Search found 91 matches

by hans zurbriggen
Mon Feb 15, 2021 12:40 pm
Forum: Books and Reference
Topic: Anatomy of the Ship Scharnhorst - Stefan Draminski
Replies: 1
Views: 239

Anatomy of the Ship Scharnhorst - Stefan Draminski

Hello, I have got and read AotS for Scharnhorst from Mr.Draminski. The book was written using good references, consulting most knowledgeable people and result is, in my poor opinion, excellent. Again more technicalities would have been welcome, but the evolution of the aspect of the ship is incredib...
by hans zurbriggen
Mon Feb 01, 2021 8:23 am
Forum: Books and Reference
Topic: Anatomy of the Ship Iowa/Stefan Draminski
Replies: 27
Views: 2586

Re: Anatomy of the Ship Iowa/Stefan Draminski

Hello Mr.bigjimslade, usually cats are instinctively right, but which technical book on Bismarck does they like ? Jack Brower's AOTS is even less technical and mostly incorrect about ship's aspect. Koop-Schmolke is a must, but it is too generic, by now much outdated and not free of errors. You alrea...
by hans zurbriggen
Fri Jan 29, 2021 8:32 am
Forum: Books and Reference
Topic: Anatomy of the Ship Iowa/Stefan Draminski
Replies: 27
Views: 2586

Re: Anatomy of the Ship Iowa/Stefan Draminski

Hello Mr.bigjimslade, same applies for Bismarck, with outdated technical books or recent generic repetitions.
I think Mr.Draminski book is by far the best available today for Bismarck layout and aspect.

hans
by hans zurbriggen
Mon Jan 25, 2021 8:12 am
Forum: Books and Reference
Topic: Anatomy of the Ship Iowa/Stefan Draminski
Replies: 27
Views: 2586

Re: Anatomy of the Ship Iowa/Stefan Draminski

Hello, I don't have the Iowa AoS. I have Mr.Draminski's Bismarck AoS book (and waiting for Scharnhorst one): while I agree it's more an aspect and internal anatomy (layout) book then a true technical text, I consider it a very good book, mostly for Bismarck aspect in different periods of her life. M...
by hans zurbriggen
Sun Sep 20, 2020 8:07 am
Forum: Bismarck General Discussion
Topic: Two captains on Rodney
Replies: 4
Views: 497

Re: Two captains on Rodney

Hello Mr.Mercer, you can find Captain Coppinger remarks enclosed to Rodney report in Admiral Tovey official despatches on Bismarck operation (ADM 234-509) at page 122. Also, you are right, there was another US Navy officer on board, J.H.Wellings, who wrote "On His Majesty's Service", covering also B...
by hans zurbriggen
Thu Aug 06, 2020 5:06 pm
Forum: Bismarck General Discussion
Topic: Was the battleship Bismarck really the best of its time?
Replies: 34
Views: 2582

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

Hello Mr.Wahl, may I ask you where is the very interesting document you have posted above coming from and when was it written ?
Many thanks in advance
hans
by hans zurbriggen
Mon Jul 20, 2020 1:44 pm
Forum: Bismarck General Discussion
Topic: Robert J. Winklareth +
Replies: 5
Views: 1124

Re: Robert J. Winklareth +

Hello, Robert's theory was never very popular here, still he has produced a full reconstruction of DS battle that is worth of consideration.

R.I.P.

hans
by hans zurbriggen
Thu May 28, 2020 7:50 am
Forum: Naval Technology
Topic: Nagato protection
Replies: 38
Views: 2557

Re: Nagato protection

Hello Mr. Mostlyharmless, point I had made is that merely adding a layer of armour over another, does not add much extra protection (e.g. the tumb formula: multiple thicknesses of steel are equivalent to square root of the sum of the squared single thicknesses). Weak points (e.g. due to discontinuit...
by hans zurbriggen
Wed May 27, 2020 10:16 pm
Forum: The Dreadnought Era (1906-1921)
Topic: Kaiserliche Marine sailors quarters
Replies: 6
Views: 1752

Re: Kaiserliche Marine sailors quarters

Hello Marcelo, I do not have a confirmation for the fact that crew slept ashore during WWI. I have another 'negative confirmation': for their new battleships, German designers paid great attention to crew acomodation on board. During Bismarck design, it was even imagined to shorten the citadel belt ...
by hans zurbriggen
Tue May 26, 2020 8:03 pm
Forum: Naval Technology
Topic: Nagato protection
Replies: 38
Views: 2557

Re: Nagato protection

Hello, I agree with Mr.Jurens consideration about structural elements and I would add that in case of Bismarck's, Nelson's and Littorio's (plus of course Nagato's), having also a third deck between the 2 armor decks, this adds thickness and other structural elements to be 'defeated'. Also, the subdi...
by hans zurbriggen
Tue May 26, 2020 12:38 pm
Forum: Naval Technology
Topic: Nagato protection
Replies: 38
Views: 2557

Re: Nagato protection

Hello, to Mr.Dunmunro writing: ". ..your stubbornness in refusing to acknowledge the totality of KGV's deck... " I am extremely disappointed to see these kind of personal comments, especially as I would have so much to say regarding the same attitude from your side. I have no problem admitting my mi...
by hans zurbriggen
Tue May 26, 2020 8:17 am
Forum: Naval Technology
Topic: Nagato protection
Replies: 38
Views: 2557

Re: Nagato protection

Hello Mr. Dunmunro, you write: " it states a Brinell value of 170 for 'D' steel. ": only for post WWII D steel, not KGV one. and: " ...compares very well with the average nickel-steel armour given in the same table ": table refers to 1890-1925 steels (WWI), not the nichel-chrome-molibdenum WWII (e.g...
by hans zurbriggen
Mon May 25, 2020 9:52 pm
Forum: Naval Technology
Topic: Nagato protection
Replies: 38
Views: 2557

Re: Nagato protection

Hello Mr.Dunmunro, I am afraid I have given you the values of tensile strength demonstrating that D steel cannot be considered even close to an armor grade steel, the same concept Mr.Wahl explained to you. ST52 steel (the one used for mere hull plating of Bismarck) had hardness of 150 Brinell and te...
by hans zurbriggen
Mon May 25, 2020 10:57 am
Forum: Naval Technology
Topic: Nagato protection
Replies: 38
Views: 2557

Re: Nagato protection

Hello, to Mr. Dunmunro writing: " .0805 calibre plate thickness begin to be effective for decapping at high obliquity" Another interesting aspect on which we can agree to disagree: it surely depends on obliquity, but other sources speak of up to almost 0.2 calibers to get de-capping at 90° impact an...