Search found 1853 matches

by marcelo_malara
Sun Mar 31, 2024 7:49 pm
Forum: Naval Technology
Topic: German light cruisers design: the aft turrets
Replies: 0
Views: 177

German light cruisers design: the aft turrets

Hi guys. An old question, which is the reason for the light German cruisers being built with two turrets aft?

Regards
by marcelo_malara
Sun Mar 24, 2024 5:19 pm
Forum: The Dreadnought Era (1906-1921)
Topic: Blucher in Dogger Bank
Replies: 23
Views: 4195

Re: Blucher in Dogger Bank

I own at least ten books by Friedman, starting with his first work, “Battleship Design and Development 1905-1945” published all the way back in 1978. However, my opinion of Friedman has unfortunately rather diminished over recent years. He seems to have developed (IMO) a serious case of compulsive ...
by marcelo_malara
Wed Mar 20, 2024 4:22 pm
Forum: Naval Weapons
Topic: dispersion of shells
Replies: 6
Views: 844

Re: dispersion of shells

Put it more simple, a bolt action rifle has dispersion.
by marcelo_malara
Fri Mar 08, 2024 5:21 pm
Forum: Books and Reference
Topic: Corsair in the War Zone
Replies: 11
Views: 3110

Re: Corsair in the War Zone

It seems there was more than one Corsair taken into service. One for the Spanish-American war, and this one for First World War, both owned by Morgan. Looking carefully at the pict, she does not seem to be a fast ship under sail, the masts look pretty short to extend much canvas, the booms do not lo...
by marcelo_malara
Sun Mar 03, 2024 5:37 pm
Forum: Books and Reference
Topic: Corsair in the War Zone
Replies: 11
Views: 3110

Re: Corsair in the War Zone

Literalman wrote: Sun Mar 03, 2024 3:59 pm The Corsair was steam powered and could make 19 knots!
Yes, she looks fast.

Image
by marcelo_malara
Tue Feb 27, 2024 7:09 pm
Forum: Naval History (1922-1945)
Topic: KMS BLUCHER
Replies: 19
Views: 12224

Re: KMS BLUCHER

As a general point looking at the chart it seems that iron and steel strengthen with small heat increases, so small fires would not be effective in unsettling the ship? However would the heat increase not expand the metal creating weaknesses there, such as bending or warping? Well, I took a graphic...
by marcelo_malara
Tue Feb 27, 2024 6:50 pm
Forum: Naval Weapons
Topic: Pom pom with director Mk IV vs Bofors 40mm with Mk 51
Replies: 36
Views: 4661

Re: Pom pom with director Mk IV vs Bofors 40mm with Mk 51

[ Take a look at the Kerrison Predictor: https://en.wikipedia.org/wiki/Kerrison_Predictor In your example the two predicted target locations would vary enough that no hits could be expected on the further target unless target's actual course was modelled accurately. Didn´t know that device, thanks ...
by marcelo_malara
Tue Feb 27, 2024 2:39 pm
Forum: Naval History (1922-1945)
Topic: KMS BLUCHER
Replies: 19
Views: 12224

Re: KMS BLUCHER

Thor managed to sink HMS Voltaire with gunfire alone, this is worth noting as Thor's guns were peashooters compared with the armament of light cruisers. Its often overlooked that the broadside of a hilfskreuzer was half that of a light cruiser, yet look at the damage Kormoran did to HMAS Sydney in ...
by marcelo_malara
Tue Feb 27, 2024 1:59 pm
Forum: Books and Reference
Topic: Corsair in the War Zone
Replies: 11
Views: 3110

Re: Corsair in the War Zone

RF wrote: Tue Feb 27, 2024 7:39 am Seeadler had an auxiliary engine. This raider sank three steamships, two of them overhauled with the wind against her, using the engine.
Ah ok, did not know that. Thanks!
by marcelo_malara
Tue Feb 27, 2024 3:32 am
Forum: Naval Weapons
Topic: Pom pom with director Mk IV vs Bofors 40mm with Mk 51
Replies: 36
Views: 4661

Re: Pom pom with director Mk IV vs Bofors 40mm with Mk 51

Tachymetric analog computers could predict target location accurately given accurate inputs; that was the whole point of it all. Where the computers failed was when the TOF was too long and the target's predicted location would no longer match it's actual location, due to target manoeuvring. Look a...
by marcelo_malara
Mon Feb 26, 2024 8:40 pm
Forum: Naval Weapons
Topic: Pom pom with director Mk IV vs Bofors 40mm with Mk 51
Replies: 36
Views: 4661

Re: Pom pom with director Mk IV vs Bofors 40mm with Mk 51

Yes, I f you have a continuous range to the target , via radar, then it's possible to accurately predict the target's location at the end of the projectile's TOF, but only if target motion is accurately modeled. I think that that is beyond the possibilities of the technology of the day. Somehow you...
by marcelo_malara
Mon Feb 26, 2024 4:41 pm
Forum: Naval History (1922-1945)
Topic: KMS BLUCHER
Replies: 19
Views: 12224

Re: KMS BLUCHER

Old rule, it is difficult to sink a ship by gunfire alone. For sure the torpedoes were the main culprit.
by marcelo_malara
Mon Feb 26, 2024 4:39 pm
Forum: Books and Reference
Topic: Corsair in the War Zone
Replies: 11
Views: 3110

Re: Corsair in the War Zone

RF wrote: Mon Feb 26, 2024 4:10 pm Shades of Seeadler here....
Yes! But Seeadler was a hunter, if the wind was contrary to prey she would not pursue. An escort would have to follow her sheep, independently to where the wind blow.
by marcelo_malara
Mon Feb 26, 2024 3:16 pm
Forum: Naval Weapons
Topic: Pom pom with director Mk IV vs Bofors 40mm with Mk 51
Replies: 36
Views: 4661

Re: Pom pom with director Mk IV vs Bofors 40mm with Mk 51

2) With continuous radar ranging the GRUB (computer could (and must) calculate true target motion otherwise radar ranging would actually make predicted target position more inaccurate, So you mean that if in the second sweep the radar detects the plane closer (or farther) to the ship the computer w...
by marcelo_malara
Mon Feb 26, 2024 3:10 pm
Forum: Books and Reference
Topic: Corsair in the War Zone
Replies: 11
Views: 3110

Re: Corsair in the War Zone

The Corsair in the War Zone by Ralph Delahaye Paine is a recently added book on Project Gutenberg ( https://www.gutenberg.org/ebooks/72760 ). The Corsair was J.P. Morgan's yacht, offered for and accepted into naval service during World War I. The ship escorted convoys (mainly in the Bay of Biscay),...