Search found 767 matches

by Bill Jurens
Mon Apr 13, 2020 3:59 pm
Forum: Naval History (1922-1945)
Topic: Updating the KGV class
Replies: 77
Views: 4567

Re: Updating the KGV class

My thanks for the comments. To elaborate just a bit, and perhaps at the cost of some redundancy, what's not often fully appreciated is that in some cases -- perhaps many -- the outcome is decided at least as much by the qualities of the crew manning the guns and working the ship than the qualities o...
by Bill Jurens
Sun Apr 12, 2020 6:24 pm
Forum: Naval History (1922-1945)
Topic: Updating the KGV class
Replies: 77
Views: 4567

Re: Updating the KGV class

Mr. Angel commented on some aspects of Bismarck's alleged invulnerability ballistic penetration of the side protection system, or at least that portion of the system expressed above the waterline. Cogent observations. I want to emphasize at the outset that although this reply is being posted in resp...
by Bill Jurens
Sun Apr 12, 2020 5:39 pm
Forum: Naval History (1922-1945)
Topic: Updating the KGV class
Replies: 77
Views: 4567

Re: Updating the KGV class

Mr Mercer asked: "Can we dare to hope that this is a gentle hint that a second or revised book will be published at a later date? I somewhat doubt that a second edition will be published, first, because it would take a good deal of work to get the editorial team back together again for any extended ...
by Bill Jurens
Sun Apr 12, 2020 5:06 pm
Forum: Bismarck General Discussion
Topic: A correct attribution for the "Flash Effect" photo?
Replies: 343
Views: 18399

Re: A correct attribution for the "Flash Effect" photo?

This is a good place for the photo, and the question. This appears, at least at first glance, to be one of the photos taken rather late in the action, and is often described as showing Bismarck 'down by the bow' due to the hit forward, but the effect shown could quite easily have been due to catchin...
by Bill Jurens
Sun Apr 12, 2020 4:26 am
Forum: Naval History (1922-1945)
Topic: Updating the KGV class
Replies: 77
Views: 4567

Re: Updating the KGV class

My examination of the wreck of Bismarck was quite detailed and -- as might be expected -- I spent a good deal of time looking for specific instances of belt penetrations, etc. There were, in fact, very few of those -- as I recall, two to port and two to starboard. Curiously, the small number of larg...
by Bill Jurens
Wed Apr 08, 2020 6:18 pm
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 35
Views: 1852

Re: Wind Behavior: 0400 - 0600

Mr. Malara wrote: "...' for a fairly typical big gun at a range of about 20000 yards, range might be expected to change about 7 yards per knot of headwind or tailwind" This is assuming the wind blows contrary to the shell during all the trajectory? Or just the sea level wind?' Yes. Just the sea-leve...
by Bill Jurens
Wed Apr 08, 2020 6:02 pm
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 35
Views: 1852

Re: Wind Behavior: 0400 - 0600

Mr. Mercer wrote: "Given all that data I'm surprised that ships managed to hit each other at all. particularly at any great range!" As many have noted, hits at substantial ranges were quite rare, and in many cases can be attributed as much to good luck as good skill. "...if an average 15" shell left...
by Bill Jurens
Wed Apr 08, 2020 4:29 am
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 35
Views: 1852

Re: Wind Behavior: 0400 - 0600

Range and deflection corrections for wind and target/firing ship motion can vary drastically depending upon the characteristics of the gun and the magnitude of the wind and speed one is experiencing. These corrections are discussed in detail in any number of textbooks on ballistics and fire control....
by Bill Jurens
Tue Apr 07, 2020 5:11 pm
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 35
Views: 1852

Re: Wind Behavior: 0400 - 0600

That's a good question, which requires differentiating fire control issues from ballistic phenomena. Because the effects of wind ARE important in determining -- or at least estimating -- the precise point of fall, as are (in some situations), earth rotation, etc., these effects are important in deci...
by Bill Jurens
Tue Apr 07, 2020 4:34 pm
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 35
Views: 1852

Re: Wind Behavior: 0400 - 0600

Basically, no. Wind affects the point of impact somewhat, but does not usually have any significant effect on terminal conditions. Relative ship speeds -- both the firing ship and the target are usually moving during the firing -- can make a fair difference, though. If both ships are steaming head-t...
by Bill Jurens
Sun Apr 05, 2020 2:47 am
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 35
Views: 1852

Re: Wind Behavior: 0400 - 0600

Thank you so much for the internet references. What wonderful resources these are!

Bill Jurens
by Bill Jurens
Sat Apr 04, 2020 9:34 pm
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 35
Views: 1852

Re: Wind Behavior: 0400 - 0600

My thanks to those who have provided meteorological charts for the 24 May action. Well done! I might ask two things. First -- as weather evolves even over short periods -- exactly what time of day is depicted on the charts already provided. Are these for 12:00 noon GMT or some other time? Secondly, ...
by Bill Jurens
Wed Mar 18, 2020 7:17 pm
Forum: Bismarck General Discussion
Topic: A correct attribution for the "Flash Effect" photo?
Replies: 343
Views: 18399

Re: A correct attribution for the "Flash Effect" photo?

I have, as readers will note, and as mentioned earlier, deleted the majority of Mr. Virtuani's commentaries posted on or about 15 March. For the most part, these consisted of redundant and repetitive personal attacks on the moderator and various other forum participants. Although I still find some o...
by Bill Jurens
Sat Mar 14, 2020 4:00 pm
Forum: Bismarck General Discussion
Topic: A correct attribution for the "Flash Effect" photo?
Replies: 343
Views: 18399

Re: A correct attribution for the "Flash Effect" photo?

As readers will note, Mr. Virtuani has, as anticipated, returned with a vengeance and apparently chosen to hereafter 'self-isolate' from further postings to this board. Although I am -- for what I presume are, to most, fairly obvious reasons -- tempted to delete his recent posts immediately, in fair...
by Bill Jurens
Sun Feb 23, 2020 5:12 pm
Forum: Bismarck General Discussion
Topic: Clerical issues
Replies: 3
Views: 720

Clerical issues

As most readers know, earlier in the year contributor Alberto Virtuani was banned from participation until 01 March, 2020. I have since committed to some travel plans which will render my regular access to a computer somewhat problematical during the first two weeks of March. This will quite likely ...