Iraqi errors report - Part 2

[EJ]

Don,
You are welcome. I'll try to keep reading your post and keep contributing with info like the above. Glad to help contribute!

[redcoat2]

I've just quickly looked up the 100 mm rounds in question in the Jane’s Ammunition Handbook. It isn’t particularly good for ‘older’ ammunition but here are a few quotes from the book.

Originally Posted by DRG

Marcello, do you have any idea when BR-412B APBC and BR-412 APCBC were first produced and distributed ? All I've found so far is a vague reference to a time period right after WW2. In game terms the Pen for BR-412B should be 18 ( I have a number of weapons being adjusted in this next patch and this just happens to be one of them ) , BR-412"D" APCBC should be 22 but It would be helpful if anyone knows then these things started being issued. Stock BR-412 would be 16 pen in game based on detailed info I found on it's performance and the B and D versions at 500, 1000, 1500, 2000 and 3000 yards and that means there will be adjustments to SPWW2 as well

"For many years the 100 mm AP-T 53-BR-412 and its improved variant the AP-T 53-BR-412B, were the main anti-armour projectiles fired from D-10 series tank guns. The 53-BR-412 was introduced into service together with the D-10 gun, while the 53-BR-412B first appeared during the 1950s and replaced the earlier model."

"The 53-BR-412 can penetrate 135 mm of vertical armour at 1,000 m and the 53-BR-412B penetration at the same range is 185 mm."

Originally Posted by DRG

For HEAT I have 100mm BK-5M with 380mm Pen issued " in mid 50's " but I also have source that says BK-5M was issued in 1960. The round before that I have as BK-354M HEAT with 280mm pen but I've also seen that described as BK-5., If anyone knows when BK-5M was first issued that would be helpful

"The 100 mm HEAT-FS BK-5 projectile was first issued during the 1950s. In its later BK-5M form it was carried by many T-54/T-55 tank units as a small proportion of the combat load, usually only three rounds out of a total load of 34 (T-54) or 43 (T-55). The BK-5M has been referred to as the ZBK-5M, although the complete round designation is 3UBK-4."

"The 100 mm HEAT-FS BK-5M has a muzzle velocity of 900 m/s. Although it can penetrate up to 380 mm of armour set at 0º and 190 mm set at 60º, it has been calculated that the hit probability against a static tank sized target at 1,000 m is only 43 per cent. At 2,000 m the hit probability is reduced to a negligible 2 per cent."

Originally Posted by DRG

As for BM-8 APDS I have that showing up in 1968 with penetration rated between 257 mm and 264 @ 1km and in game terms we get a closer representation with a 31 pen and 90 range
Since everyone looks for inconsistencies that may exist between one weapon in other OOBs and given that this gun is used in dozens of OOB's There are adjustments that need to be done in quite a few plus SPww2.

"The 100 mm HVAPDS-T UBM-6 was the main anti-armour round used by D-10 series guns from about 1968 onwards. It fired the main anti-armour projectile for the D-10 gun series until the belated introduction of the 100 mm APFSDS 3BM-2 projectile and its equivalents."

"The 100 mm HVAPDS-T BM-8 has a muzzle velocity of 1,400 to 1,415 m/s and is claimed to be able to penetrate 300 mm of vertical armour at the maximum effective direct fire range of 1,680 m."

[Marcello]

The 53-BR-412 was introduced into service together with the D-10 gun, while the 53-BR-412B first appeared during the 1950s and replaced the earlier model.

I strongly suspect it may be a case of obsolete Cold War era info that nobody has bothered to verify.