Search found 2983 matches

by Dave Saxton
Sun Jan 01, 2006 4:37 pm
Forum: Naval Technology
Topic: USN fast BB liquid load arrangements?
Replies: 2
Views: 1597

USN fast BB liquid load arrangements?

What exactly were the the loading arrangements for the liquid loads in the fast battleships? I'm interested in how the South Dakota/Iowa differed from as designed to as built. Most information is rather ambiguous. Additionally, more detailed information on the NC would also be helpful. Thanks, Dave ...
by Dave Saxton
Fri Dec 30, 2005 5:44 pm
Forum: Naval Technology
Topic: Iowa Class 1.5-inch STS decapping plate
Replies: 7
Views: 4286

The British improved the cap on their APC after Jutland. Many assume that removing the cap only matters if face hardened armour is encountered. Although removing the cap increases shell breakup potential, in the case of impact against face hardened plates, it also reduces the shell's penetration pot...
by Dave Saxton
Sat Nov 12, 2005 2:01 am
Forum: Naval Technology
Topic: Electrolytic Reduction
Replies: 2
Views: 1345

Hi Ulrich, I don't know what to degree this kind of thing may be needed. I don't know the chemical composition of the gun tubes, but the composition of the armour plates is such that chloride corrosion would be greatly retarded. Chroride induced corrosion is greatly reduced by combining modest amoun...
by Dave Saxton
Thu Nov 03, 2005 8:46 am
Forum: Bismarck General Discussion
Topic: Turret Armor
Replies: 35
Views: 11309

Hi Marty, It would be nice if we could simply work a solution for each plate in turn using a simple equation, but this may not give us an accurate result. Most formulas consider striking velocity and striking angle, but the characteristics of the shell, and also the resistance properties of the plat...
by Dave Saxton
Wed Nov 02, 2005 6:52 pm
Forum: Bismarck General Discussion
Topic: Turret Armor
Replies: 35
Views: 11309

A comment on spalling and spall control. I have enccountered some 1960's US Army research data and one that partially deals with this problem. The Army found that when two homogenous plates are layed over each other (laminated) the back plate will usually spall out reducing the effective thickness. ...
by Dave Saxton
Mon Oct 31, 2005 9:44 pm
Forum: Bismarck General Discussion
Topic: Turret Armor
Replies: 35
Views: 11309

The Italian tests involved AP shells up to 381mm, and it showed effective thickness to be roughly equal to the sum thickness of the plates, plus a bit more. A 1:1 ratio does seem to be possible, even with large projectiles. We do need to consider the material properties of plates used. Early 1920's ...
by Dave Saxton
Mon Oct 31, 2005 3:34 pm
Forum: Bismarck General Discussion
Topic: Turret Armor
Replies: 35
Views: 11309

The Germans considered two types of limit velocities based on firing trials. One was the nessasary velocity to penetrate a given thickness of armour. The other was the limit that a typical shell could withstand, given it's condition and striking angle, and still penetrate, without breaking up. Were ...
by Dave Saxton
Mon Oct 31, 2005 3:08 am
Forum: Bismarck General Discussion
Topic: Turret Armor
Replies: 35
Views: 11309

Well, I think it must be 4". 7" seems a bit optimistic, but I could be wrong. I'm no math whiz, but hopefully getting better. Given a suitable arrangement of plates and given suitable materials, it possible for spaced armor to have an effective thickness equal to the sum thickness of the plates, or ...
by Dave Saxton
Sat Oct 29, 2005 3:48 pm
Forum: Bismarck General Discussion
Topic: Turret Armor
Replies: 35
Views: 11309

[The difference between 0.185 and 0.25 is the nominal difference between the resistance of FH armor vs the resistance of RHA reference , which was used as the basis of most ballistics. If the plate was mild steel, the adjustment would be 0.8 to 0.67 depending on the BHN of the mild steel plate. ......
by Dave Saxton
Fri Oct 21, 2005 6:42 pm
Forum: Books and Reference
Topic: Garzke books
Replies: 4
Views: 1851

R&R's "British Battleships", is exaustive and well written. It is well researched too. It includes alot of archive derived technical data, and outstanding blue print drawings. I Havn't seen the two books you listed, so I can't comment on them. I just think that Friedman's batteleship books, and that...
by Dave Saxton
Thu Oct 20, 2005 7:03 pm
Forum: Books and Reference
Topic: Garzke books
Replies: 4
Views: 1851

If your intersted in these matters, then the Garzke & Dullin books are required reading. They are expensive, so if you have access to them through a library...ect, you could save a lot of money. I believe that Raven and Roberts did a better job of examining British battleships, and I much prefer Nor...
by Dave Saxton
Wed Oct 19, 2005 2:49 am
Forum: Hypothetical Naval Scenarios
Topic: Tirpitz instead of Scharnhorst in North Cape
Replies: 65
Views: 23826

I typed up a response complete with quotations from Von Mullenheim, but I took so long it was lost in cyber space. In short, yes, late war radar systems could provide the factors you list. Early war systems were less capable, for both German and allied systems. The allied systems were more advanced ...
by Dave Saxton
Tue Oct 18, 2005 7:21 pm
Forum: Hypothetical Naval Scenarios
Topic: Tirpitz instead of Scharnhorst in North Cape
Replies: 65
Views: 23826

Bill Garzke wrote a detailed post on this several years ago. Mr Garzke described the German fire control systems as being very similar to those used by the USN fast battleships. Paul Schmalenbach wrote a detailed peice on the PG fire control systems and I found Mr Schmalenbach's discription to be ve...
by Dave Saxton
Tue Oct 18, 2005 12:24 am
Forum: Hypothetical Naval Scenarios
Topic: Tirpitz instead of Scharnhorst in North Cape
Replies: 65
Views: 23826

The Germans seem to have been determined to complete the mission, regardless of the difficulties. They, having been repelled intially, attempted to re-engage the convoy at least twice more. Only after Group North determined through decoded radio intercepts, that DoY was moving in for the kill, did t...
by Dave Saxton
Tue Sep 20, 2005 1:52 am
Forum: Naval History (1922-1945)
Topic: Yamato's fuel situation-Nov 42?
Replies: 16
Views: 8961

I need to make a correction to my above post. During operation Sportpalst Tirpitz operated with three DD's, not two. All three DD's were detatched to Tromso to refuel on March 8th, or after two days at sea. Friedrich Ihn rejoined Tirpitz at sea at 0645 on March 9th. Assuming, Tirpitz started with a ...