Naval History Forums

Thank you very much for solving my confusion

Emergent news update, Russian troops started attacking Mariupol, if they succeed for taking the city, they may be able to cut the back routes of Ukraine armies in Donbass.

Pray for Ukraine fighters.

I want to put some wordy personal comments about Biden administration's strategical decisions here: Talking about Biden's strategical decisions, I still remember a funny meme that showed USA sanctioned Russia and still let money flow to communist China, and communist China let money flow to Russia. ...

The current situation is very tricky, first let's go to the current battle state of Ukraine. Russian attacks were progressing on eastern and southern fronts, but they faced strong Ukraine resistance, and seemed like they failed to take Kharkiv and Kherson. The first wave of airborne Russians troops ...

I have to apologize to everyone that due to schedule issue the work is still incomplete. The complete Gercke-Tierberg formula from ADM 213/951: D: shell caliber (cm) G: shell weight (kg) V: striking velocity (m/s) a: angle of incidence between trajectory and plate (degree) S: plate thickness (dm) V ...

I will post some personnal use of Gercke-Tierberg formula from ADM 213/951 here: Original state of Gercke-Tierberg formula: V = C * (D/G)^0.5 * S^0.8 / (sin a)^m m = 0.5 + Bx x = (D/G)^0.5 * S^0.8 Conversion to C: C = V * (G / D)^0.5 * (sin a)^m / S^0.8 For normal attack, a = 90 degree: C = V * (G /...

While calculating the performance of SK20.3/C34 based on ADM 213/951, it seemed like there is a mistake of its Cg value. On ADM 213/951, SK20.3/C34 was suggested to have a Cg value of 675 for Psgr against KC, however, comparing to Ch value of 650 for Psgr against KC, on graph against same thickness ...

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.

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/20200124093901/http://b...

Take three examples: Example 1: Awa A IA 100/40 g.Kdos Unterlagen und Richtlinien zur Bestimmung der Hauptkampfentfernung und der Geschoßwahl Example 2: B. Nr. 1. SkI. I Op. 410/41 Gkdos Chefs. Seekriegsleitung Operation Order for Rheinübung https://www.kbismarck.com/rheinubung-operation-order.html ...