Search found 87 matches

by hans zurbriggen
Sat May 23, 2020 6:38 pm
Forum: Naval Technology
Topic: Nagato protection
Replies: 38
Views: 2372

Re: Nagato protection

Hello, to Marcelo Malara writing: "What surprises me is the thickness of the horizontal protection". I do not know if values reported are correct. My notes (unfrotunately I don't have the source) say: 1) weather deck in total 25 mm 2) upper armor deck 25+25+19 and 3) lower armor deck 51 mm total ove...
by hans zurbriggen
Tue Apr 21, 2020 12:59 pm
Forum: Bismarck General Discussion
Topic: Comment on Rebuilt US Battleships
Replies: 13
Views: 1117

Re: Comment on Rebuilt US Battleships

Hello Mr.RobertsonN, I 100% agree: requirements for TDS were quickly evolving but Germans provided increasing TDS width from 4.7 (Scharnhorsts) to 5.5 meters (Bismarcks). Was it enough ? Difficult to say. Requirements for 6 meters width were recommendations: I remember the Scharhorst belt was initia...
by hans zurbriggen
Tue Apr 21, 2020 7:54 am
Forum: Bismarck General Discussion
Topic: Comment on Rebuilt US Battleships
Replies: 13
Views: 1117

Re: Comment on Rebuilt US Battleships

Hello Mr.RobertsonN, I agree both layouts had their pros and cons. However Scharnhorsts had no additional TDS layer compared to Bismarcks. The 'wing compts' were 100% vital compartments (boiler auxiliary machinery and electrical plants), not intended to provide additional defense to boiler rooms. Bo...
by hans zurbriggen
Mon Apr 20, 2020 9:21 pm
Forum: Bismarck General Discussion
Topic: Comment on Rebuilt US Battleships
Replies: 13
Views: 1117

Re: Comment on Rebuilt US Battleships

Hello, to RobertsonN writing: "The 14 in hit on Bismarck from POW that went under the belt would probably not have flooded a boiler room but just the wing compartment." not sure of this: according to survivors, PoW hit exploded against the 45mm Ww torpedo bulkhead (5.5 meters TDS wide). On Scharnhor...
by hans zurbriggen
Mon Apr 20, 2020 2:08 pm
Forum: Bismarck General Discussion
Topic: Comment on Rebuilt US Battleships
Replies: 13
Views: 1117

Re: Comment on Rebuilt US Battleships

Hello, to Mr.RobertsonN writing: "...It has been said that width was determined by the sum of machinery width + torpedo defense width. But the Scharnhorst was only slightly less powerful and had a side protection system of the same nominal value, but that ship was only 30 m wide. The overall length ...
by hans zurbriggen
Tue Apr 14, 2020 1:05 pm
Forum: Bismarck General Discussion
Topic: A correct attribution for the "Flash Effect" photo?
Replies: 343
Views: 18399

Re: A correct attribution for the "Flash Effect" photo?

Hello Kev D,
sorry for acronyms: your understanding is correct. GO = Gunnery Officer = A.Schneider for BS.

hans
by hans zurbriggen
Tue Apr 14, 2020 7:19 am
Forum: Bismarck General Discussion
Topic: A correct attribution for the "Flash Effect" photo?
Replies: 343
Views: 18399

Re: A correct attribution for the "Flash Effect" photo?

Hello to Mr.Angel writing: "...this suggests to me that Bismarck may possibly have just fired a "gabelgruppe" (forking group) with a very short interval between the salvo discharges.": I do agree with the analysis of the smoke. They look like all 4 turrets have fired almost together (slightly in adv...
by hans zurbriggen
Mon Apr 13, 2020 10:55 am
Forum: Bismarck General Discussion
Topic: A correct attribution for the "Flash Effect" photo?
Replies: 343
Views: 18399

Re: A correct attribution for the "Flash Effect" photo?

Hello Kev D, mine in blue below: 1) Bismarck is for first time on Prinz Eugen port side during battle this points to just after the "flash effect" (when BS is crossing PG wake, passing from her starboard side to port side), as discussed. So just to clarify that I understand you correctly i.e. 'Bisma...
by hans zurbriggen
Mon Apr 13, 2020 7:39 am
Forum: Bismarck General Discussion
Topic: A correct attribution for the "Flash Effect" photo?
Replies: 343
Views: 18399

Re: A correct attribution for the "Flash Effect" photo?

Hello, to Kev D writing: "is the photo below 1) Actually from some time during that battle? 2) And if so, when, i.e. where in the timeline so to speak (say as compared to the 'flash effect photo' that was the subject of this thread)? 3) Or if not from that battle, then when?": 1) Bismarck is for fir...
by hans zurbriggen
Sat Apr 04, 2020 7:23 am
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 35
Views: 1852

Re: Wind Behavior: 0400 - 0600

Hello, to Mr.Malara writing: "15/20 kt seems plausible." Thanks to Mr.malara for the calculation. However, looking at Beaufort wind scale (Wiki link: https://en.wikipedia.org/wiki/Beaufort_scale), 15 -20 knots do not match at all what we see in the images (photos and film from PG). 'White Horses' ar...
by hans zurbriggen
Fri Apr 03, 2020 11:46 am
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 35
Views: 1852

Re: Wind Behavior: 0400 - 0600

Hello, thanks to Mr.Malara for the meteo charts, They point to a probable NE wind (as per first battlemap from F.O.Busch). I see your point about wind in a low pressure area. I hope someone can find the wind in UK / Iceland that day. However, looking at PG film and photos, we don't get any feeling o...
by hans zurbriggen
Thu Apr 02, 2020 10:49 am
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 35
Views: 1852

Re: Wind Behavior: 0400 - 0600

Hello, British Ships Logs report Wind at:
04:00 as North force 4 (Prince of Wales), North force 5 (Norfolk), NNE force 7 (Suffolk)
08:00 as North force 4 (PoW), North force 5 (NF), SW force 3 (SF).
Confusion here as well.

hans

edit: just saw Mr.Dunmunro entry. Sorry for duplicate info at 04:00
by hans zurbriggen
Fri Mar 13, 2020 9:03 am
Forum: Books and Reference
Topic: Acorazados de la segunda guerra mundial
Replies: 9
Views: 2450

Re: Acorazados de la segunda guerra mundial

Hello jabeque,
congratulations. Very nice work, filling a gap in existing books. Drawings allow to compate battleship protection in way that is easy to understand.
I will get the book! Can you please tell us whether Amazon is the best way to order it ?

hans
by hans zurbriggen
Thu Feb 27, 2020 9:10 am
Forum: Hypothetical Naval Scenarios
Topic: French navy taken over by the kreigsmarine
Replies: 17
Views: 1401

Re: French navy taken over by the kreigsmarine

Hello, I agree with both Mr. Wadinga and Mr. Saxton analysis. I think Hitler should have forced Franco to war before or instead of attacking USSR. He really did not understand sea power importance. Gibraltar and Malta should have been neutralized immediately. This would have made position of Alexand...
by hans zurbriggen
Fri Feb 21, 2020 8:14 am
Forum: Off Topic
Topic: Treason
Replies: 2
Views: 1179

Re: Treason

Hello, I agree with Mr. Angel. True treason (masked by pseudo humanitarian reasons) was committed at much higher levels and in all countries. Motive was to favour immigration in order to lower labor cost (thus our own salaries, a double treason). Traitors were financial powers, more than politic rep...