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by Herr Nilsson
Mon Aug 26, 2019 7:57 am
Forum: Bismarck General Discussion
Topic: FYI: meaning of the notation of the draft measurements during Bismarck’s trial runs, fall 1940
Replies: 28
Views: 751

Re: FYI: meaning of the notation of the draft measurements during Bismarck’s trial runs, fall 1940

One thing being ignored here, or at least minimized, is the rather dramatic effect of propeller efficiency. Especially if one is running close to the cavitation limit, which Bismarck would almost certainly have been during high-speed trials, even a small defect in blade geometry can affect the spee...
by Herr Nilsson
Sat Aug 24, 2019 5:35 pm
Forum: Bismarck General Discussion
Topic: FYI: meaning of the notation of the draft measurements during Bismarck’s trial runs, fall 1940
Replies: 28
Views: 751

Re: FYI: meaning of the notation of the draft measurements during Bismarck’s trial runs, fall 1940

According to Evers‘ „Kriegsschiffbau“, 1943: He says the German navy used the term „Deplacement“ as a volume or weight. If it‘s a weight, it’s calculated by using a density of 1,015. He also says it‘s the average density of the Baltic. The same density is mentioned for the Baltic in „Leitfaden für d...
by Herr Nilsson
Sat Aug 24, 2019 8:38 am
Forum: Bismarck General Discussion
Topic: FYI: meaning of the notation of the draft measurements during Bismarck’s trial runs, fall 1940
Replies: 28
Views: 751

Re: FYI: meaning of the notation of the draft measurements during Bismarck’s trial runs, fall 1940

Fellow Contributors, I assume because of the density of the water. Exactly. As was raised but largely ignored before, the Baltic is nearly freshwater, less dense than oceanic water, so while Bismarck may have been immersed as if she were at operational displacement 47,900 m3 = 49,100 mt in seawater...
by Herr Nilsson
Fri Aug 23, 2019 4:49 pm
Forum: Bismarck General Discussion
Topic: Battleship Bismarck: A Design and Operational History
Replies: 59
Views: 8981

Re: Battleship Bismarck: A Design and Operational History

@Alberto .... countering your wrong statement that all maps are similar etc., therefore I have to conclude that you have no more argument... I've said most, not all. So said, if you have nothing to add to this discussion, please "dispense" me with your word games, mocking and insinuations about "hon...
by Herr Nilsson
Fri Aug 23, 2019 2:49 pm
Forum: Bismarck General Discussion
Topic: Battleship Bismarck: A Design and Operational History
Replies: 59
Views: 8981

Re: Battleship Bismarck: A Design and Operational History

On the one hand it seems to be unwanted that Antonio's work was possibly adopted (IMHO a little far fetched) on the other hand it is criticised that it wasn't used. ??? I mean, if I were Antonio, I would be very happy, that my old, wrong, flawed, obsolete map was possibly used (having a much newer, ...
by Herr Nilsson
Fri Aug 23, 2019 11:53 am
Forum: Bismarck General Discussion
Topic: FYI: meaning of the notation of the draft measurements during Bismarck’s trial runs, fall 1940
Replies: 28
Views: 751

Re: FYI: meaning of the notation of the draft measurements during Bismarck’s trial runs, fall 1940

Hello Paul, although we knew the speed and the SHP's, we never had an idea at what draft/displacement. It was assumed that Bismarck made her speed in very light condition, because 8.65 meters (using 8.5 and 8.8 as meter values) is almost "empty ship". Knowing the calculation rule, now we know that B...
by Herr Nilsson
Fri Aug 23, 2019 11:20 am
Forum: Bismarck General Discussion
Topic: Battleship Bismarck: A Design and Operational History
Replies: 59
Views: 8981

Re: Battleship Bismarck: A Design and Operational History

Hello Alberto, I don't think so. The main issue is that most maps including Antonio's are based on tracks from official reports (except Bismarck's). Therefore most maps are looking very similar at first glance. However, a closer look reveals that both Hood's and PoW's tracks are not the same like in...
by Herr Nilsson
Fri Aug 23, 2019 8:03 am
Forum: Bismarck General Discussion
Topic: Battleship Bismarck: A Design and Operational History
Replies: 59
Views: 8981

Re: Battleship Bismarck: A Design and Operational History

.... Of course, I'm sure that, unlike Mr.Toussaint, the authors have preventively obtained Antonio's permission to use his material, even if I have been a bit disappointed for being unable to find myself any (well due) explicit acknowledgement to his 2005 map, at least at first glance.... ... Anton...
by Herr Nilsson
Wed Aug 21, 2019 7:04 am
Forum: Bismarck General Discussion
Topic: FYI: meaning of the notation of the draft measurements during Bismarck’s trial runs, fall 1940
Replies: 28
Views: 751

Re: FYI: meaning of the notation of the draft measurements during Bismarck’s trial runs, fall 1940

@Marcelo Not exactly: there aren't all 13 bars, but a just couple of bars in the relevant area around the waterline, which indicated the distance over keel. Furthermore your sequence of calculation differs from the original one. You first read the decimeters of the waterline and add it to the decime...
by Herr Nilsson
Tue Aug 20, 2019 7:03 am
Forum: Bismarck General Discussion
Topic: FYI: meaning of the notation of the draft measurements during Bismarck’s trial runs, fall 1940
Replies: 28
Views: 751

Re: FYI: meaning of the notation of the draft measurements during Bismarck’s trial runs, fall 1940

@José 8,8/4 = 98,8 dm = 9,88 m @Marcelo Well, it was called "getarnte Tiefgangsmeldung" (masked draft message). Without the height of the highest bar above keel and the calculation rule the values are quite worthless. IMHO it should prevent that any unauthorized reader (or even authorized bearer) of...
by Herr Nilsson
Mon Aug 19, 2019 7:52 am
Forum: Bismarck General Discussion
Topic: FYI: meaning of the notation of the draft measurements during Bismarck’s trial runs, fall 1940
Replies: 28
Views: 751

FYI: meaning of the notation of the draft measurements during Bismarck’s trial runs, fall 1940

As some members might remember there is the riddle of the very cryptic draft measurements during Bismarck’s trial runs, fall 1940. speedtrial29.jpg We have discussed it at one time or another: http://www.kbismarck.org/forum/viewtopic.php?f=1&t=1828&p=21066 http://www.kbismarck.org/forum/viewtopic.ph...
by Herr Nilsson
Sat Aug 10, 2019 10:49 am
Forum: Bismarck General Discussion
Topic: 3-shaft propulsion
Replies: 115
Views: 2719

Re: 3-shaft propulsion

From the original operation instructions (my collection):

SMS Kaiser:
Kaiser.jpg
Kaiser.jpg (126.85 KiB) Viewed 205 times
SMS Bayern (just two turbine rooms shown):
Bayern.jpg
Bayern.jpg (121.09 KiB) Viewed 205 times
In comparison:
SMS Moltke:
Moltke.jpg
Moltke.jpg (123.87 KiB) Viewed 205 times
by Herr Nilsson
Wed Aug 07, 2019 10:28 am
Forum: Bismarck General Discussion
Topic: 3-shaft propulsion
Replies: 115
Views: 2719

Re: 3-shaft propulsion

@ Thorsten

Almost, BS 30.05 kn and TP 30.15 kn.
by Herr Nilsson
Wed Aug 07, 2019 7:40 am
Forum: Bismarck General Discussion
Topic: 3-shaft propulsion
Replies: 115
Views: 2719

Re: 3-shaft propulsion

Scharnhorst's and Tirpitz' turbines were of similar design, but Bismarck's was very different. According their manuals Scharnhorst and Tirpitz had a very similar (almost identical) steam consumption per SHP You meant the consumption drawings in Kriegserfahrungen...Oberbaurat Krux? Power RPM ....ste...