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eswube
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: May 12th, 2015, 7:53 pm
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Great additions! :)

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Hood
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: May 13th, 2015, 7:42 am
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Nice work!
Nice to see some auxiliaries coming along in this AU.

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Rodondo
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: May 13th, 2015, 8:01 am
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Damn nice work there!

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BB1987
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: May 14th, 2015, 4:39 pm
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Shion Class Destroyer (Part 1, 1923-1930):

After the WNT was signed, 21 of the planned Sato class Destroyers were canceled and reordered as two new classes: 15 of them went up to form the Shion class. The Shion were smaller than the previous Sato, Kuchikukan 14 and Kuchikukan 10 units, the Naval Staff intended to provide with relative ease and cost savings a class suited for coastal operations. Blue-water and capital-ship escort duties would have been performed by the larger Okaze class, whose construction paralleled that of the Shions.
To cut design time and start construction as soon as possible, the Shion class ended up beign nothing more than a Japanese Wakatake with minor modifications, the only one beign truly recognizable was the bridge beign slighly different in shape and having more windows around it. The ships were armed with three single 120mm/45 Type3 single guns ins hielded positions and two twin 533mm torpedo launchers. Two 7.7mm machine guns were also carried, and the ships had the capability to fit 20 mines on board for minelaying operations. Despite beign planned as a coastal unit, the Shion, with her 36-knot top speed and 3.000 nautical mile endurance at 15-knots, was both the fastest and most durable destroyer Koko no Kaigun had at that point. four ships were built at Kousaten Navy Yard, nine at Toumachi Naval arsenal and Two at the civilian Yamatogawa Shipyards. Shion, the lead ship, was laid down in July 1922 and was in service by 1923, her sisters followed by 1927.
[ img ]
The last four units, Ajisai, Karukaya, Suzuki and Kuroda, recieved the newer 120mm/45 Type10 guns, which, having a maximum elevation of 70° effectively served as bot surface and AA guns. Also, they sported depth charges instead of the mine-laying gear of the earlier sisters.
[ img ]
The fifteen sisters formed four Kuchikutai units (three 4-unit and one 3-unit) until their refit during the mid-30's


Ships in class: (laid down-launched-commissioned - fate)

shion 1922 1923 1923 - ?
omodaka 1923-1923-1923 - ?
botan 1923-1924-1924 - ?
basho 1923-1924-1925 - ?
nadeshiko 1923-1924-1924 - ?
kikyo 1923-1924-1925 - ?
yuri 1924-1925-1925 - ?
ayame 1924-1925-1925 - ?
kaido 1924-1925-1926 - ?
kakitsubata 1924-1925-1926 - ?
tsutsuji 1924-1925-1925 - ?
ajisai 1925-1926-1927 - ?
karukaya 1925-1926-1926 - ?
suzuki 1925-1927-1927 - ?
kuroda 1925-1927-1927 - ?


part 2 following at a later, unkwnown, date.

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Last edited by BB1987 on May 14th, 2015, 6:58 pm, edited 5 times in total.

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emperor_andreas
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: May 14th, 2015, 5:45 pm
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Very nice work!

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eswube
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: May 14th, 2015, 6:50 pm
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Good work, keep it up. :)

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BB1987
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: May 16th, 2015, 10:49 am
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Okaze Class Destroyer (Part 1, 1923-1930):

To supplement the 15 smaller Shion class Destroyers the naval staff reordered the last 6 ships of the canceled Sato class to a larger design: the Okaze Class. As for the Shions, in order to have the new units in service as soon as possible Okaze and her sisters were just slightly modified Kamikaze class Destroyers. Modifications included the addition of walkways that linked the bridge with the middle gun and searchlight platform, and a slighly different and better enclosed bridge structure. Armament consisted of four Type3 120mm/45 guns in single mounts, six 533mm torpedo tubes in three sets of double launchers and two 7.7mm machine guns. The ships were equipped to carry up to 20 mines if needed. Four Kampon boilers powered two-shaft geared turbines at 38,500 shp, giving the ships a top speed of 37knots and an endurance of 3.600 natical miles at 14 knots.
The lead ship, Okaze, was laid down in august 1922 and commissioned by fall 1923. Her perfomance was considered so satisfactory that another twelve units were immediately ordered, bringing the class to 18 ships. At the cost of 47 more tons in displacement when compared tot he Sato class (and 73 to the Kuchikukan 14 units), the Ozake sported the same armament but enyoyed 1,5 times more range and a nearly 3-knots higher top speed, all in a shorter and sturdier hull, more suited to blue water operations.
All ships were built between 1922 and 1929: 7 At Kumoi Arsenal, 4 at Toumachi Naval Arsenal, 3 at Kousaten Navy Yard, 2 at Hoshiguma Navy Yard and one at Yamatogawa Shipyards. Finally, one last unit, Mima, was ordered abroad in Japan as all available shipyards were full with construction. Mima was laid down at Yokosuka in september 1923, but was destroyed during the Grat Kanto Earthquake and had to be laid down again, she was ultimately commissioned in 1926.
[ img ]
Six units, Meira, Kana, Rikako, Chiyuri, Yumemi and Kurumi, recieved the newer 120mm/45 Type10 guns, which, having a maximum elevation of 70° effectively served as bot surface and AA guns. Also, they sported depth charges instead of the mine-laying gear of the earlier sisters.
[ img ]
Ruukoto, the las unit to be commissioned, in 1929, recieved some more modifications, beign given a larger bridge and an expanded searchlight/rangefinder platform. RDF equipment was added at midship and the bridge rangefinder replaced with a newer model.
[ img ]
The ships formed 5 Kuchikutai units (three 4-unit and two 3-unit) up to the mid 30's..


Ships in class: (laid down-launched-commissioned - fate)

okaze 1922-1923-1923 - ?
tsumujikaze 1922-1923-1923 - ?
norio 1923-1924-1924 - ?
sachio 1923-1924 1925 - ?
kawatake 1923-1924-1924 - ?
yoshizake 1923-1924-1925 - ?
mima 1923-1926-1926 - ?
kikuri 1923-1924-1925 - ?
konngara 1924-1925-1926 - ?
genjii 1924-1925-1926 - ?
rika 1924-1925-1926 - ?
meira 1925-1926-1927 - ?
kana 1925-1926-1927 - ?
rikako 1925-1927-1927 - ?
chiyuri 1925-1927-1927 - ?
yumemi 1926-1927-1928 - ?
ruukoto 1926-1928-1929 - ?
kurumi 1926-1927-1928 - ?


part 2 following at a later, unkwnown, date.

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emperor_andreas
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: May 16th, 2015, 3:37 pm
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Awesome!

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eswube
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: May 16th, 2015, 5:05 pm
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Excellent! :D

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BB1987
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: May 18th, 2015, 2:35 pm
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S-1 Class Minesweepers:

After having converted eight old Destroyers into Minelayers, Koko no Kaigun started to look for a minesweeper class. Having no older ships to be converted dedicated units were to be built from the ground-up. Once again, in order to speed up construction as fast as possible, the new ships were based on the W-1 Class currently beign constructed in japan. The resulting ships, sporting just minor modification if compared tot he original, were just over 76m long, 8m abeam and drafted 2,3m. Armed with 2 120mm guns and a single 76mm one for AA duties they were capable of 21 knots with a 2.000 nautcial miles endurance.
While the IJN ordered four units (adding another two of a modified design in 1928) Koko's Naval Staff ordered eight of them at once, to be fielded in two four-unit flotillas: one north, and one south. All to counter the much percievd Soviet or American threat.
Named Sokaitei (minesweeper) 1 through 8, the ships had their orders split between civilian yards, construction started in 1923 for the first two units. Ultimately the last one was commissioned in 1929.
[ img ]
Starting with S-4 the ships recieved an higher fore-funnel that helped to keep the smoke away from the bridge
[ img ]
S-6, S-7 and S-8 featured a slighly different midship break, were fitted with gun shields, tripod foremast and had a full row of windows on the bridge, whose shape was also different from that of the earlier sisters. During the 30's all earlier ships got most of those features through refits.
[ img ]
WWII attrition hit the class hard. S-8 was lost from air attack during the Guadalcanal campaign, with S-6 following the next year, blown to pieces by US Heavy Cruisers in Aleutian waters.
Starting in 1944, all surviving ships had the single 76mm AA gun replaced by fice 25mm machine guns, in a twin and three single mounts. A Type13 air-search-radar was fitted, hydropohone added and depth charge numbers increased. S-4 and S-5 also landed their minesweeping equipment in order to carry more ASW weapons.
[ img ]
All surviving ships except S-2 were sunk around Koko home-waters in 1945/1946. S-2 herself served a repatriation ship after the end of the war, then she performed some mine-sweeping duties (to clear both Koko and US minefields) then she was decommissioned and scrapped in 1948.


Ships in class: (laid down-launched-commissioned - fate)

S-1 1923-1924-1924 - Sunk 1945
S-2 1923-1924-1924 - Decommissioned 1948
S-3 1924-1925-1925 - Sunk 1945
S-4 1925-1926-1927 - Sunk 1946
S-5 1926-1927-1928 - Sunk 1946
S-6 1927-1928-1928 - Sunk 1943
S-7 1928-1928-1929 - Sunk 1945
S-8 1928-1928-1929 - Sunk 1942

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Sources and documentations are the most welcome.

-Koko Kyouwakoku (Republic of Koko)
-Koko Kaiun Yuso Kaisha - KoKaYu Line (Koko AU spinoff)
-Koko - Civil Aviation


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