Search found 319 matches

by Bill Jurens
Sun May 18, 2014 4:52 pm
Forum: Bismarck General Discussion
Topic: Bismarck second hit on PoW : HACS Director
Replies: 79
Views: 7311

Re: Bismarck second hit on PoW : HACS Director

Wadinga wrote: "From the Admiralty Manual of Seamanship. 1932 The Repulse's advance and tactical diameter are however, 885 and 960 yards respectively That is to say after the order to turn at maximum helm is given the smaller, shorter Repulse takes 885 yards of travel at 20 knots (standard speed) be...
by Bill Jurens
Wed Nov 13, 2013 1:04 am
Forum: Bismarck General Discussion
Topic: Bismarck and her contemporaries
Replies: 1293
Views: 120471

Re: Bismarck and her contemporaries

Sineatimorar wrote: "The hit to the side on the torpedo bulkhead seems to be the more likely hit that caused the mission to be aborted would you not agree?" I don't consider myself a tactical expert, but my guess is that the real problem was that regardless of damage suffered once Bismarck had been ...
by Bill Jurens
Mon Nov 11, 2013 5:15 pm
Forum: Bismarck General Discussion
Topic: Bismarck and her contemporaries
Replies: 1293
Views: 120471

Shell hole in Bismarck's Bow

As a co-author of the paper cited in a recently posted memo, I would like to assure readers that the allocation of specific holes to specific projectile hits in the bow area remains, at best, highly speculative. The paper makes it sound as though the identification of the holes was definitive, but i...
by Bill Jurens
Thu Nov 07, 2013 3:46 pm
Forum: Bismarck General Discussion
Topic: Bismarck and her contemporaries
Replies: 1293
Views: 120471

Re: Bismarck and her contemporaries

In a previous post, someone asked if I might comment on ballistic computational issues. It is well-known that I remain skeptical regarding the reliability of figures obtained via various programs available on-line. This is largely because in most of these programs the precise computational procedure...
by Bill Jurens
Sun Aug 18, 2013 4:37 am
Forum: Naval Weapons
Topic: Question on longitudinal STS bulkheads inside Iowas turrets
Replies: 7
Views: 4457

Re: Question on longitudinal STS bulkheads inside Iowas turr

Hello Mr. Munro: I did take a quick glance at the thread you mentioned, but am not quite sure what is being argued about. Perhaps someone might clarify. My only immediate comments would be: a)There is really nothing new in the material being presented on Hood's testing, etc., as all of this has been...
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: 4457

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: 10742

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: 24257

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: 1294

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: 1294

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: 9407

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: 1848

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: 3920

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: 2847

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: 10392

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 ...