German OOB 16: minor corrections

[Cross]

Originally Posted by Mario_Fr

Looking at all the different numbers it seems that there are two different opinions.

First: KwK L43 and KwK L48 actually have the same pen-data using the same shell but Pak 40 has slightly better penetration (as stated by Fleischer, tarrif.net and Rexford Bird / Livingston (they even distinguish between the three of them but KwK L43 and L48 have only 2mm difference: KwK 40 L43-133mm; L48-135mm; Pak 40-146mm for 100m)

Second: no difference between KwK L48 and Pak 40 but KwK L43 has slightly less penetration (as it is in the game right now).

To be honest, I only knew the first opinion before, that Pak 40 has slightly better penetration. Official documentation is out of reach, but maybe someone can come up with it.

Mario

The info I have shows this:

APCBC at 1,000 yds 30deg

StuK 40.......72mm (US Army Tech Manual 1945)
KwK 40 L43....72mm (Bovington Tank Museum)
KwK 40 L48....79mm (Bovington Tank Museum)
PaK 40.......102mm (US Army Tech Manual 1945)

NB. The US Army tech manual says there was no change in ballistic characteristics of the KwK 40 L43 and L48.

My 'Bovington' doc. (a friend gave it to me and said it came from Bovington) No idea what book or publication.









Cross

[Mario_Fr]

But the sheet VII-58 also gives a penetration of 72mm for 1000 yards for the L48 (right column, topic remarks).

in: ... 945.StuK40.jpg

Mario

[cbo]

Everybody, his uncle and his sons dog have figures for these guns and you can quote from the now until the end of history without really solving the issue. The solution to the problem lies, unfortunately, in the primary sources, i.e. those produced in context with the firing test, calculations and estimations of performance. And as far as I know, no one have managed to find anything conclusive on the matter of the many different muzzle velocities registered for these guns.

I dont want to discourage discussion, that always turns up some interesting snippets of information, but the issue of muzzle velocity is complex (conditions of test, propellant used, age and condition of ammunition used etc.) and the issue of penetration on top of that much more so.

But as long as the differences between figures amounts to less than 10%, it hardly matters in game terms.