Search found 329 matches

by Bill Jurens
Fri Aug 16, 2013 5:04 pm
Forum: Naval Weapons
Topic: Question on longitudinal STS bulkheads inside Iowas turrets
Replies: 7
Views: 5069

Re: Question on longitudinal STS bulkheads inside Iowas turr

It's only my recollection to be sure, from looking at drawings some time ago, but for what it is worth... The internal bulkheads in these turrets served both as structural supports to prevent downward deflection from projectile hits on the roof and to limit the spread of flash and flame if an intern...
by Bill Jurens
Tue Aug 06, 2013 9:43 pm
Forum: Bismarck General Discussion
Topic: Bismark´s endurance, fuel bunker and fuel burn.
Replies: 91
Views: 11238

Re: Bismark´s endurance, fuel bunker and fuel burn.

(This is a near-duplicate of a previous post, which has apparently been delayed in being put up on this site. Perhaps it will be posted later; if not, there is no loss as contents are essentially identical.) Regarding repairs, Mr. Dale wrote: "In case anyone is wondering, a 1cm x 3.5m x 3.5m plate w...
by Bill Jurens
Tue Jul 30, 2013 2:51 am
Forum: Bismarck General Discussion
Topic: Victorious and its involvement
Replies: 152
Views: 30779

Re: Victorious and its involvement

Mr. Spurr wrote: "A number of experts have dived on the wreck and at 15 700 feet, obviously in a sub and not with a snorkel lwd. They all found no sign of the hull being penetrated below the waterline. You need to look up these reports, Dr A McLaren in the New York Times stated this, Dr Robert Balla...
by Bill Jurens
Sun Jul 28, 2013 5:20 pm
Forum: Bismarck General Discussion
Topic: Hugh hole on Bismarck's port side amidship.
Replies: 4
Views: 1366

Re: Hugh hole on Bismarck's port side amidship.

My previous post was perhaps a bit unclear. "Projectile damage" does was not intended to imply damage by a single projectile. In reality, this portion of the superstructure obviously experienced multiple projectile hits. In 2001 I was able to enter this hole directly, and have examined James Cameron...
by Bill Jurens
Sun Jul 28, 2013 6:31 am
Forum: Bismarck General Discussion
Topic: Hugh hole on Bismarck's port side amidship.
Replies: 4
Views: 1366

Re: Hugh hole on Bismarck's port side amidship.

I have examined this hole personally and in detail. It was caused by projectile damage augmented by the detachment of the catapult as the ship capsized and/or sank towards the bottom. It cannot (and should not) be attributed to a torpedo hit, although some earlier publications suggest this was the c...
by Bill Jurens
Sat Jul 20, 2013 10:27 pm
Forum: Bismarck General Discussion
Topic: Lutjens' Intentions
Replies: 138
Views: 10099

Re: Lutjens' Intentions

This is a delayed re-send (and rather substantive re-write) of something sent several days ago that apparently did not get through. I hope this one does... Mr. Dale wrote: "The error between the Grid Map and the globe is the reason Doenitz used the large globe for plotting his U-boats positions." If...
by Bill Jurens
Fri Jul 05, 2013 11:08 pm
Forum: Bismarck General Discussion
Topic: The Holes In Bismarck's Bow
Replies: 15
Views: 1960

Re: The Holes In Bismarck's Bow

I have been fortunate in being able to examine the bow area of Bismarck in great detail, both via my own personal observations of the bow -- which included about a half-hour's worth of 'ROV' time -- and via close examination of virtually all of the Cameron videotape and still collection, which -- as...
by Bill Jurens
Wed Jun 19, 2013 2:16 am
Forum: Bismarck General Discussion
Topic: HMS Prince of Wales - Lost and now Found
Replies: 27
Views: 4064

Re: HMS Prince of Wales - Lost and now Found

This photograph, as some have noted, has been discussed at great length many times before. There is really not enough detail there to support the type of analysis Mr. Dale is attmpting. A quick look at the mottled appearance of the clouds gives some immediate idea of the number of artificial artifac...
by Bill Jurens
Sat Jun 01, 2013 5:07 pm
Forum: Bismarck General Discussion
Topic: Tovey's decision not to attack at the evening of 26th
Replies: 23
Views: 2973

Re: Tovey's decision not to attack at the evening of 26th

Mr. Dale wrote: "The torpedo strike in the rudders jammed them at 12 degrees to port." This is not correct, although it's a common enough misconception, which appears to stem from a comment made by 'the Baron' that after the torpedo hit the rudder indicator stopped at 12 degrees to port. This doesn'...
by Bill Jurens
Thu May 16, 2013 6:07 pm
Forum: Bismarck General Discussion
Topic: 38 cm shells
Replies: 42
Views: 13326

Re: 38 cm shells

I am pretty sure -- certain, actually -- that your calculations for angles are incorrect. (You should be able to find the relevant equations in my paper on the Loss of HMS Hood). It's difficult to interpret your nomenclature for angles, as it's fairly informal, but for a slope of 20 degrees (bottom ...
by Bill Jurens
Sat Jan 05, 2013 12:50 am
Forum: Naval Weapons
Topic: Triple and quatruple turrets
Replies: 54
Views: 8572

Re: Triple and quatruple turrets

To Alecsandros: Thank you for this. I am glad to know that my papers are still of interest; sorry to be reminded that I have nearly forgotten some of them. There is indeed a slight misinterpretation I think; although all ships were to fire in this practice, a little later on it is noted that this wa...
by Bill Jurens
Fri Jan 04, 2013 6:03 pm
Forum: Naval Weapons
Topic: Triple and quatruple turrets
Replies: 54
Views: 8572

Re: Triple and quatruple turrets

To Alecsandros: I read your post regarding USN gunnery exercises with considerable interest. I have the the reports on all or most of the inter-war exercises here, but don't recall these particular ones; certainly a large number of battleships simultaneously firing at a single target would be unusua...
by Bill Jurens
Sun Oct 21, 2012 8:43 pm
Forum: Naval Propulsion
Topic: Fuel consumption Bismarck
Replies: 74
Views: 20107

Re: Fuel consumption Bismarck (correction)

The last line of my previous should, of course, say that the Midway class layout was derivitave of, but not identical to, the MONTANA layout...

Bill Jurens
by Bill Jurens
Sun Oct 21, 2012 8:33 pm
Forum: Naval Propulsion
Topic: Fuel consumption Bismarck
Replies: 74
Views: 20107

Re: Fuel consumption Bismarck

An interesting and informative graph. All other issues aside, this presentation clearly illustrates the US design preference -- at least from c. 1930 on -- to design hulls for maximum efficiency at cruising speed rather than for maximum top speed. This is also reflected in USN destroyer designs, whe...
by Bill Jurens
Tue Jul 24, 2012 10:43 pm
Forum: Hypothetical Naval Scenarios
Topic: Washington
Replies: 229
Views: 19058

Re: Update on paper etc.

Hello Alecsandros: I see where you are coming from now. My apologies if I came across as a bit defensive; I was fairly severely 'burnt' by the forward magazine explosion fiasco some years ago, and am certainly reluctant to revisit those sorts of speculations (including "Prinz Eugen did it" and "It w...