Search found 1855 matches

by marcelo_malara
Sun May 27, 2007 12:14 am
Forum: Naval History in General
Topic: Admiral Zheng He (Cheng Ho) treasure ship design
Replies: 47
Views: 78227

water-tight compartments (also for keeping live fish and for bathing), and triple rudders. Large models in museums, and also sold as a kit by Trumpeter, give dimensions that are bizarre; at 1:1250, the model would come out to approximately 12 cm LOA, 12 cm keel to truck, and a beam of 4.9 cm! There...
by marcelo_malara
Sat May 26, 2007 11:14 pm
Forum: Naval History Post-1945
Topic: May 25 1982
Replies: 27
Views: 27263

Yes, I heard that many times, but I am not sure, in fact I think nobody can say that for sure. The Exocet sustainer burns for 150 s (see http://www.fas.org/man/dod-101/sys/missile/row/exocet.htm), so that at a speed of 300 m/s means that it will be totally depleted after 45km. I don´t know the exact...
by marcelo_malara
Fri May 25, 2007 3:16 pm
Forum: Naval History Post-1945
Topic: May 25 1982
Replies: 27
Views: 27263

Thanks Robert. As usual I am surprised by your knowledge of Latin America, I hope someday you pay a visit to us. The Falklands/Malvinas war is almost forgotten here, the only day remembered is April 2dn, the landing itself. I believe that today the Atlantic Conveyor was sunk too, in the same attack ...
by marcelo_malara
Fri May 25, 2007 3:04 pm
Forum: Naval History (1922-1945)
Topic: Ships shooting themselves
Replies: 21
Views: 6899

No Robert, it is a physical concept applied in meteorology, but as the shells are under the influence of the Coriolis force as well as the winds, I presume it must apply too.
by marcelo_malara
Thu May 24, 2007 9:50 pm
Forum: Naval History (1922-1945)
Topic: Ships shooting themselves
Replies: 21
Views: 6899

You can't make them keep going round in circles in the horizontal sense. In fact you can. Theoretically if you fire a shell at enough velocity, the Coriolis force would make it describe an horizontal curve such that it will reach a position close to the launching point. It is called inertia circle.
by marcelo_malara
Thu May 24, 2007 9:46 pm
Forum: Naval History (1922-1945)
Topic: Ships shooting themselves
Replies: 21
Views: 6899

Normally bullets or shells are fired on a linear trajectory, they won't do a complete circle so you get shot by your own bullet in the back of your head.... Every bullet is fired in a linear trajectory, even the round-the-corner weapon. The difference is that the trajectory line in this case is at ...
by marcelo_malara
Thu May 24, 2007 4:36 pm
Forum: World Navies Today
Topic: Ranking European best navies today
Replies: 24
Views: 11774

And that´s the lack that the rest of Europe today has. How do you expect the Germans to sink Belgrano or the French to land in the Falklands if they were not able to stop genocide in Kosovo? Serbia was their backyard and they did nothing at all! There was not will of stopping the killings there, be...
by marcelo_malara
Thu May 24, 2007 4:33 pm
Forum: Hypothetical Naval Scenarios
Topic: Bismarck armed with 11-inch guns
Replies: 29
Views: 10686

Napoleon once stated: "defensive warfare´s only outcome is defeat". A fleet in being is absurd.
In my opinion a fleet in being is not defensive warfare but a permament menace to the enemy, telling him that the attack can come any moment.
by marcelo_malara
Thu May 24, 2007 3:33 pm
Forum: Naval History in General
Topic: Admiral Zheng He (Cheng Ho) treasure ship design
Replies: 47
Views: 78227

I think that the problem with the vikings is that the discovery was not carried on with long time settlements, so the fact that they came first was forgotten.
by marcelo_malara
Wed May 23, 2007 3:35 am
Forum: Hypothetical Naval Scenarios
Topic: KG 5 class underestimated?
Replies: 116
Views: 44963

So the 15" is 10% better.
by marcelo_malara
Tue May 22, 2007 11:18 pm
Forum: Hypothetical Naval Scenarios
Topic: KG 5 class underestimated?
Replies: 116
Views: 44963

Here's the penetration in inches (KM/RN armour) from Naab: 14" 15" range (yds) 21.2 22.8 10k 17.9 19.3 15k 15.2 16.4 20k 13.2 14.1 25k Duncan: Are you aware that the penetration numbers you posted don´t agree with navweapons? I know that the source is arguably, but why would your source b...
by marcelo_malara
Tue May 22, 2007 3:23 am
Forum: Hypothetical Naval Scenarios
Topic: KG 5 class underestimated?
Replies: 116
Views: 44963

If Bismarck had been given KGV's guns, the weight saved would have allowed a 4 shaft machinery layout, yet Bismarck's offensive capabilities would not have suffered, Sorry, one last time, can you please justify why the 14" is at least equal to the 15"? Are you aware of the problems the Br...
by marcelo_malara
Tue May 22, 2007 12:54 am
Forum: Hypothetical Naval Scenarios
Topic: KG 5 class underestimated?
Replies: 116
Views: 44963

Hood and Bismarck date from different eras and their technology is vastly different. Yes, but the Germans designers stayed with a 3 shaft configuration, which limited the power output against a 4 shaft ship. All in all, a 4 shaft would at most have added 2 knots, at the price of protection. My conc...
by marcelo_malara
Mon May 21, 2007 12:33 pm
Forum: Hypothetical Naval Scenarios
Topic: KG 5 class underestimated?
Replies: 116
Views: 44963

BS made 28.34 knots at 117,400 SHP at 75% load (maybe 48.5k tons) Hood made 28.4 knots at 112,480 SHP at 44.6k tons BS was heavier in the test and shorter, and they made the same speed with less than 5000 hp difference. I still don´t see the penalty of the beamier hull. Hood made 31.88 knots at 152...
by marcelo_malara
Mon May 21, 2007 3:28 am
Forum: Hypothetical Naval Scenarios
Topic: KG 5 class underestimated?
Replies: 116
Views: 44963

Beam influence in resistance

28.3 knots at 115k SHP for Bismarck To illustrate my previous quoting of D.K. Brown, I offer the followig data. BS is 36 m wide, Hood is 31.7. BS made 28.3 kt at 115000 hp (collected by someone in this thread), Hood made 28.4 kt at 112480 hp (from AOTS Hood). So where is the big disadvantage in bei...