Big Gun submarines

Boxman

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covert_shores said:
HMS X-1 (not an X-Craft!!!) built in 1920s. The guns were only 5.2" but mounted in twin enclosed turrets. For a time she was the largest submarine in the world. Very cool boat.

The British K-Class is also worth a look in, definitely cruiser submarines although the guns are less big.
Here is almost nine minutes of British Pathe newsreel footage of the Royal Navy's "submarine cruiser" HMS X.1 at sea, circa 1925.

YouTube: British Pathé - "The Undersea Battleship Arrives (1925)" - FILM ID:372.09
https://www.youtube.com/watch?v=f-QQtjqYo6Q
 

Foo Fighter

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K class were 'fleet' boats, not cruiser submarines. Their task was screening the surface ships. Stick to 'M' class.

Not having a go at anyone, pointing out an error is all.
 

Kevin Renner

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I've wondered if it would of been possible to mount a self contained rocket launch system using the shore bombardment rockets employed in WWII amphibious landings on a Gato Class and use them for attacking Japanese held islands with the object of targeting airfields. If possible it would be a lot cheaper than employing a carrier with it's surface group. Fire off the rockets. Submerge, cast off the rocket pod and let it sink. The sub then goes off to do what subs do.
 

GWrecks

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Kevin Renner said:
I've wondered if it would of been possible to mount a self contained rocket launch system using the shore bombardment rockets employed in WWII amphibious landings on a Gato Class and use them for attacking Japanese held islands with the object of targeting airfields. If possible it would be a lot cheaper than employing a carrier with it's surface group. Fire off the rockets. Submerge, cast off the rocket pod and let it sink. The sub then goes off to do what subs do.
Didn't that one Soviet amphibious assault submarine have a bunch of rocket tubes for shore bombardment?

I forget the source that said that, though. GlobalSecurity maybe?

EDIT: Think it was Project 621 - the first well-known amphibious assault submarine proposal.
 

Grey Havoc

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Wurger said:
How is your mastery of the beatiful italian language? Please read:

http://www.marina.difesa.it/conosciamoci/editoria/marivista/Documents/2011/12_dicembre/breve_storia_del_sommergibile_cannoniere.pdf

Any appreciation of artillery submarines would be extremely incomplete if the german examples (and there are plenty) weren`t mentioned. Mind especially pages 53 to 58, with a proposed U-Kreuzer (more than 7000 tons) with two single turrets, each with a 210mm cannon. It stemmed from Professor Oswald Flamm who, besides submarines, designed torpedos. It was to have a trilobed hull, a simplification of it (lazy 8) being present in the japanese I-400.
There was also another U-Kreuzer (Type XI) designed around 1937-38, with two twin turrets utilizing the 12.7 cm/45 SK C/34 gun (5 inch, or 127mm). Six torpedo tubes, four forward and two rear. Was intended to be able to carry a single Ar 231 spotter aircraft. Compliment 110 crew and officers. Four were ordered from the AG Weser yard in Bremen in early 1939, but only one (U-112) had been laid down at the outbreak of WWII and the rest were shelved. U-112's fate is uncertain, though there have been unconfirmed reports that she was requisitioned by & completed for the Sicherheitsdienst for use in cloak and dagger operations.
 

airman

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The Dutch submarine concept of 1943-1944 about a 1,125 tons submarine armed with 2 cannon of 2,4 inch
all technical data on

http://www.hisutton.com/Dutch_WW2_Subs.html
 

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covert_shores

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Thanks for the reference to my site!

Yes, what I think is most interesting about the Dutch designs is a) triple-hull b) omission of Dutch snort mast. By then big gun subs were less credible anyway
 
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