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heuhen
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: December 20th, 2017, 11:20 pm
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Regardless of the quality, I am interested to see what you have in store for us, huehuen!
...heuhen ;)

A little overkill, but I wanted it to be different

C-Class

design based on Norwegian A-class submarine just made larger..., an added some extra equipment. Larger than most, where cost is not so important, using untested ideas early in a try aa fail procedure!

Interior design:

-the biggest section of the pressure hull have 2 full deck and a battery deck, but in rest of the ship except engine room and torpedo room/magazine it's 1 deck and battery deck.

-Torpedo room are one big room that are going over 2 decks, the magazine allone can hold 18 torpedos with space for 8 more if needed where 3 torpedo have to be stored on the torpedo tube deck.
between the torpedo tubes/magazine and the turret there is crew berthing for both enlisted and officers. mess hall are toward aft in the ship
magazine are stored in a protected room in the keel, it's a very tight room and only the smallest of the crew members can work there.

-command deck is placed in the center of the ship, aft of main turret. It consist of a: non-pressurized bridge deck in the sail, a weather deck on top of the sail, and a command deck in the pressurized hull. there is also an lower command deck, it is only used as an emergency deck, where you can control the submarine mechanically.

-Aft submarine consist of engineering: here you can find diesel engines and generators and electric motors, the engine room is an open room that is going over 2 deck. with one of the 3 battery banks.
-Aft and above the engine room, is the 400 mm torpedo room, it's a small room.

-The sail have a bridge deck, and an Hangar, the Hangar are big enough for an larger airplane, but would normally carry two, tiny short range airplane. In peacetime the submarine carry a VIP-boat instead of an airplane.



[ img ]

Class overview
Type: Cruiser Submarine
Planed: 1915-1920
Build: 1921-1923
Commission: 1925-1942
Completed: 6

General characteristics
Displacement:
Surface: around 3800 tons
Submerged: 4700 tons
Length: 115.7 m (379 ft 6 in)
Beam: 9.3 m (30 ft 5 in)
Draft: 6.4/0 m (21 ft)

Propulsion:
Diesel-electric
4 diesel engines tot. 9000 hp
2 electric engines tot. 4000 hp
2 screws

Speed:
Surface: 22 knots (trail speed: 24 knots)
Submerged: 10 knots

Range:
13,500 nm at 12 knots (surfaced)
150 nm at 6 knots (submerged)

Dive depth:
Max depth: 180 m
Test depth: 230 m

Complement:
12 officers
80 Enlisted

Armament:
1x twin modified 155 mm Bofors turret
1x single 4 in Mk V (modified)
12x railing mounted/handheld from 4 to 8 mm machine guns of various types, in addition to 2x sniper rifle
8x bow 21 in (533 mm) torpedo tubes
- in tubes: 8x 21 in (533 mm) torpedos
- magazine: 18x 21 in (533 mm) torpedos (Standard) space for additional 8
4x Aft 16 in (400 mm) torpedo tubes
- in tube: 4x 16 in (400 mm) torpedos
- magazine: 6x 16 in (400 mm) torpedos
With modification, can carry and deploy mines and store mines in hangar, up to 16 mines (8 on aft deck, single row)


2 in deck lifeboat

Build with hangar for 1 large airplane or 2 tiny airplane, used in peacetime to store an large VIP-boat


Last edited by heuhen on December 20th, 2017, 11:29 pm, edited 1 time in total.

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erik_t
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: December 20th, 2017, 11:27 pm
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3800 tons... maybe 13,000shp if you somehow ganged the electrics and the diesels together... 29 knots on trial?

The nearly-as-long, much finer K-class made 24 knots surfaced on 21,000shp.


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heuhen
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: December 20th, 2017, 11:28 pm
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erik_t wrote: *
3800 tons... maybe 13,000shp if you somehow ganged the electrics and the diesels together... 29 knots on trial?

The nearly-as-long, much finer K-class made 24 knots surfaced on 21,000shp.
editing and thanks for keeping me down :D

Changed it to 22 knots (24 knots trail speed) and 10 knots cruise speed

I was going to hold it under 100 meter, but then I just got carried away.... I can still do it, change the forward turret with a 4in open mount and remove the hangar and make the sail a bit smaller

Note: displacement, i based it on the French submarine Surcouf, and since mine is a little longer I just added some extra tonnage to the data.
https://en.wikipedia.org/wiki/French_submarine_Surcouf


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heuhen
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: December 21st, 2017, 12:07 am
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An alternative version, that I just did fast, by modifying the last drawing:

[ img ]

Data on it shouldn't differ to much from that era of submarines. I can just add in that she have 6x 533 mm forward tubes and 4x 400mm aft tubes and 2x 4 in guns and 1x 3 in gun


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ABetterName
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: December 24th, 2017, 3:55 am
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[ img ]

[ img ]

Laid down: 1938

Displacement: 3,300 tons surfaced, 4,500 tons submerged

Propulsion: 2x direct drive 6 cylinder diesel engines totaling 3,000-3,500 shp, 2x electric motors totaling 2,400 shp

Speed: 16 kts surfaced, 8 kts submerged

Range: 9,000 nmi at 10 kts surfaced, 100 nmi at 4 kts submerged, 18,000 nmi with fuel in main ballast tanks

Test depth: 150 m

Armament: 1 aircraft (carrying bombs, aerial mines, or one torpedo), 6x 21" torpedo tubes (4 bow, 2 stern, 16 torpedoes in reserves), 1x 152mm wet mount deck gun, 2x 13.2mm MG, 25x naval mines internal tubes, 40 external

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[ img ]


Last edited by ABetterName on March 22nd, 2018, 4:32 pm, edited 3 times in total.

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Charguizard
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: December 28th, 2017, 12:59 am
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I like what's being posted a lot.
Heuhen, I know your sub was supposed to be a quick job, but I'd like to point out a stray pixel above the gunhouse of the first drawing, and AFAIK guns have to be drawn horizontal unless they're not capable of elevating like that. I find the subs themselves very attractive so I'd like it if you would give them another look.

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Krakatoa
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: December 28th, 2017, 7:34 am
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Based on the M-Class the Magnificent and its 3 sisters were built to operate from Singapore out into the Pacific and Indian Oceans where the Royal Navy did not have a large presence.

With a twin 7.5" turret aft and a hangar for one aircraft forward, the hull had to be quite beamy and longer to take the large amount of topweight that had been added to what had been originally a K-Class hull design. The extra length allowed for a bigger diesel installation and battery complement so that it might make 18 knots surfaced and 8 knots submerged. Those speeds gave the boats enough of a leeway to catch most merchantmen and only the faster 'liner' types would have the speed to escape.


[ img ]


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Blackbuck
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: December 29th, 2017, 1:06 am
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Something else from me...

[ img ]

The S-81 class turned out to be the most numerous class of submarines ever constructed by the Galenic Navy with 48 boats being built in three distinct batches (plus minor sub-batches). They were large ocean-going threats designed to be large enough and capable enough to operate alone in the face of an expansionist driven Dayashinan navy without reinforcements from other naval units.
They drew upon previous experience with large boats, namely the 29, 56 and 63 classes all of which were built for deep ocean work. As designed S-81 featured a single gun but this was amended in the design phase to a pair, one fore and one aft of the sail. They would all see service during the Pan-Septentrion War some more extensively than others, eight would be come wartime losses. After the war the remaining vessels were rationalised with the batch one and two vessels being mothballed then scrapped whilst the best of the batch threes were modernised losing their guns and gaining a new sail structure, later they would also be streamlined and quietened giving good service until replaced by newer vessels in the early sixties.

Statistics
Displacement:
-1,550t surfaced
-2,465t submerged
Dimensions:
-L 96.5m
-B 9.2m
-D 5m
Propulsion (as-built):
-4x Paxman diesel engines, ~1,490hp ea.
-2x Paxman auxiliary generators, ~350hp ea.
-4x electric motors geared to two shafts, ~625hp ea.
-2x 120-cell battery banks
Performance:
-21 knots surfaced
-9 knots submerged
-23,610km @ 10 knots on the surface
-180km @ 2 knots submerged
-Test depth: 95m
Manning:
-6 Officers
-54 Enlisted
Armament (all-vessels):
-6x 550mm TTs 4 fore, 2 aft (18 torpedoes)
-6x 550mm TTs 2 fore, 4 waist (6 torpedoes)
-2x or 1x 130mm/50 latterly 130mm/30
-1-2x Bofors 25mm/64 or 40mm/56 depending on batch and date
-2-4x Hispano 23mm or 30mm depending on date

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RegiaMarina1939
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: December 29th, 2017, 1:28 am
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Nice work everyone, love to see this thread still going!

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BB1987
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: December 29th, 2017, 10:47 am
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Just for record, there is some kin of deadline for entries? I'm wondering if it's time-fleasible to attemp landing something here or not.

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