

  38. 2 weeks ago
    Anonymous

    >Shit Mykola! You fucked up another barrel!
    >Don't worry Taras, we can still make use of it.

  39. 2 weeks ago
    Anonymous

    Impressive.

    With this most recent achievement, fate has, in a single stroke, marked the decline of the West and spelled a new era of wondrous prosperity and global peace for the Russian bear, which promises to stand in sharp contrast to the historically inconvenient ascent of Western democracy and its cruel limitations on the oligarchs of the world. The blessings of sugar payment plans, Slava class submersible cruisers, quantum Mach 1000 mallbuster missiles, Poseidon tsunami torpedo mockups, and S-400 self-homing air defense systems will be the instruments by which Russia affirms its noble stewardship of 21st century world politics and offers non-Western oligarchs a different option: an illiberal alternative to the hassles of Western democracy and the opportunity for a more profitable and secure multilateralism

    • 2 weeks ago
      Anonymous

      >Mach 1000 mallbuster missiles
      >S-400 self-homing air defense
      top lel

  40. 2 weeks ago
    Anonymous

    Probably fake. 30mm barrels are way thinner than that. (This looks more like a 50-57mm.) Also looks like whoever cut off that barrel didn't do a straight cut, distorting things.

  41. 2 weeks ago
    Anonymous

    >westoids not understanding advanced bore design

  42. 2 weeks ago
    Anonymous
    • 2 weeks ago
      Anonymous

      Goddamnit

    • 2 weeks ago
      Anonymous
  43. 2 weeks ago
    Anonymous

    Top is thicker to compensate for barrel whip? BMP2s have the ability to shoot far faster than... most(?) similarly equipped vehicles.

  44. 2 weeks ago
    Anonymous

    Does anyone have the article from years ago that interviewed a few Cold War boomers that had received Soviet tanks for the purpose of reverse engineering/analysis and basically said that Russians had World War II level manufacturing processes?

    That basically everything was screwed in by hand or banged in with a hammer and that they were seeing the same approach to assembly in everything they inspected.

    I can’t recall if it was an article or a book, but it was an interesting insight into the Russian way of things that still seems to exist.

  45. 2 weeks ago
    Anonymous

    Russian engineers are smart enough to understand that offset will matter only close to the barrel overheating.

  46. 2 weeks ago
    Anonymous

    See, Igor, when cut barrel like this, must not shoot the inaccurate.

  47. 2 weeks ago
    Anonymous

    Pretty much all gun barrels are like this, just not as big or as visible or as bad.

    You start with a steel rod, then you deep-hole drill it. Maybe your drill wanders a bit, or maybe the rod was bent at first, whatever. Then you stare down the tube you've made and look at how the light reflects internally and then you try to bend it so that it's straight.

    Obviously, being off center isn't optimal, but it isn't that big of a deal. As the barrel heats up it will distort, which is bad, but they're all going to have some of that problem. Maybe it'll only be 1mm off center, or 0.005mm off center, but guaranteed you won't be perfect down the entire length of the tube.

    • 2 weeks ago
      Anonymous

      Honestly the issue isn't the barrel itself, it's the rest. The loading mechanism, the ammo storage, all of them depending on a precise mechanisms to work. The barrel will almost shoot fine, but not load correctly for example.

      And if the barrel looks that bad, just imagine how the engines or ball bearings look like. This is their production standard.

      • 2 weeks ago
        Anonymous

        Assuming it's just the centricity is off. If the drilling is at an angle or something then the barrel won't shoot straight as well.

      • 2 weeks ago
        Anonymous

        This, there is an optional finishing operation where the excess off-center is lathed back to parallel the bore. Done to save weight and for cosmetic on small arms where it is obvious and annoying. ZUs have big can muzzle brakes on them can't see it.

      • 2 weeks ago
        Anonymous

        Whenever you just agree with some dipshit doing damage control, you diminish the whole discussion, just because you're an obsequious idiot who has to agree with everything. Tend to control yourself better.

    • 2 weeks ago
      Anonymous

      >Then you stare down the tube you've made and look at how the light reflects internally and then you try to bend it so that it's straight.
      The trick to good barrelmaking is that after straightening the bore, you turn down the (now bent) outer diameter to be concentric with the inner diameter (bore, rifling), especially at the muzzle and chamber ends.

      • 2 weeks ago
        Anonymous

        This is the key
        If you can't turn it straight using lasers WHILE cutting it, you do it after you give yourself room to cut down on the outside to counter any off bore drilling.
        Russians do neither.

  48. 2 weeks ago
    Anonymous

    First, that's Ukrainian. Second, that is obviously a rejected part.

    This fucking Ukrainians have turned PrepHole into a dumb sewer with their dumb, uncreative and juvenile propaganda. Fuck off.

  49. 2 weeks ago
    Anonymous

    [...]

    >That's a Ukrainian X
    oldest Russian cope in this war

  50. 2 weeks ago
    Anonymous

    Omg it's over for Putler, Moscow in 2 weeks

  51. 2 weeks ago
    Anonymous

    That shows the machine operator gave less than zero fucks boring it then the rifling machine just followed the hole.
    That's unacceptable by pipe standards let alone cannon. I'm sending it to my machinistbros to laugh at.

    • 2 weeks ago
      Anonymous

      When getting paid 11k USD a year, fucks you will not give

      • 2 weeks ago
        Anonymous

        Not just that but your higher ups probably embezzle half the budget and then like half of the remaining scraps need to be put towards bribing the local law enforcement and organized crime.

        • 2 weeks ago
          Anonymous

          The passed a sort of wartime-economy thing a few weeks ago in terms of Russian Military wants- it gets and the end company doing the making basically gets to have whatever the Russian Gov sort of deems worth paying them for it.
          So the fucking for the guy on the tools in the next few months is going to have no lube and probably a lot of overtime fucking on top

  52. 2 weeks ago
    Anonymous

    DESU, nothing wrong with it if the bore line is straight.
    2A42 is a 20-ton recoil waaaagh tech with just 3-5 cm of backward recoil amortisation.
    It is notoriously inaccurate due to bouncing at "fast" firing mode.

    Most likely it is done as a cheapo thermal offset or as anti-sagging.
    Anyway, waaaaagh tier shit.

    • 2 weeks ago
      Anonymous

      >It is notoriously inaccurate
      You don't fucking say

  53. 2 weeks ago
    Anonymous

    East euro debils, polak and baltics reddit nogun retards seeing barrel for the first time in their lives. Bottom of the barrel is always thicker, the state of PrepHole these days, I'm outta here just can't take it anymore.

    • 2 weeks ago
      Anonymous

      Post sugar.

      • 2 weeks ago
        Anonymous

        You east euros are just something else, no one can be that dumb.

        • 2 weeks ago
          Anonymous

          I'm still waiting for you to post sugar.

        • 2 weeks ago
          Anonymous

          Why did you contradict the image you posted, then?

    • 2 weeks ago
      Anonymous

      >Bottom of the barrel is always thicker
      Interesting how the cross section you posted doesn't actually show this. 🙂

      • 2 weeks ago
        Anonymous

        Why did you contradict the image you posted, then?

        and you look the barrel from the front bore is perfectly centered? it's a fucking magic and miracle, my god what is wrong with you all, how do you end up being this impaired?

        • 2 weeks ago
          Anonymous

          >and you look the barrel from the front bore is perfectly centered?
          Yes, during manufacturing you don't know which direction the barrel will be facing. You're a fucking cranial gimp, have some self respect and destroy your internet device.

          • 2 weeks ago
            Anonymous

            Offset is to prevent harmonic resonance, thing would tear itself apart without it.

            Are you crazy, barrel is conical.

            • 2 weeks ago
              Anonymous

              Just stop, remember what self-respect felt like. Fight to get it back.

              • 2 weeks ago
                Anonymous

                Self respect is some burger construct, coping mechanism when no one else respects you, basically masturbation just non-sexual.
                But yeah, I feel so lifeless, nothing interests me any more, it's all so shallow and meaningless.
                Think I'm gonna at least do a mall run to get some drinks and food now.

              • 2 weeks ago
                Anonymous

                Ain't nobody going to respect you if you don't respect yourself.
                Like this mindless rampage of stupidity you're on right now. Anyone with a modicum of dignity would have stopped a few posts ago, read the embarrassing trash they just posted, destroyed their computer and jumped off the roof.

        • 2 weeks ago
          Anonymous

          >and you look the barrel from the front bore is perfectly centered?
          Are you talking about any rifle barrel?
          Do you want me to take a picture of an Accuracy International barrel and will you then shut the fuck up?

  54. 2 weeks ago
    Anonymous

    >Could there be a reason to manufacture it like this?
    You people just don't understand glorious Soviet Manufacturing. I work at the Lima Army Tank Plant in Ohio Oblast, and we've begun trying to copy this technique from glorious Soviet engineers. This is why Soviet tanks are more accurate and have longer barrel life. Glory to the Sov...I mean, Slava Ukraine, my fellow Capitalist pig dogs!

  55. 2 weeks ago
    Anonymous

    I need Vodka to calm my hand comrade!

  56. 2 weeks ago
    Anonymous

    Why was the barrel cut in the first place, hmmm? Did they notice the inaccuracy from the exterior? That's implausible

    • 2 weeks ago
      Anonymous

      It never ceases to amuse, the vatnik rolling in its own shit and bragging about it.

      • 2 weeks ago
        Anonymous

        >literally doesn't know what quality control is

        • 2 weeks ago
          Anonymous

          Neither do Russians.

    • 2 weeks ago
      Anonymous

      I've been looking for a source. A quick google search reveals it just popped out out of no where all of a sudden and flooded random machinist and military forums with no source ever given. The posters are invariably those who post exclusively on the war.

  57. 2 weeks ago
    Anonymous

    >no information outside the uploader's description

    Always funny to see how people who say they are immune to propaganda, fall for propaganda.

    • 2 weeks ago
      Anonymous

      Post sugar

      • 2 weeks ago
        Anonymous
    • 2 weeks ago
      Anonymous

      >what information do you want?
      >just, like, uh, shut up khohol

  58. 2 weeks ago
    Anonymous

    >R*ssian quality

  59. 2 weeks ago
    Anonymous

    Im stupid, what ramifications does building a barrel like this have?

    • 2 weeks ago
      Anonymous

      Whatever you're shooting isn't shot in a straight line anymore, and it gets worse the further away your target is.

    • 2 weeks ago
      Anonymous

      Trash accuracy and precision. POI will dance around depending on how hot the barrel is. This is some pretty orcish tier metalwork.

    • 2 weeks ago
      Anonymous

      Basically nothing. Once it's zeroed in it doesn't matter if it's not concentric.

      • 2 weeks ago
        Anonymous

        We meant to hit that orphanage, comrade.

    • 2 weeks ago
      Anonymous

      >zeroing becomes pragmatically impossible
      >shots will wildly vary in precision; with a shitty gun you can still potentially compensate if you have an idea of what the pattern looks like, but with this there will be no pattern at all
      >anything that isn’t directly in front of you can be safely assumed to be not hit at all
      >all of these issues will be made even worse overtime as the barrel warps from the heat firing brings, and I am certain maintenance is the bare ass minimum at best

      • 2 weeks ago
        Anonymous

        >anything that isn’t directly in front of you can be safely assumed to be not hit at all
        Shocking!

        • 2 weeks ago
          Anonymous

          The difference is that with distance you can use a little bit of your brain to better aim and predict where things go, from the velocity of the object launched to the mechanism you used to launch it. That however requires proper machining and engineering which Russians have shown time and time again to be completely incapable of if they don’t have a foreign team doing all of the heavy lifting. If you had a precison rifle for example you can zero in large distances with a scope, specific ammo, and whatever barrel shit you have on to figure out how to get it to shoot where you want it to. That however requires precision levels of manufacture, which again they have not had in over 60 years. That may not have been much of a game changer in the age of mass volley fire, but nowadays when munition precision is everything its a total liability when their production is a fraction of what it once was due to no more Soviet states to leech off of. What is considered surplus and just a step beyond garbage or obsolete to the US/NATO is practically a space weapon from the far future to Russia.

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