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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: 946

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: 946

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: 946

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: 3292

Re: 3-shaft propulsion

From the original operation instructions (my collection):

SMS Kaiser:
Kaiser.jpg
Kaiser.jpg (126.85 KiB) Viewed 261 times
SMS Bayern (just two turbine rooms shown):
Bayern.jpg
Bayern.jpg (121.09 KiB) Viewed 261 times
In comparison:
SMS Moltke:
Moltke.jpg
Moltke.jpg (123.87 KiB) Viewed 261 times
by Herr Nilsson
Wed Aug 07, 2019 10:28 am
Forum: Bismarck General Discussion
Topic: 3-shaft propulsion
Replies: 115
Views: 3292

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: 3292

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...
by Herr Nilsson
Tue Aug 06, 2019 6:27 pm
Forum: Bismarck General Discussion
Topic: 3-shaft propulsion
Replies: 115
Views: 3292

Re: 3-shaft propulsion

What are you looking for exactly?
by Herr Nilsson
Tue Aug 06, 2019 12:33 pm
Forum: Bismarck General Discussion
Topic: 3-shaft propulsion
Replies: 115
Views: 3292

Re: 3-shaft propulsion

Hello everybody, Thorsten Wahl wrote: "Bismarcks machinery was more sturdy, the complete steam piping was much better shock protected." Hi, Thorsten, thanks for your answer to my question. From what you write, I understand that the power plants were the same in terms of boilers and turbines, just m...
by Herr Nilsson
Sun Aug 04, 2019 12:06 pm
Forum: Bismarck General Discussion
Topic: 3-shaft propulsion
Replies: 115
Views: 3292

Re: Battleship Bismarck: A Design and Operational History

It seems to me, that there is some confusion in secondary sources. 58 atü (kg/cm^2) was the working pressure at 450° on Bismarck and Tirpitz and obviously the same on Scharnhorst and Gneisenau. For 125000 SHP Scharnhorst needed 12 boilers at 42 atü and for more than 160000 SHP 12 boilers at 56 atü....
by Herr Nilsson
Sat Aug 03, 2019 1:31 pm
Forum: Bismarck General Discussion
Topic: 3-shaft propulsion
Replies: 115
Views: 3292

Re: Battleship Bismarck: A Design and Operational History

Hello everybody, Marcelo Malara wrote: "Garzke gives 2863 t for Scharnhorst (125000 hp at 52 kg/cm2) and 2756 t for Bismarck (135000 hp at 58 kg/cm2)." What was improved in Bismarck's boilers/machinery vs Scharnhorst's ? Wasn't the Bismarck propulsion plant (including the boilers) basically the sam...
by Herr Nilsson
Fri Aug 02, 2019 8:32 pm
Forum: Bismarck General Discussion
Topic: 3-shaft propulsion
Replies: 115
Views: 3292

Re: Machinery Volume

For Bismarck the volume of the 6 boiler rooms + 3 turbine rooms is 10,250 m3 (9,835 m3 without the cable alley). The turbine rooms alone are 4,660 m3 (4,520 m3 without the cable alley). boiler rooms + turbine rooms: 11,003 m^3 turbine rooms: 4,517 m^3 Marc, I calculated the max. enclosed volume: Ce...
by Herr Nilsson
Fri Aug 02, 2019 12:45 pm
Forum: Bismarck General Discussion
Topic: 3-shaft propulsion
Replies: 115
Views: 3292

Re: Machinery Volume

José M. Rico wrote:
Fri Aug 02, 2019 12:06 pm
For Bismarck the volume of the 6 boiler rooms + 3 turbine rooms is 10,250 m3 (9,835 m3 without the cable alley).
The turbine rooms alone are 4,660 m3 (4,520 m3 without the cable alley).
boiler rooms + turbine rooms: 11,003 m^3
turbine rooms: 4,517 m^3
by Herr Nilsson
Fri Aug 02, 2019 12:26 pm
Forum: Naval Technology
Topic: Weight statements of warships
Replies: 1
Views: 280

Re: Weight statements of warships

weight.jpg S =Hull M I =Main machinery M II =Aux. machinery A =Gun armament T =Torpedo F =Airplane facilities Spr =Mine equipment Leeres Schiff =Empty ship (I?) J =General equipment N =Nautical equipment Ta =Radio equipment (actually rigging) M I =Machinery equipment M I M II =Machinery equipment M...
by Herr Nilsson
Tue Jul 30, 2019 4:37 pm
Forum: Bismarck General Discussion
Topic: 3-shaft propulsion
Replies: 115
Views: 3292

Re: Battleship Bismarck: A Design and Operational History

M I is machinery in regard of propulsion (boilers, turbines etc. but also smoke stacks and piping). M II is auxiliary machinery (for capstans, rudders etc., but also the heating installation). M II was 1400 tonnes IIRC.
by Herr Nilsson
Tue Jul 30, 2019 7:38 am
Forum: Bismarck General Discussion
Topic: 3-shaft propulsion
Replies: 115
Views: 3292

Re: Battleship Bismarck: A Design and Operational History

marcelo_malara wrote:
Tue Jul 30, 2019 4:55 am
2756 t for Bismarck (135000 hp at 58 kg/cm2).
This is from the weight List M I (2800 tonnes at 115000 SHP norm. and 138000 SHP max.) from Dezember, 30th 1936 including 252.2 tonnes water and 32 tonnes of 2 spare propellers.