Search found 780 matches

by Thorsten Wahl
Mon May 10, 2021 9:52 am
Forum: Naval Weapons
Topic: Plunging fire
Replies: 22
Views: 18953

Re: Plunging fire

With regard to the splitted arrangement. Not every splitted arrangement of deck protection may reach the same or better results of ballistic protection as a single plate of same total thickness. British ballistic research gave requirements for the positive case 1) detachment of armor piercing cap (A...
by Thorsten Wahl
Mon May 10, 2021 7:37 am
Forum: Naval Weapons
Topic: Plunging fire
Replies: 22
Views: 18953

Re: Plunging fire

The test was obviously done with 40,6 cm /1030 kg APC (Psgr) as the AOf data is only conform with the 40,6 cm projectile (the 38 cm projectiles reach 27 degrees AOF at about 27 km) Which was the range (if any) under which the belt/slope combination could be defeated according to these tests ? test a...
by Thorsten Wahl
Mon May 10, 2021 6:44 am
Forum: Naval Weapons
Topic: Plunging fire
Replies: 22
Views: 18953

Re: Plunging fire

In the context of the evaluation of the horizontal protection "Battleship H", fears were expressed, that the horizontal protection consisting of a 50 mm upper deck and 100 mm armored deck could already penetrated at angles of fall of 15 ° - 25 ° (corresponding to a distance of at least around 20 km)...
by Thorsten Wahl
Sun Apr 18, 2021 12:19 pm
Forum: Bismarck General Discussion
Topic: bismark-after torpedo hit
Replies: 203
Views: 13807

Re: bismark-after torpedo hit

Given the informations we have from the last battle, the behavior of the ship at given certain wind conditions(without using rudder) and a considerable ruddereffect by the remains of the rudders, the ship had only limited steering abilities agains t the main wind/wave direction by changing individua...
by Thorsten Wahl
Sun Apr 11, 2021 5:40 pm
Forum: Bismarck General Discussion
Topic: bismark-after torpedo hit
Replies: 203
Views: 13807

Re: bismark-after torpedo hit

double post
by Thorsten Wahl
Sun Apr 11, 2021 2:37 pm
Forum: Bismarck General Discussion
Topic: bismark-after torpedo hit
Replies: 203
Views: 13807

Re: bismark-after torpedo hit

The astern turbines on board Bismarck were rated for 190 shaft RPM at the cost of full power steam consumption.

270 shaft RPM forward were good for ~30kn.
by Thorsten Wahl
Sun Apr 11, 2021 2:37 pm
Forum: Bismarck General Discussion
Topic: bismark-after torpedo hit
Replies: 203
Views: 13807

Re: bismark-after torpedo hit

The astern turbines on board Bismarck were rated for 190 shaft RPM at the cost of full power steam consumption.

270 shaft RPM forward were good for ~30kn.
by Thorsten Wahl
Wed Apr 07, 2021 6:38 am
Forum: Bismarck General Discussion
Topic: bismark-after torpedo hit
Replies: 203
Views: 13807

Re: bismark-after torpedo hit

M.R. s account is valuable as he exists. It gives unse some overview about the ship from a "resident". But in its reliability it appears sometimes as questionable. He was POW for a longer time, then he was on board Bismarck. It had been a also very long time until he wrote his book and seemingly the...
by Thorsten Wahl
Sat Apr 03, 2021 12:20 pm
Forum: Bismarck General Discussion
Topic: Was the battleship Bismarck really the best of its time?
Replies: 4
Views: 390

Re: Was the battleship Bismarck really the best of its time?

From own post Warships are complex machines. There are numerous variables and relationships that may affect the outcome of a battle. Influence of random events is far too great, to predict the outcome of one particular battle. And in realtiy it appears possible that even a weaker appearing ship may ...
by Thorsten Wahl
Mon Dec 14, 2020 1:54 pm
Forum: Bismarck General Discussion
Topic: Various Q's regarding fire control tools
Replies: 8
Views: 658

Re: Various Q's regarding fire control tools

the screens are

Entfernungsänderung -rate change
Seitenänderung -deflection(bearing) change

Skizze aus Paul Schmalenbach Geschichte der deutschen Seezielartillerie
Funkmess ergänzt durch mich
Feuerleitanlage.JPG
(126.62 KiB) Not downloaded yet
by Thorsten Wahl
Thu Dec 10, 2020 2:12 pm
Forum: Books and Reference
Topic: Best Books on Jutland?
Replies: 11
Views: 1322

Re: Best Books on Jutland?

The Battle of Jutland Bank, May 31 to June 1, 1916 the dispatches of Admiral Sir John Jellicoe and Vice-Admiral Sir David Beatty (1916) 100 pg The Battle of Jutland The Sowing and the Reaping by Commander Carlyon Bellairs, M.P. ~350 pg What happened at Jutland,Commander C.C. Gill U.S. Navy ~200 pg B...
by Thorsten Wahl
Tue Dec 08, 2020 12:23 pm
Forum: Hypothetical Naval Scenarios
Topic: Vanguard and Bismarck
Replies: 88
Views: 33577

Re: Vanguard and Bismarck

Around 1923/25 most armor piercing shells had problems staying intact against ca 0,7 cal FH-armor at 30 degrees.
So the NelRod armor design evolved around this projectile behavior with some margin.

End of thirties shells were better.
by Thorsten Wahl
Sat Nov 28, 2020 12:02 pm
Forum: Bismarck General Discussion
Topic: (No) Fuelling about in Grimstadfjord?
Replies: 4
Views: 450

Re: (No) Fuelling about in Grimstadfjord?

I suspect Bismarck was filled up to the top in the beginning including reserve fuel/trim tanks in the bow(Öl- Sonderzuladung 1000/2000 t.) This "additional" fuel oil could be used up first. Allowing Bismarck to start at Grimstad fjord with around the nominal 7700 m³ fuel oil even without refueling. ...
by Thorsten Wahl
Tue Oct 20, 2020 8:46 am
Forum: Naval Weapons
Topic: Torpedo angle of attack
Replies: 19
Views: 1444

Re: Torpedo angle of attack

Depth rudders