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by marcelo_malara
Mon Jun 25, 2012 12:57 am
Forum: World War II
Topic: A What-If on Liquid v. Air cooled/Radial v. Vee v. inline.
Replies: 6
Views: 1775

Re: A What-If on Liquid v. Air cooled/Radial v. Vee v. inlin

There are two more things. Liquid cooling better preservates the engine, as que cylinder is cooled more even than a radial engine cylinder, which has hot spots that are difficult to deal with. The radial has an additional requirement in the machining of the cooling fins, which are machined from a so...
by marcelo_malara
Fri Jun 08, 2012 6:50 pm
Forum: Naval Technology
Topic: Flamm submarines hull.
Replies: 8
Views: 2628

Re: Flamm submarines hull.

Sorry, the book I mentioned above is "The U-Boat: The Evolution and Technical History of German Submarines" (Rossler), originally a German book translated to English. The author describes in detail the process of Type XXI assembly, and mentions the system was adopted for Type XXI as part o...
by marcelo_malara
Fri Jun 08, 2012 6:05 pm
Forum: Naval Technology
Topic: Flamm submarines hull.
Replies: 8
Views: 2628

Re: Flamm submarines hull.

Don´t think so, the prefabrication started with the Type XXI, not before.
by marcelo_malara
Fri Jun 08, 2012 5:41 pm
Forum: Naval Technology
Topic: Flamm submarines hull.
Replies: 8
Views: 2628

Re: Flamm submarines hull.

May be, in this case two circles are side by side near the deck and one near the bottom, what gives the hull a rough triangle section, the sides composed by the sweeps of the circles. I am reminded of scanning the image...

Regards!
by marcelo_malara
Fri May 18, 2012 5:51 pm
Forum: Naval Weapons
Topic: Explosion of shells
Replies: 19
Views: 6190

Re: Explosion of shells

That´s right Robert, an object striking the water at 500 m/s is almost the same as striking earth or rock, people falling to the water from 50 m height can die.
by marcelo_malara
Fri May 18, 2012 1:44 pm
Forum: Naval Weapons
Topic: Explosion of shells
Replies: 19
Views: 6190

Re: Explosion of shells

Yes, they explode, there are many instances of splinter damage from a nearby impact.

Regards
by marcelo_malara
Tue May 08, 2012 3:20 pm
Forum: The Dreadnought Era (1906-1921)
Topic: Sinking a Dreadnought Battleship
Replies: 3
Views: 3161

Re: Sinking a Dreadnought Battleship

Hi Frost. You can do the work spectacularly, setting of a charge in one of the shell rooms (bow or stern), and blow the ship like HMS Barham did in the Med, or open sea cocks (water entrances located in the bottom) and let her sink slowly.

Regards
by marcelo_malara
Wed Apr 25, 2012 2:33 am
Forum: Bismarck General Discussion
Topic: Cost to build the Bismarck
Replies: 20
Views: 9955

Re: Cost to build the Bismarck

Bearing in mind that just 10 countries built (or have built by others) Dreadnought warships, 1.3 billions seems a little low.

Regards
by marcelo_malara
Thu Apr 19, 2012 10:16 pm
Forum: Naval Propulsion
Topic: Graf Spee Diesel Engines
Replies: 28
Views: 20039

Re: Graf Spee Diesel Engines

Hi Robert. You are right, we are not so much behind, but anyway both countries have more pressing needs than raising the ship. A scandal would erupt if much money is wasted in the salvage operation.

Regads
by marcelo_malara
Thu Apr 19, 2012 10:13 pm
Forum: Movies, Films, Documentaries and Games
Topic: Ship data statistics needed
Replies: 5
Views: 1772

Re: Ship data statistics needed

Yes, some info may need to be obtained from other sources. I can not think of any single source that has all you want. Moreover, the armouring scheme is also important, a plate thickness figure will not do in some cases.
by marcelo_malara
Mon Apr 16, 2012 12:36 pm
Forum: Movies, Films, Documentaries and Games
Topic: Ship data statistics needed
Replies: 5
Views: 1772

Re: Ship data statistics needed

You need to buy Jane´s Warships of WWII. It is a reprint of the contemporary Janes´, it contains some mistakes due to the secrecy of the belligerants, but it has sketches with the armour and firing arcs of most warships of the period.

Regards
by marcelo_malara
Mon Apr 16, 2012 12:21 pm
Forum: Naval Propulsion
Topic: Graf Spee Diesel Engines
Replies: 28
Views: 20039

Re: Graf Spee Diesel Engines

Hi Noel, I did receive your mail last year but I was really in a hurry and couldn´t spare much time. I am glad you have been to Argentina, next time do not hesitate in contacting me so we can meet. Regarding the Spee, I doubt it will ever be raised, or will ever be some major part recovered. Argenti...
by marcelo_malara
Wed Apr 11, 2012 4:53 pm
Forum: Naval Technology
Topic: Flamm submarines hull.
Replies: 8
Views: 2628

Re: Flamm submarines hull.

According to "The German U-boat" his designs consisted of a three circle section, I will try to scan one image of that type of hull.
by marcelo_malara
Wed Apr 11, 2012 4:16 pm
Forum: Naval Propulsion
Topic: Warship Shafts
Replies: 3
Views: 1962

Re: Warship Shafts

The Bismarck shafts are angled to the ship centreline, I don´t remember the exact angle now.

Regards
by marcelo_malara
Wed Apr 11, 2012 3:43 pm
Forum: Naval Propulsion
Topic: Graf Spee Diesel Engines
Replies: 28
Views: 20039

Re: Graf Spee Diesel Engines

Hi guys, thanks to all for the updates on this post and to Noel for bringing them to my attention (some months ago!).

I am still curious about Herr Nilson scanning, is there more info on this?

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