Search found 3978 matches

by dunmunro
Mon Nov 23, 2020 8:58 pm
Forum: Bismarck General Discussion
Topic: Black objects ingrimstg Fjord
Replies: 4
Views: 90

Re: Black objects ingrimstg Fjord

The 2nd photo look like a paravane, which were used to sweep for mines.
by dunmunro
Sat Oct 03, 2020 10:08 pm
Forum: Bismarck General Discussion
Topic: Bismarck final battle and German main battery accuracy Qs.
Replies: 29
Views: 2745

Re: Bismarck final battle and German main battery accuracy Qs.

The problem with penetrating armor into her engineering spaces was that it's very difficult to get underwater hits at close range. At low trajectories the shells tend to leave the water again after initially hitting it. Also, the Bismarck armor combination of belt and scarp is theoretically almost ...
by dunmunro
Sat Oct 03, 2020 9:04 pm
Forum: Naval Technology
Topic: Tonnage and Displacement
Replies: 16
Views: 12582

Re: Tonnage and Displacement

Thanks Steve. I' m still not sure of how anyone is going to actually check whether or not any extra tonnage had been added, it seems the both Bismarck and Tirpitz as well as the two Yamato's were constructed way over the Treaty limits - as I believe were the French, Italian and US ships without any...
by dunmunro
Sat Oct 03, 2020 8:54 pm
Forum: Bismarck General Discussion
Topic: Bismarck final battle and German main battery accuracy Qs.
Replies: 29
Views: 2745

Re: Bismarck final battle and German main battery accuracy Qs.

Mostlyharmless wrote:
Sat Oct 03, 2020 5:13 pm
dunmunro wrote:
Sat Oct 03, 2020 4:35 am
Well something was causing Bismarck to have an increasing list to port, that was clearly visible to RN observers.
Did Rodney hit Bismarck with a torpedo exploding amidships on the port side?
it seems unlikely based upon survivor accounts and wreck surveys.
by dunmunro
Sat Oct 03, 2020 8:53 pm
Forum: Bismarck General Discussion
Topic: Bismarck final battle and German main battery accuracy Qs.
Replies: 29
Views: 2745

Re: Bismarck final battle and German main battery accuracy Qs.

The problem with penetrating armor into her engineering spaces was that it's very difficult to get underwater hits at close range. At low trajectories the shells tend to leave the water again after initially hitting it. Also, the Bismarck armor combination of belt and scarp is theoretically almost ...
by dunmunro
Sat Oct 03, 2020 4:35 am
Forum: Bismarck General Discussion
Topic: Bismarck final battle and German main battery accuracy Qs.
Replies: 29
Views: 2745

Re: Bismarck final battle and German main battery accuracy Qs.

Well something was causing Bismarck to have an increasing list to port, that was clearly visible to RN observers.
by dunmunro
Fri Oct 02, 2020 8:06 pm
Forum: Bismarck General Discussion
Topic: Bismarck final battle and German main battery accuracy Qs.
Replies: 29
Views: 2745

Re: Bismarck final battle and German main battery accuracy Qs.

From KGV's GAR: At 0929 Type 279 started ranging. By 0940 the range was down to about 8000 yds. The enemy's list to port was most pronounced, she was heavily on fire, all guns except "X" and a few secondary armament were out of action, and. . these were firing spasmodically and gallantly. About 0945...
by dunmunro
Thu Sep 24, 2020 7:07 pm
Forum: Off Topic
Topic: bismarck-class.dk site closed?
Replies: 1
Views: 1435

Re: bismarck-class.dk site closed?

Danro wrote:
Sat Jul 18, 2020 6:07 pm
Sorry for posting about an other site but does someone know what happened with the bismarck-class.dk site?
Try:

https://web.archive.org/web/20191121074 ... -class.dk/
by dunmunro
Fri Aug 14, 2020 2:04 am
Forum: Bismarck General Discussion
Topic: Was the battleship Bismarck really the best of its time?
Replies: 34
Views: 2026

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

Yes, I understood your point, except I didn't understand why the Swordfish was the only aircraft capable of operating that radar. I also wasn't aware that the specialized night Catalinas had it. I'm still learning. Do you know by any chance how many ships were torpedoed at night by Swordfish? Would...
by dunmunro
Thu May 28, 2020 7:09 pm
Forum: Naval History (1922-1945)
Topic: Damage to German warships in Brest
Replies: 13
Views: 911

Re: Damage to German warships in Brest

:ok: :ok:

Interesting data.
by dunmunro
Thu May 28, 2020 4:58 pm
Forum: Naval Technology
Topic: Nagato protection
Replies: 38
Views: 2014

Re: Nagato protection

For a discussion of multiplate laminated armour see:

http://www.navweaps.com/index_nathan/mu ... ePlate.php

Okun's rule of thumb is to take the effective thickness of a laminated plate as .7 x the thinnest plate + the full thickness of the thicker plate.
by dunmunro
Tue May 26, 2020 6:35 pm
Forum: Naval Technology
Topic: Nagato protection
Replies: 38
Views: 2014

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 m...
by dunmunro
Tue May 26, 2020 10:33 am
Forum: Naval Technology
Topic: Nagato protection
Replies: 38
Views: 2014

Re: Nagato protection

This is from an RN study comparing KGV and Tirpitz's magazine protection: to be exact it#s from C.B. 04039 (2) (20 th July 1942) Addendum No 2 to C.B. 04039 ARMOUR Protection, 1939. For both armor schemes the britsh recommendations left out the upper deck as having any protective effect. In the ger...
by dunmunro
Tue May 26, 2020 9:31 am
Forum: Naval Technology
Topic: Nagato protection
Replies: 38
Views: 2014

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 steel, not the nichel-chrome-molibdenum WWII (e.g. the ...
by dunmunro
Tue May 26, 2020 1:42 am
Forum: Naval Technology
Topic: Nagato protection
Replies: 38
Views: 2014

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 t...