In this case, regarding the 2A42 30 mm autocannon should be referred to 3UBR10, 3UBR8 and 3UBR11, respectively AP-T, APDS-T and APDS FS-T.
finding any data on 3ubr11 perfomance on a bmp2m is nigh impossible.
i found this but im not able to read well
and im pretty sure it might be about 3ubr8 and accuracy
From what I could find, XM811 is a experimental 40 mm HEI-T round,
do you speak russian?
I’m not on my computer at the moment, in one hour I might be able to get on-line and I can check the document better, maybe translating it to you.
It’s not that one. Seems like the designations clash. Might have been renamed / predecessor to M919, considering it did replace the M791 APDS in service.
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im not a native speaker but the little i understand seems to be talking about the accuracy of 3ubr8(presumably applies to 3ubr11 too) out of 2a42. though i dont understand anything besides a few terms so i would really appreciate if you looked into it later(if you want ofc)
From what I could understand, this document part of a collection regarding the improvements of the BMP-2’s firepower using 30 mm 3UBR8 APDS-T ammunition to substitute the 3UBR6 AP-T, the document is part of a test for improving the firepower, you can read the 2nd page at “Abstract”, it’s in english.
Not sure that technically possible increase accuracy from 1σ = 0.8, to 3σ = 0.77. More like is σ = 0.77 for new ammo.
Fair enough.
does it go into detail on any testing?
80cm max spread at 1km in high fire rate is actually really good.
They are two different shells produced by two different companies, potentially testing under different means / setups.
Also as cumulative measure it’s entirely possible it just means that there aren’t many outliers or any great variance.
Well, when you want to disperse a lot of HEI/HEI-F at a lot of soft targets that’s the ideal mode, but when engaging in longer ranges than ~750 meters on softly armored or armored targets low fire was almost always used, but if close range the high fire rate is more important to be brutally honest.
From 2015 training fire ranges for BMP-2 were increased from 1.5km to 1.9.km. I’m sure its linked with increased gun accuracy or new ammo.
Another goggl-translated news from 2022
In the Kaliningrad Region, motorized rifle unit servicemen have begun training in tactical-fire exercises (TOF) from BMP-2 infantry fighting vehicles, taking into account the experience gained not only in Syria, but also during the special military operation in Ukraine. In addition to the 30-mm automatic cannon and 7.62-mm machine gun, anti-tank guided missiles have been added to the means of destroying targets. Motorized riflemen now fire at emerging and moving targets in several ways at once, including frontally and “from the rear”. The firing range has been increased from 1,500 to 1,900 meters. A new type of target, “armored vehicle”, has been added to the existing target types “tank”, “infantry fighting vehicle”, “helicopter” and “infantry group”. The target display is determined by the firing supervisor depending on the training and tactical situation created during field training.
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i remember in your original thread we talked about it but it does appear like the cannon might produce significant vapor/smoke in the right enviromentals, did you stumble upon anything regarding that since then?
Very, very unlikely
You do get that quality control exists as an entire field of engineering, yes?
Haven’t looked into it to be honest, I could, but also ask segment because he said something about new ammo and firing distances, which might correlate with gun smoke.
anybody took a look to the the patent yet?