Questions regarding to the performance of German 28cm guns

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cobralion
Junior Member
Posts: 10
Joined: Sun May 26, 2019 6:52 pm

Questions regarding to the performance of German 28cm guns

Post by cobralion »

Generally speaking my confusions are based on 3 documents:

Awa A IA 100/40 g.Kdos
Unterlagen und Richtlinien zur Bestimmung der Hauptkampfentfernung und der Geschosswahl

ADM 213/951
German steel armour piercing projectiles and theory of penetration
https://web.archive.org/web/2020012409 ... hive.html

and the excel created by Thorsten
https://www.kbismarck.org/forum/viewto ... 6&t=3291
www.kbismarck.org/GKdos100-Krupp-Durch ... rmel.xls

On Navweaps I seen the description that both SK28/C28 and SK28/C34 had actual caliber of 283 mm, if this is true why in Gercke-Tierberg formula, their caliber "D" were 28 (cm) and Bh, Bg value were 2.8 against homogeneous armor plates, considering the data of SK20,3/C34's 20.3(cm) for "D" and 2.03 for Bh and Bg against homogeneous armor plates?

What also puzzled me was in the 'Daten' sheet of the excel, it seemed like KMS Scharnhorst Gneisenau's main armament was named as 'SK28/C32' and for their Ch value of Psgr against cemented armor plates was 687? (While SK28/C28 has a Ch 685 and a same Cg 675 for Psgr against cemented armor.
Thorsten Wahl
Senior Member
Posts: 919
Joined: Mon Apr 27, 2009 4:17 pm

Re: Questions regarding to the performance of German 28cm guns

Post by Thorsten Wahl »

SK 28/C32 KC is a typing error
should mean SK 28/C34
and all values were preleminary values.
These values had to be adjusted to fit the Graphs
Meine Herren, es kann ein siebenjähriger, es kann ein dreißigjähriger Krieg werden – und wehe dem, der zuerst die Lunte in das Pulverfaß schleudert!
cobralion
Junior Member
Posts: 10
Joined: Sun May 26, 2019 6:52 pm

Re: Questions regarding to the performance of German 28cm guns

Post by cobralion »

Thorsten Wahl wrote: Mon Aug 16, 2021 10:33 am SK 28/C32 KC is a typing error
should mean SK 28/C34
and all values were preleminary values.
These values had to be adjusted to fit the Graphs
Thank you for your replies, I wish you will enjoy a good week.
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