Search found 1852 matches

by marcelo_malara
Tue Apr 22, 2008 11:41 am
Forum: Naval History (1922-1945)
Topic: RMS Titanic´s anniversary
Replies: 29
Views: 12644

Re: RMS Titanic´s anniversary

Robert: I am not saying that side damage is better than head-on damage. I said that what had to be done was trying to avoid the iceberg, that was the right choice. Titanic is 28 m wide, so as the stem is untouched, I would say that if the bow have turned just 14 m more they would have cleared it: th...
by marcelo_malara
Tue Apr 22, 2008 12:56 am
Forum: Bismarck General Discussion
Topic: Bismarck Speed
Replies: 624
Views: 73711

Re: Speed - Bismarck versus Scharnhorst/Gneisenau

Thanks, I just found it too (http://members.aol.com/ghe101/A_BASIC_PRIMER_ON_Hull_Shape.htm). So I would say that regardless the lenght/beam ratio (which is two-dimensional) both classes have equally sharp ends. What strikes me, is that your favorite (KGV) has a prismatic of 0.60, and the vaunted Io...
by marcelo_malara
Tue Apr 22, 2008 12:37 am
Forum: Bismarck General Discussion
Topic: Bismarck Speed
Replies: 624
Views: 73711

Re: Speed - Bismarck versus Scharnhorst/Gneisenau

The prismatic coeficient shows how fine is a hull, regardless of the lenght and beam, the lower the value the finer the ends. That for Bismarck is 0.55 (AOTS). Does anyone have the value for Scharnhorst?
by marcelo_malara
Mon Apr 21, 2008 8:14 pm
Forum: Hypothetical Naval Scenarios
Topic: Falklands/Malvinas war naval scenario
Replies: 42
Views: 9203

Re: Falklands/Malvinas war naval scenario

I discover today that Belgrano´s max speed was 18 kt, limited because of boilers and reduction gear condition. She was scheduled for a two month refit in March when she was called to duty. Don´t believe that two months would restore her to 30 kt condition, but sending an 18 kt cruiser to war is plai...
by marcelo_malara
Mon Apr 21, 2008 8:01 pm
Forum: Bismarck General Discussion
Topic: Bismarck Speed
Replies: 624
Views: 73711

Re: Speed - Bismarck versus Scharnhorst/Gneisenau

Dunmunro: I know you love the lenght/beam ratio, we have previousy discussed about it. I am not a naval architect, but I have read quiet a lot about ships, and nowhere have ever read that a lower ratio means a slower ship (reasonably close). In fact I am reading the book The search for speed under s...
by marcelo_malara
Mon Apr 21, 2008 3:42 pm
Forum: Hypothetical Naval Scenarios
Topic: Falklands/Malvinas war naval scenario
Replies: 42
Views: 9203

Re: Falklands/Malvinas war naval scenario

Reading the AWACS article in wiki, I noticed that the radar range is about 375 km (basically the distance to the horizon from 35.000 ft) for low flying aircrat and 560 km to high flying ones. They would have to be "stationed" very close to the islands to be of any utility (in fact patrolli...
by marcelo_malara
Mon Apr 21, 2008 11:52 am
Forum: Bismarck General Discussion
Topic: Bismarck Speed
Replies: 624
Views: 73711

Re: Speed - Bismarck versus Scharnhorst/Gneisenau

Bismarck is longer, which means a higher hull speed: it would be about 36.65 kt for Scharnhorst and 37.84 for Bismarck. That means less resistance at the same speed.
by marcelo_malara
Sun Apr 20, 2008 2:29 am
Forum: Hypothetical Naval Scenarios
Topic: Falklands/Malvinas war naval scenario
Replies: 42
Views: 9203

Re: Falklands/Malvinas war naval scenario

"Royal Air Force purchased 6 (later increased to 7) E-3D aircraft in December 1986. The aircraft are designated Sentry AEW1."

From http://en.wikipedia.org/wiki/E-3_Sentry.
by marcelo_malara
Sat Apr 19, 2008 9:02 pm
Forum: Hypothetical Naval Scenarios
Topic: Falklands/Malvinas war naval scenario
Replies: 42
Views: 9203

Re: Falklands/Malvinas war naval scenario

I don´t buy the AWACS theory. The plane would have to fly thru Brazil at least, and that country had friendly relations with Argentina. The same to Uruguay, they wouldn´t let British military to refuel there. And moreover, an E-3 is easily intercepted without escort. I acknowledge the Chilean suppor...
by marcelo_malara
Fri Apr 18, 2008 5:14 pm
Forum: Hypothetical Naval Scenarios
Topic: Falklands/Malvinas war naval scenario
Replies: 42
Views: 9203

Re: Falklands/Malvinas war naval scenario

If they had an AWACS (which has "look-down" capability) the low level attacks would have been detected, for example against the Sheffield and the Atlantic Conveyor.
by marcelo_malara
Fri Apr 18, 2008 4:33 pm
Forum: Hypothetical Naval Scenarios
Topic: Falklands/Malvinas war naval scenario
Replies: 42
Views: 9203

Re: Falklands/Malvinas war naval scenario

About the speed capabilities of the old ex-USN ships, I recently read in Conways Fighting Ships that the Belgrano was torpedoed while sailng at 10 kt. Can anyone confirm this?
by marcelo_malara
Fri Apr 18, 2008 3:51 pm
Forum: Bismarck General Discussion
Topic: 2,000 tons of seawater in Bismarck's forecastle!
Replies: 52
Views: 16493

Re: 2,000 tons of seawater in Bismarck's forecastle!

I would say that multiplying the surface of the compartments by the water depth in them. One cubit meter of water equals about one (metric) ton, which is close to the Imperial ton.
by marcelo_malara
Fri Apr 18, 2008 3:43 pm
Forum: Naval History (1922-1945)
Topic: RMS Titanic´s anniversary
Replies: 29
Views: 12644

Re: RMS Titanic´s anniversary

I disagree Robert, they have no way of knowing if they would hit or pass, in fact they almost avoided the iceberg, the stem didn't hit ice. They did their best.
by marcelo_malara
Fri Apr 18, 2008 1:04 am
Forum: Naval History (1922-1945)
Topic: RMS Titanic´s anniversary
Replies: 29
Views: 12644

Re: RMS Titanic´s anniversary

The witnesses testimonies that described the hull fracturing were dismissed as coming from no expert people. Those of the surviving crew describing the ship going down in one piece were kept.
by marcelo_malara
Fri Apr 18, 2008 12:41 am
Forum: Hypothetical Naval Scenarios
Topic: Falklands/Malvinas war naval scenario
Replies: 42
Views: 9203

Re: Falklands/Malvinas war naval scenario

why didn't Admiral Aneya try it? Well, Robert, I think that´s obvious, he didn´t consult me!!! Now, seriously: 1-I don´t know if the old destroyers had the 30 kt dash speed capability. they were almost 40 years old by then and I don´t know the state of boilers and turbines. 2-An operation of that k...