Search found 2928 matches

by Dave Saxton
Fri Jul 20, 2018 2:00 am
Forum: Naval History (1922-1945)
Topic: Question on HMS Repulse
Replies: 2
Views: 68

Re: Question on HMS Repulse

The 284 as a gunnery radar mounted to the main director would likely be kept switched off until a surface combat threat materialized. It required that it be rested at intervals when in operation, so there was little incentive to leave it switched on all the time, especially if spare vacuum tubes and...
by Dave Saxton
Tue Jul 17, 2018 3:38 pm
Forum: Hypothetical Naval Scenarios
Topic: Battleship for Freedonia
Replies: 14
Views: 757

Re: Battleship for Freedonia

Let us try to choose the best armament for our battleship. I am going to agree with Dave on the secondary armament. The only available alternatives are USN's 5"/38 or the RN's 5.25". We will select the 5.25" as it will be better for dealing with destroyers or aircraft dropping Fritz-X bombs. Howeve...
by Dave Saxton
Mon Jul 09, 2018 6:54 pm
Forum: Hypothetical Naval Scenarios
Topic: Battleship for Freedonia
Replies: 14
Views: 757

Re: Battleship for Freedonia

If Freedonia's fortune tellers can see forward well enough to know that from 1942 on that 90% of surface combat will be at night, it will require a complete re-think of IZ ranges. An inner IZ well below 20,000 yards will be required. The outer IZ will likely be more than adequate if the horizontal p...
by Dave Saxton
Mon Jul 09, 2018 2:49 pm
Forum: Hypothetical Naval Scenarios
Topic: Battleship for Freedonia
Replies: 14
Views: 757

Re: Battleship for Freedonia

Yamato has a very high freeboard amidship (see https://www.flickr.com/photos/27417638@N07/4181515847 which seems to be a copy of the illustration from page 52 of Skulski's Anatomy of a Ship - The Battleship Yamato). I am hoping that Freedonia may be able to follow German ideas with a continuous 50 ...
by Dave Saxton
Mon Jul 09, 2018 2:10 pm
Forum: Hypothetical Naval Scenarios
Topic: Battleship for Freedonia
Replies: 14
Views: 757

Re: Battleship for Freedonia

Bombs represent an intractable problem because they can strike at or near the normal. Perhaps Freedonia's fortune tellers will discover that even the Musashi's horizontal protection will fail against bombs. The bomb damages inflicted on Tirpitz showed that it was not particularly vulnerable to bombs...
by Dave Saxton
Tue Jun 26, 2018 3:46 pm
Forum: Naval Technology
Topic: The Structural role of Main Armour Decks
Replies: 2
Views: 196

Re: The Structural role of Main Armour Decks

KM Chief Engineer Tobicke described that the German scarp triangle design performed both ballistic and structural functions. The panzer deck and the longitudinal armoured bulkheads essentially comprised a great H beam that the rest of the hull was built from. Combining both ballistic and structural ...
by Dave Saxton
Tue Jun 26, 2018 3:22 pm
Forum: Naval Technology
Topic: Question about armor effective thickness
Replies: 3
Views: 181

Re: Question about armor effective thickness

The Germans determined that the point of diminishing returns in terms of face hardened armour was about 13". It was also found that homogeneous armour should not exceed much more than about 6" thickness.
by Dave Saxton
Sat Jun 23, 2018 6:06 pm
Forum: Hypothetical Naval Scenarios
Topic: Battleship for Freedonia
Replies: 14
Views: 757

Re: Battleship for Freedonia

There are options concerning construction materials and methods circa 1936. Type of steels available are: Mild Steel. Mild Steel has a carbon content of .18% by weight. The ultimate tensile strength is about 60,000 psi. One advantage of mild steel is that it is very weldable. Elongation in 8-inches ...
by Dave Saxton
Fri Jun 22, 2018 1:53 pm
Forum: Hypothetical Naval Scenarios
Topic: Battleship for Freedonia
Replies: 14
Views: 757

Re: Battleship for Freedonia

The Italian 15” gun represented a dramatic increase in penetrative power. All new large caliber naval guns could potentially bring such capability. No longer could a belt of face hardened armour that was approximately the thickness of the caliber of shell it was designed to defeat provide protection...
by Dave Saxton
Thu Jun 21, 2018 3:38 pm
Forum: Hypothetical Naval Scenarios
Topic: Battleship for Freedonia
Replies: 14
Views: 757

Re: Battleship for Freedonia

In 1936, the ten years moratorium of battleship construction has just ended one year before. One of the important aspects of the moratorium was that it not only suspended new construction, but also largely suspended research and development of guns and armour-at least among those who honored their t...
by Dave Saxton
Wed Jun 20, 2018 3:57 pm
Forum: Naval History (1922-1945)
Topic: The range at which actions were fought
Replies: 1
Views: 158

Re: The range at which actions were fought

Hi Mostlyharmless, What I find interesting, is not the low hit probability of long ranges, but that night battle became the norm. After 1941, about 90% of all surface battles were fought at night. Night naval combat essentially excludes extreme long range gunnery for a number of reasons, even with a...
by Dave Saxton
Sat May 19, 2018 8:04 pm
Forum: Naval Technology
Topic: Scharnhorst Radar Set
Replies: 12
Views: 1255

Re: Scharnhorst Radar Set

The documents are from the OKM Tagung, Berlin, March 1944.
by Dave Saxton
Thu May 17, 2018 2:58 pm
Forum: Naval Technology
Topic: Scharnhorst Radar Set
Replies: 12
Views: 1255

Re: Scharnhorst Radar Set

The new radars sets were installed after Operation Sizilien, exactly when I don't know. I would expect before the end of Nov, before the onset of the Polar Night, which lasted until the end of Jan, because the photo I have a copy of was not taken at night. According to the documents the aft set rece...
by Dave Saxton
Wed May 16, 2018 2:44 pm
Forum: Naval Technology
Topic: Scharnhorst Radar Set
Replies: 12
Views: 1255

Re: Scharnhorst Radar Set

Hi Dave, If I understand correctly, this means that Seetakt was able to search surface targets, provide rangefinding for gunnery and also perform air surveillance. However, I don't understand how this could be done by a flat antenna: I imagine the whole rangefinder (armored aft) had to be rotated c...
by Dave Saxton
Tue May 15, 2018 8:35 pm
Forum: Naval Technology
Topic: Scharnhorst Radar Set
Replies: 12
Views: 1255

Re: Scharnhorst Radar Set

I'm a bit surprised that Germans in 1943 had not clearly separated yet the tactical radar from the rangefinder gunnery radar and I would ask some clarification about the effectiveness of such choice...... Throughout 1943, the KM was waiting for the Berlin PPI radars. Although Seetakt was quite capa...