Search found 1260 matches

by marcelo_malara
Tue Mar 21, 2006 8:00 pm
Forum: Naval Technology
Topic: Doubts about three shafts stern of Bismarck
Replies: 48
Views: 20757

Karl, I compiled this data for Hood and Bismarck, (roughly) equivalente ships: Bismarck: 3-bladed, 4.8 m diameter propellers, 270 rpm for 150000 hp, 30 kt Hood: 3-bladed, 4.57 m diameter propellers, 206 rpm for 151000 hp, 32 kt It seems that the 3 shaft arrangement needs a little larger screw and 30...
by marcelo_malara
Sat Mar 18, 2006 11:52 pm
Forum: Naval Technology
Topic: Doubts about three shafts stern of Bismarck
Replies: 48
Views: 20757

In this case Bismarck design is more efficient than the four shaft-four propeller arrange in the KGV Class because each of Bismarck´s shafts is transmitting 50,056 (nominal) hp while the KGV´s shafts are transmiting 28,250 hp each. What Karl is trying to say is not that the British arrangement is l...
by marcelo_malara
Fri Mar 17, 2006 4:00 pm
Forum: Hypothetical Naval Scenarios
Topic: Bismarck vs. HMS Warspite + HMS Exeter
Replies: 22
Views: 14313

Look for the protection figures of Warspite. She is pretty much as Hood. May be she hits Bismarck and does a little damage, but Bismarck´s shells will surely doom Warspite.
by marcelo_malara
Fri Mar 17, 2006 3:20 pm
Forum: Hypothetical Naval Scenarios
Topic: Bismarck vs. HMS Warspite + HMS Exeter
Replies: 22
Views: 14313

The Bismarck would easily sink both ships. Warspite is not match for her, neither in armour nor in speed, and Exeter´s 8" guns has no chance of reaching the boilers.
by marcelo_malara
Thu Mar 16, 2006 10:17 pm
Forum: Naval Weapons
Topic: Submarine deck guns
Replies: 9
Views: 3333

Submarine deck guns

Anyone can tell if the steel employed in submarine guns is the same as in surface ships guns?, I mean it is exposed to the highly corrosive sea water, may be some form of stainless stell is used. Moreover, when the sub goes down, the bore remains open or it is made watertight?, and if so, the breech...
by marcelo_malara
Thu Mar 16, 2006 8:52 pm
Forum: Bismarck General Discussion
Topic: Bismarck 15" guns.
Replies: 49
Views: 17307

Don´t know the 20", but Campbell mentions a 21" experimental gun completed that had a 2200 kg shell. With respect to technology dictating policy, it comes even to this date. For example the development of ultra-accurate strategic missile guidance made the USA nuclear policy change from counter-value...
by marcelo_malara
Thu Mar 16, 2006 4:13 pm
Forum: Hypothetical Naval Scenarios
Topic: Bismarck with 3 triple turrets
Replies: 46
Views: 16356

Was Bismarck designed much before than Iowa and Yamato? I mean, may be when she was designed there was no way of building a BB so large.
by marcelo_malara
Thu Mar 16, 2006 3:31 pm
Forum: Hypothetical Naval Scenarios
Topic: Bismarck with 3 triple turrets
Replies: 46
Views: 16356

That will mean more displacement, meaning in turn more wetted area, which means more machinery which needs longer hull with more displacement yet. You will end in a ship much longer and heavier than Bismarck, like Iowa.
by marcelo_malara
Wed Mar 15, 2006 7:09 pm
Forum: Naval History (1922-1945)
Topic: U-Boots -------> US Subs???
Replies: 19
Views: 4850

Well, as far as I know the Walter closed cycle engine was studied in England, but discarded to put operationally.
As for the hull form, the Albacore is considered the "father" of the modern submarine´s hull form, don´t believe has much connection with the Type XXIII.
by marcelo_malara
Fri Mar 03, 2006 2:41 pm
Forum: Bismarck General Discussion
Topic: The Denmark Strait article map
Replies: 29
Views: 11194

Question : is anybody interested on knowing more about how to read the Nh 69729 and Nh 69730 photos in question ?
Your postings are always welcome Antonio, you know that.
by marcelo_malara
Thu Mar 02, 2006 2:09 am
Forum: Naval History (1922-1945)
Topic: German Battleshipbuilding program
Replies: 25
Views: 7578

Different policys I think. In the last years of the 19th century Tirpitz started building a powerfull fleet to compete with England, race which ended in fact in the First World War. But in the 1930s Hitler (who was an Army man) had no equivalent naval policy.
by marcelo_malara
Mon Feb 27, 2006 8:01 pm
Forum: Hypothetical Naval Scenarios
Topic: Yamato and Musashi vs. Missouri and Iowa
Replies: 55
Views: 31824

George is referring to the fact that at very long distances you have to wait for the shell time of flight, then spot the fall of the salvo, make corrections and shoot again. For example, the 18" gun of Yamato have a max range of 45000 yards, but the time of flight at that distance is 106 seconds. So...
by marcelo_malara
Wed Feb 22, 2006 10:20 pm
Forum: Naval History (1922-1945)
Topic: Hood: Battlecruiser or Fast Battleship?
Replies: 27
Views: 8216

I saw so in the Belfast.
by marcelo_malara
Wed Feb 22, 2006 7:48 pm
Forum: Naval History (1922-1945)
Topic: Hood: Battlecruiser or Fast Battleship?
Replies: 27
Views: 8216

You refer to the upper deck I presume...
by marcelo_malara
Mon Feb 20, 2006 6:57 pm
Forum: Naval History in General
Topic: French Navy on WWI and WWII
Replies: 9
Views: 6377

According to All the world´s battleships (Ian Sturton) all four originally Courbet class (Courbet, France, Jean bart and Paris) operated in the Mediterranean in WWI, escort and blocking tasks, no action. The Bretagne class (Bretagne, Lorraine and Provence) joined the fleet in 1916 and was asigned to...