Search found 735 matches

by Thorsten Wahl
Thu May 11, 2017 1:13 pm
Forum: Naval Weapons
Topic: American SH shells - Famed or Folly
Replies: 33
Views: 7584

Re: American SH shells - Famed or Folly

I'm sorry - made a typing error typed 6 instead of 5 magazine protection 150 mm total thickness; 50 mm (whether deck) + 100 mm (armor deck) from official drawing Amt für Kriegsschiffbau "Schlachtschiff F gültig nur für Panzerdicken" link (zoomable) https://photos.google.com/photo/AF1QipO82BtrPgEgBKe...
by Thorsten Wahl
Tue May 09, 2017 3:23 pm
Forum: Naval Weapons
Topic: American SH shells - Famed or Folly
Replies: 33
Views: 7584

Re: American SH shells - Famed or Folly

> The fact that Bismarck's vertical protection scheme was deemed to be technically proof against almost any battleship gun afloat at any range in terms of a projectile piercing and reaching her vitals at short ranges suggests that perhaps USN designers were on the right track. In the event, the per...
by Thorsten Wahl
Tue May 09, 2017 11:30 am
Forum: Naval Weapons
Topic: American SH shells - Famed or Folly
Replies: 33
Views: 7584

Re: American SH shells - Famed or Folly

both shells wer fired using the same energy at the muzzle (about 300 MJ) expected result at 24 kyard Shell ----AOF---- Speed ----flightime --nominal single plate penetration 2240lb---22°---- 1538 fs ---38,8 s ~4,5 Inch deck pen, ~14,5 Inch vertical pen 2700lb---23,8°-- 1533 fs ---41,2 s ~5,5 Inch de...
by Thorsten Wahl
Tue May 02, 2017 4:15 pm
Forum: Hypothetical Naval Scenarios
Topic: Bismarck and Iowa
Replies: 49
Views: 14699

Re: Bismarck and Iowa

@spicmart: Bismarck's torpedo defense system was rated to withstand 250kg of TNT, expectation was that damage inwards of the TDS from larger explosions would be contained rather than prevented - Bismarck featured extensive subdivision. The rating seems quite conservative; German assumptions of the ...
by Thorsten Wahl
Tue May 02, 2017 12:27 pm
Forum: Bismarck General Discussion
Topic: Yaw deck?
Replies: 12
Views: 5819

Re: Yaw deck?

American tests during WW2 of some spaced array systems indicated that yaw could provide as much as a + 30% enhancement of effective thickness in some cases. during and after WW2 -30% enhancement - complete description W. Hurlich; Spaced Armor 1950 http://oai.dtic.mil/oai/oai?verb=getRecord&metadata...
by Thorsten Wahl
Tue Apr 18, 2017 12:15 pm
Forum: Bismarck General Discussion
Topic: Regarding Hood at DS : a new article
Replies: 11
Views: 10145

Re: Regarding Hood at DS : a new article

Their magazines and shell rooms were transposed from Hood, a significant alteration. There was good reason for this major alteration. what was the reason? The Germans went the other way: They explicitely decide to retain the powder chambers above the shell rooms with the Linienschiff 1913(Baden) de...
by Thorsten Wahl
Thu Apr 06, 2017 9:31 am
Forum: Hypothetical Naval Scenarios
Topic: Alaska Class vs Dunkquerke Class
Replies: 24
Views: 8190

Re: Alaska Class vs Dunkquerke Class

Between 22000 and 31000yd, KGV immune while Tirpitz vulnerable to 14" deck hits. This recommendation was overtaken past 1945/46 when the protective value of the german horizontal protection(50 mm + 80 mm) was evaluated with about 6 ". No british naval gun/shell in service at this time could perfora...
by Thorsten Wahl
Thu Apr 06, 2017 9:11 am
Forum: Bismarck General Discussion
Topic: Ian Ballantyne's views on Bismarcks distruction
Replies: 15
Views: 8914

Re: Ian Ballantyne's views on Bismarcks distruction

even this is from Preston "All the communications, electical power, telemotor leads and boiler uptakes were above the low-armored deck, and enemy gunfire had shredded everything except the main machinery within minutes." The power supply of the ship was made from 4 independent main circuits, the mai...
by Thorsten Wahl
Tue Feb 14, 2017 9:56 am
Forum: Hypothetical Naval Scenarios
Topic: Alaska Class vs Dunkquerke Class
Replies: 24
Views: 8190

Re: Alaska Class vs Dunkquerke Class

Dunkerque had a large unprotected bow. Even the relatively much smaller forward spaces of Bismarck cause considerable problems by flooding, when riddled, despite extensive compartmentalisation.
by Thorsten Wahl
Wed Feb 08, 2017 11:07 am
Forum: Hypothetical Naval Scenarios
Topic: Bismarck and Iowa
Replies: 49
Views: 14699

Re: Bismarck and Iowa

im not sure about "consistently scoring hits" as the KTB from the Admiral Kanalküste mostly states "Erfolg nicht beobachtet" -"success not observed", except you have informations about gunfire damage on british ships available. sample 0266.jpg but as a result, these shootings led to ceasing of the b...
by Thorsten Wahl
Mon Feb 06, 2017 1:22 pm
Forum: Hypothetical Naval Scenarios
Topic: Bismarck and Iowa
Replies: 49
Views: 14699

Re: Bismarck and Iowa

scoring hits at such ranges due to ballistic reasons
another problem is the flight time

at 25 km fligthtimes of shells are in the order of 40+ seconds
at 30 km round about 55+ seconds.

Ample of time for the target to change course.
by Thorsten Wahl
Mon Feb 06, 2017 1:04 pm
Forum: Bismarck General Discussion
Topic: Jasper, Schmalenbach and 6 salvos...
Replies: 596
Views: 55105

Re: Jasper, Schmalenbach and 6 salvos...

Exactly ! For example, did you know that in reality HMS Hood opened fire from 290hm ? It's written in Prinz Eugen's war diary - it can't be mistaken for sure. This could be a numbers twist. Possibly 209 hm =20,9 km wich is roughly 24 k Yard. And the 290 hm number possibly refers to the first detect...
by Thorsten Wahl
Thu Jan 05, 2017 3:53 pm
Forum: Bismarck General Discussion
Topic: Bismarck immunity zone
Replies: 31
Views: 9933

Re: Bismarck immunity zone

the thick part of Bismarcks barbettes did not end at the whether deck. It reaches until about 50 cm below that deck. --------------------------------------------------------------------------------------------------------------- "There is a possibility of the wheter deck being 80 mm thick around the...
by Thorsten Wahl
Thu Jan 05, 2017 3:43 pm
Forum: Hypothetical Naval Scenarios
Topic: Hood v Vittorio Veneto
Replies: 560
Views: 42246

Re: Hood v Vittorio Veneto

What an arrogant response, totally over the top and totally unnecessary. Sorry it was not my Intention to sound arrogant or harsh. :oops: I dont know the "Millington-Drakes compendium". So it would be useful for me to get more details. Your additional information has some vague but possible useful ...
by Thorsten Wahl
Thu Jan 05, 2017 10:24 am
Forum: Bismarck General Discussion
Topic: Bismarck immunity zone
Replies: 31
Views: 9933

Re: Bismarck immunity zone

hits against turrets and barbettes likely cause shock damage and requires immediate and accurate evaluation. When doubts arose, about the further viability, the equipment concerned, was not used until dockyard inspection. As happend with South Dakota. They didnt use the turret, wich was hit but not ...