Search found 1577 matches

by Herr Nilsson
Fri Dec 22, 2023 8:36 pm
Forum: Bismarck General Discussion
Topic: Group North and Group West
Replies: 12
Views: 25202

Re: Group North and Group West

AFAIK 12 a.m. is midnight and 12 p.m. is noon. To make it simple it should read 12:00 h or noon
by Herr Nilsson
Wed Dec 20, 2023 9:41 am
Forum: Bismarck General Discussion
Topic: Group North and Group West
Replies: 12
Views: 25202

Re: Group North and Group West

The official border between Group North and West for Rheinübung was the line from the southern tip of Greenland to the northern tip of the Hebrides. If this line was crossed, a message should be made to the groups, which triggered the transfer of command. Based on the intercepted shadowings reports,...
by Herr Nilsson
Thu Dec 07, 2023 1:06 pm
Forum: Bismarck General Discussion
Topic: Bismarck and European battleships vs.US battleships - hull shape and seakeeping qualities.
Replies: 32
Views: 58705

Re: Bismarck and European battleships vs.US battleships - hull shape and seakeeping qualities.

... The designers would have known the planned height above sea surface and evidently considered it adequate and therefore built a housing for a rangefinder, and in any case it is clear the Dora turret was at much the same height and did ship a rangefinder. However the spray factor is IMHO unchalle...
by Herr Nilsson
Tue Dec 05, 2023 11:40 am
Forum: Bismarck General Discussion
Topic: Bismarck and European battleships vs.US battleships - hull shape and seakeeping qualities.
Replies: 32
Views: 58705

Re: Bismarck and European battleships vs.US battleships - hull shape and seakeeping qualities.

@wadinga
Read:
"excellent indifferent [to sea state] seagoing vessels with calm, flat pitching and low rolling movements".

In regard of the Baltic:

Yes, the Baltic is not the Atlantic, but OTOH I don't know any reports stating that Bismarck and Tirpitz had bad seakeeping qualities.
by Herr Nilsson
Mon Dec 04, 2023 5:35 pm
Forum: Bismarck General Discussion
Topic: Secundary guns turrets
Replies: 26
Views: 24025

Re: Secundary guns turrets

Below every foremost turret is a handling room. The 15 cm magazines were behind bulkheads of this handling room. The shells and charges were stored on the opposite side of these bulkheads (distance ~1.5m). Ammunition was transported through small hatches into the handling room. The hatches were loca...
by Herr Nilsson
Mon Dec 04, 2023 9:05 am
Forum: Bismarck General Discussion
Topic: Bismarck and European battleships vs.US battleships - hull shape and seakeeping qualities.
Replies: 32
Views: 58705

Re: Bismarck and European battleships vs.US battleships - hull shape and seakeeping qualities.

The AVKS-report states: "The subsequent installation of a rangefinder in turret A, which was still pending for the time being, can now be definitively omitted."
by Herr Nilsson
Mon Dec 04, 2023 7:55 am
Forum: Bismarck General Discussion
Topic: Bismarck and European battleships vs.US battleships - hull shape and seakeeping qualities.
Replies: 32
Views: 58705

Re: Bismarck and European battleships vs.US battleships - hull shape and seakeeping qualities.

Bismarck is also rather wet forwards, leading to the range finder in A turret being unusable. That's not quite right. Bismarck's range A-turret finder was never installed and the real reason for not installing it later on was the low height above the waterline, which made it rather useless. Regardi...
by Herr Nilsson
Mon Sep 18, 2023 8:56 am
Forum: Bismarck General Discussion
Topic: Gun precision / dispersion
Replies: 129
Views: 70129

Re: Gun precision / dispersion

Gneisenau had two brand-new FuMG 40G in early Dezember 41(one TS6 and one TS1). Gneisenau's old FuMG 39G TS1 was transfered to Scharnhorst and got a TS6 (Scharnhorst was the first ship, which had both devices equipped with TS6). At the same time Tirpitz had one FuMG 39G with TS1, one FuMG 40G with T...
by Herr Nilsson
Mon Sep 18, 2023 7:19 am
Forum: Bismarck General Discussion
Topic: Gun precision / dispersion
Replies: 129
Views: 70129

Re: Gun precision / dispersion

fsimon wrote: Mon Sep 18, 2023 6:40 am My impression:
FuMG 39 were delivered at 2000 Hz but received 500 Hz transmitters from late 1940 while retaining the designation FuMG 39 due to retaining most of the initially delivered parts including the housing and mountings.
Definitely not!
by Herr Nilsson
Tue Aug 15, 2023 10:11 am
Forum: Bismarck General Discussion
Topic: Identify indicator
Replies: 35
Views: 29690

Re: Identify indicator

@Marcello Malara Original plans? No, not plans in a narrower sense. On the whole I would estimate 1.5-2 m shelf space originals (operating manuals, building regulations etc.). @wadinga Thanks for the compliment, but this certainly overexaggerated. There are so many wonderful small design and enginee...
by Herr Nilsson
Mon Aug 14, 2023 1:26 pm
Forum: Bismarck General Discussion
Topic: Identify indicator
Replies: 35
Views: 29690

Re: Identify indicator

I've colored Hipper's clutch and I hope it helps to understand the mechanism: They used a bevel gear to synchronise the revolutions of the turbine (blue) and propeller (yellow) shaft. In case of indentical revolutions the green part wouldn't rotate anymore (except the upper bevel wheel). The revolut...
by Herr Nilsson
Sat Jul 15, 2023 8:37 am
Forum: Bismarck General Discussion
Topic: Tirpitz and Gneisenau main armor belt thickness etc.
Replies: 8
Views: 6553

Re: Tirpitz and Gneisenau main armor belt thickness etc.

Thank you. I recommend to forget this aggregation of data.
by Herr Nilsson
Fri Jul 14, 2023 12:59 pm
Forum: Bismarck General Discussion
Topic: Tirpitz and Gneisenau main armor belt thickness etc.
Replies: 8
Views: 6553

Re: Tirpitz and Gneisenau main armor belt thickness etc.

As built, the dimensions of Bismarck and Tirpitz were almost identical, with the latter being a whopping 20 tons heavier and 17cm longer at the waterline. Now, Tirpitz shaved off quite some amount of armor; 5mm main belt, 30mm deck armor over the machinery (while adding 5mm over the magazines), and...
by Herr Nilsson
Wed Jul 12, 2023 10:04 am
Forum: Bismarck General Discussion
Topic: Identify indicator
Replies: 35
Views: 29690

Re: Identify indicator

It depends. It's possible to stop the shaft by the turbine and then clamp it by a brake. This brake would work up to about 15 knots. The coupling on Scharnhorst and Bismarck could be coupled while shaft and turbine were running. There was an synchronized revolutions indicator to determine the right ...