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RegiaMarina1939
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: December 29th, 2017, 4:22 pm
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BB1987 wrote: *
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.
No, as of right now there is no deadline. I gladly look forward to anything you have to submit!

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heuhen
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: December 29th, 2017, 4:51 pm
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Charguizard wrote: *
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.
stry pixel i can fix

the gun, you are referring to the 3In HA gun, that gun is drawn like that on official partsheet. Thus it should look like that


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BB1987
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: December 30th, 2017, 6:27 pm
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Here is my take, from Koko, obviously :mrgreen:

During the late 20's as part of their submarine buildup project, Koko no Kaigun came up requesting a design for a large ocean-going cruiser submarine to supplement the small and medium boats being built and designed during the decade. Requirements called for long range, heavy armament and spotting capabilities optimized for SubRon leader duties and prolonged solitary deployments. The resulting design was the largest submarine ever put into paper for Koko no Kaigun up to that point, and would remain so for over a decade.
As planned the boat would have been 109,9m long, 9,7m abeam and with a surfaced draft of 5,9m. All for a displacement of 2.847t surfaced and 4.214 submerged. Poweplant was intended to be two diesel-electric motors capable of generatin 8.600shp surfaced and 3.000 submerged, allowing for a top speed of 18knots above the surface and 8knots below. Fuel bunkers allowed for an endurance of 17.500 nautical miles (32.410km) at 10knots, while on batteries they could travel submerged for 70nautical miles (130km) at 3knots. Some of the ballast tanks could have also been double-used as extra fuel bunkers, extending the range to 21.000 nautical miles (38,892km) if ever needed. Design depth was 140m, with test depth set at 80m. Armament wise, the submarines would have been fitted with two 120mm/45 Type11 guns in single mounts, one for and one aft of the sail, plus a single 13mm/76 Type93 machine gun. A total of eight 533mm torpedo tubes were also planned, six at the bow and two at the stern, with a full complement of 24 warheads carried. Finally, aircraft facilities with a catapult and a small hangar to carry and operate a single Yokosuka E6Y1 floatplane were to occupy most of the quarterdeck. 86 men (8 officers plus 78 enlisted) would have manned the submarine, plus two mechanics, one pilot and one obesrver to man the reconnaissance plane and aircraft facilities, for a grand total of 90.
The design was finally approved in late 1929, with the order placed for at least two boats (with Koko no Kaigun planning to order more if the sea trails would have resulted successful), to be laid down by the end of 1930.
The project was eventually killed by the ratification of the London Naval Treaty, which put the entire Koko no Kaigun submarine buildup program to a complete stop for more than three years (construction of large-sized units wouldn't even resume until five).

[ img ]

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-Koko Kyouwakoku (Republic of Koko)
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RegiaMarina1939
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: January 7th, 2018, 3:52 pm
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Sorry for late response. It looks awesome! Nice backstory. I’ll take the opportunity here to say that after this entry everyone has 5 days to post any entries they may have in the works before the challenge is closed and judges begin the voting process. Judges will be picked on discord.

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APDAF
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: January 8th, 2018, 9:29 pm
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Here is the first major post-Great War submarine of the Rheinland Kasierliche Marine the UK class of 1922.

[ img ]

Length: 127.55 meters
Draught: 7.15 meters
Beam: 9.30 meters

Displacement: 3,700 surface 4,100 submerged
Propulsion: 2x 3,500 HP diesel engines with 2 x 1200 HP electric motors
Speed: 22 knots surfaced 8.5 knots submerged
Range: 20,000 nautical miles at 9 knots surfaced, 130 nautical miles at 3 knots submerged
Test depth: 85 meters

Guns: 3 x 15 cm SK L/45 with 200 rounds per gun
Torpedoes: 4 forward and 2 aft 50cm torpedo tubes with space for 3 reloads per tube

Crew: 70 men 60 enlisted and 10 officers


Last edited by APDAF on January 26th, 2018, 5:08 pm, edited 1 time in total.

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ABetterName
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: January 8th, 2018, 11:10 pm
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Here's a little addition to my entry.

[ img ]

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RegiaMarina1939
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: January 19th, 2018, 1:36 am
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Hello everyone and sorry for the late post, we have picked judges on the discord (colosseum and acelanceloet have agreed to judge) and the challenge is now formally closed. A special thanks to ABetterName for making the category spreadsheet for the judges and thanks to everyone who participated. Either myself or one of the judges will post a message here when we have reached a verdict on who is to be the winner. This has been a successful thread and I appreciate everyone who posted!

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RegiaMarina1939
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: January 19th, 2018, 9:55 pm
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As per judge's requests the entries have all been grouped onto the original post, and are grouped chronologically except for anyone who posted more than one entry, in which case they are grouped together. Winners will be announced as soon as the judges have completed their evaluation of the entries.

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Charguizard
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: February 22nd, 2018, 6:12 pm
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Regia get some judges already pleeeease.

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ABetterName
Post subject: Re: Interwar Cruiser Submarine Design ChallengePosted: March 22nd, 2018, 11:03 pm
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With Regia-chan being lazy/busy/whatever Regia-chan's excuse is this time, I took over to get this challenge done and judged. Our judges were Acelanceloet and Gollevainen, giving each design 0 to 10 points in the following categories (except for Golly):
Feasibility
Looks
Reliability
Surface Performance
Underwater Performance
Contextual Performance
Trade Interdiction Ability
Drawing Quality

With that established, the winners of this challenge are ABetterName and Blackbuck, tying for the top position with 83 points.

ABetterName - Challenger: 83 points
Blackbuck - S-81: 83 points
Shigure - V-78: 81 points
Charguizard - Capitan Spoerer: 79 points
Lazer_one - Galeazzi's Project: 79 points
BB1987 - Cruiser Submarine Project: 78 points
Blackbuck - S-29: 78 points
Reytuerto - Acre: 78 points
Voyager989 - Morowong: 77.5 points
RegiaMarina1939 - 1925 Cruiser Submarine Study: 74.5 points
Heuhen - C #2: 74 points
Free Peoples Navy - Tilefish: 63 points
Krakatoa - M Class: 60 points
Heuhen - C #1: 58 points
JSB - I-123: 55 points

The scoring sheet

This challenge is (finally) officially over.

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[ img ]


Last edited by ABetterName on March 22nd, 2018, 11:23 pm, edited 2 times in total.

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