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Krakatoa
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: June 19th, 2015, 6:31 pm
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Nice work BB1987, that Fleet Review must be difficuilt to keep up to date. You are not allowed to go over your treaty limits or that page is going to be really huge and the maintenance job from hell.


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BB1987
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: June 20th, 2015, 10:06 am
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Krakatoa wrote:
Nice work BB1987, that Fleet Review must be difficuilt to keep up to date. You are not allowed to go over your treaty limits or that page is going to be really huge and the maintenance job from hell.
I have a 64kexcel spreadshhet on my pc with the entire Koko's fleet up to 2014/2015, So I took advantage of that and I've written up the fleet reviews up to 1941. it surely makes the work more manageable :lol:

now, ships time. This is technicaly the second part of Sato's History, but I've copypasted the first part in it too, so there is a single comprehensive entry for her entire career. (might do the same with other ships with split history).


Sato Class Detroyer:

Originally laid down as the unnamed Kuchikukan 37, Sato was to be the lead unit of a 26-unit strong class of Destroyers. Itself an updated and modified version of the Kuchikukan 27 class, Sato featured the same armament of four 120mm guns and three twin 533mm torpedo tubes but had the hull stretched by 2,1m for an overall lenght of 106,8 and a standard displacement of 1.353Tons. This was meant to allow for extra fuel bunkerage to be carried in order to gain more range over the Kuckicukan 14 class which lacked in this field. The center funnel was also slightly enlarged to allow for a better exhaust from the boiler rooms.
Sato, which being so named during construction became the first Koko no Kaigun destroyer to recieve an actual name, was laid down at Toumachi Naval Arsenal in 1920 and Launched on January 1st 1922. Already almost complete, she was commissioned in record-breaking time just over a month later on february 4th and assigned to Kuchikutai 4 (Destroyer division) even though she was still running her trials.
Her top speed was 34,2knots, some 0,7 less than the Kuchikukan 27 because of the increase of displacement, but range had risen up from 2.600 to 2.800 nautical miles.
When the Washington Naval Treaty was signed, four more units, Destroyers 38 through 41 (still unnamed) were under construction at Hoshiguma Navy Yard (number 39,40), Kousaten navy Yard (number 41) and Kumoi Arsenal (number 38). All the other units up to Destroyer 62 had already been ordered and allocated to their respective building yard.
[ img ]
Still, a number of coupled factors eventually led to the premature demise of the Sato Class: Firstly, the Washington Naval Treaty itself almost grinded to an halt Koko's capital ship contruction plan, reducing the immediate need of new Destroyers that had to be built. Secondly, Sato sea trials showed that while the range had improved over the previous class it was still lacking when compared to other new classes of Destroyers, and the drop in top speed to just over 34knots when other Navies were developing 36 and 37knots units was deemed unacceptable. Finally, Kuckikukans 27 were already themselves a 7,8m stretch over the Japanese Isokazes on which they were based, Sato then added another 2 meters to that, bringing the total stretch to nearly 10 meters without increasing either beam or draft. This resulted in an extremely long and thin hull that was deemed structuraly unsound for prolonged blue-water operations in rough seas.
So, within two months of the Washington Naval Treaty ratification, the whole Sato Class plan was canceled and shelved: The four units under construction were broken up in the yards, the other 21 units already allocated were reordered on a smaller design that later became the Shion Class and as first batch of the larger Okaze Class. Sato, already in service, was the only ship of her class to survive the axe, and served a long, uneventful second-line career until her first refit.
In 1938, when Battleship Yagumo re-entered active service after her main refit, Sato was withdrawn from active service and refitted. Beign the oldest and most outdated destroyer in Koko no Kaigun's inventory, Sato was modified in order to serve as a training ship: the forward torpedo tubes were removed and replaced with a deckhouse housing the RDF room and cadets space, the guns were given shields and the bridge recieved windows. The 60cm searchlight above the bridge was replaced with an 1,5m rangefinder, with a newer 90cm one installed at midship. The 6,5mm machine guns were removed and replaced with a twin 25mm mount. Two twin 13mm machine guns were added near the fore-funnel and two depth charge throwers were fitted at the stern.
[ img ]
Sato served as a training vessel until early 1945, when mounting losses necessitated her return to frontline service. During her second refit one of the 120mm guns was removed, with anti-aircraft armament increased to twelve 25mm guns (two triples, two twin and two singles) and four 13mm ones. The depth charge complement was increased to two rails and four racks. A trype13 air-searh radar was added to the foremast.
[ img ]
Even with her newly made modifications Sato was still left to operate near home waters, mainly because of her lack of range. When Koko uprising started late that year, Sato was docked at Teshigawa, and remained there until the end of the war, thus escaping damage from sabotage and allied bombings. After the war she briefly operated to repatriate troops, but her age and insufficent range led Sato do be decommissioned in December 1946 and later broken up.


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

Sato 1920-1922-1922 - Decommissioned 1946
Destroyer 38 1921-/-/ - Canceled and scrapped 1922
Destroyer 39 1921-/-/ - Canceled and scrapped 1922
Destroyer 40 1921-/-/ - Canceled and scrapped 1922
Destroyer 41 1921-/-/ - Canceled and scrapped 1922
Destroyers 42 through 62 /-/-/ - Canceled and reordered as Shion and Okaze Class units in 1922

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-Koko - Civil Aviation


Last edited by BB1987 on June 29th, 2016, 10:28 pm, edited 2 times in total.

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emperor_andreas
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: June 20th, 2015, 1:24 pm
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Nice!

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BB1987
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: June 23rd, 2015, 8:17 pm
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Link to part 1

Yagumo Class Battleship (part 2, 1930-1940/41):

Under the provisions set by the newly ratified London Naval Treaty, Yagumo's main refit was canceled. The ship was Drydocked at Toumachi Naval arsenal in January 1931 to be converted into a training ship, works going on until mid 1932. During conversion all her oil-fired boilers were removed, dropping engine power to 20.485shp (down from 63.581) and top speed to 18,5 knots (pre-refit was 25knots), the fore-funnel was thus removed. The forward superfiring and the midship 356mm (14-inch) turrets were removed, as they were ten of the sixteen 140mm (5.5-inch) casemate guns, most of the 76mm (3-inch) AA guns were removed as well. The main side armor belt was also removed, Two of the 76mm guns were moved on top the former midship 356mm gun barbette, and three twin mounts for the newer 127mm (5-inch) guns were added, two on the sides of the bridge and one on top of the former forward superfiring turret. All modifications decreased the ship standard displacement by 5.922T to 19.222T, decreasing draft from 9,1 to 7,2m. Other works consisted in adding covered spaces for cadets at midship and fitting training guns and new platforms and improved rangefinders for fire-control practices.
[ img ]
Shortly after her sister left the yards, Inaba was docked at Toumachi to uderwent her main modernization, the same one Yagumo would have underwent if not for the LNT; Inaba's stern was lenghtned by 4,2m and anti-torpedo bulges were added bringing the full beam to 31,4m, with both the fore and aft superstructure completely reconstructed in order to house newer and more advanced directors and fire-control equipment, all topped by an 8-m rangefinder fitted on the forward superstructure. The two forwardmost 140mm guns and all 76mm ones were removed, the latter replaced by eight 127mm AA ones, arranged in four twin mounts, the remaining casemate mounts had their maximum elevation increased to 30°. The main guns maximum elevation was increased to 43°, sixteen 13.2mm machine gun mounts in four quadruple mounts were fitted. Armor belt was removed and replaced with a thicker 356mm (14-inch) one, tapering to 127mm fore and aft of the main gun barbettes. Because the increase of displacement would have increased draft by 0,5m to 10,18m, thus putting below the waterline a sizable portion of the main belt, the upper armor strakes were also increased in thickness to 203mm (8-inch). Deck armor was also increased to 140mm, with 55mm plates added over the quarterdeck to protect the steeriing gear. Another 88mm plate was added inside the bulges to augment the original 25mm ones in anti-torpedo protection. Extra bunkerage inside the blges incresed range to 9.000 nautical-miles at 16knots. Displacement increased to 31.648T standard and 36.567T at full load, but the engines were completely refurbished, with all te coal and mixe-dfiring boilers replaced by an all-oil-fired system, powering the turbines to a maximum of 115.890shp, enough to propel the ship to 28knots, this allowed for the removal of the fore-funnel. A catapult was fitted at the stern, and a collapsible crane added to operate two Nakajima E4N reconnaissance seaplanes, lattice platform housing 110cm searchlights were erected around the funnel. Complement rose to 1.262 officers and men.
Once recommissioned, Inaba joined Kii and Owari to form Sentai 1, serving in that role until 1938, with the rebuilt Amagi replacing Kii in 1937.
[ img ]
In early 1936, under the second rearmement bill passed by Morimoto's government, a refit to bring Yagumo back to active service was approved. During works, at Hoshiguma Navy Yard, the main gun turrets and casemate mounts removed during the trining ship conversion -but kept in storage for this very same reason- were fitted back in place, with the exception of the two formemost casemate mounts, which were plated over. Overall, Yagumo underwent roughly the same modifications of her sister, athough with some differencies. The mainmast was of a different design, and most of the rangefinders were of a more advanced type. The searchlight platform around the funnel was also arranged differently in order to fit a machine gun director in a dedicated platform. Sixteen 25mm machine guns in eight twin mounts were fitted as light AA guns instead of the quad 13.2mm ones of Inaba. Overall, the forward superstructure had larger greenhouses, enclosed spaces, a different signaling platform and higher yardarms. More strikingly, the top of the pagoda tower was lower by a deck, with an open anti-aircraft command post fitted on top along a more advanced main gun director. Aircraft comlement was comosed of two Nakajima E8N seaplanes. Lastly, the second starboard anchor, which had been left in place on Inaba, was removed.
[ img ]
Yagumo was recommissioned in early 1938 as the flagship of Sentai 2, joined by her sister Inaba for the fist time in almost eight years. A small refit to upgrade Inaba with the same fire-control equipment of Yagumo, removal of the second starboard anchor and fitting of the anti-air command post was planned for 1941. Yet, by that year Koko shipyards all had their priorities focused on the Aricraft carriers, the Yashima class Battleship and the conversion of the Same-clkass submarine tenders into Light Carriers, other than the much needed Destroyer and Submarine construction. Thus, Inaba entered the pacific war still in her 1935 fit, effectively beign the most oudated Battleship in Koko no Kaigun inventory. Just the first indication of her unlucky wartime service...

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


Last edited by BB1987 on June 24th, 2015, 12:27 pm, edited 1 time in total.

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JSB
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: June 23rd, 2015, 8:51 pm
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RE the LNT training vessel,
Section V,b),(1) Removal of main armament guns, revolving parts of all barbettes and turrets; machinery for operating turrets; but three turrets with their armament may be retained in each ship;
So I think you need to take one more off to comply (in OTL Iron Duke keept A,Q,X probably for weight balance reasons)
(and you can keep some of the other guns to train with)

Apart from that 3 very nice ships 8-)


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BB1987
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: June 23rd, 2015, 10:12 pm
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JSB wrote:
RE the LNT training vessel,
Section V,b),(1) Removal of main armament guns, revolving parts of all barbettes and turrets; machinery for operating turrets; but three turrets with their armament may be retained in each ship;
So I think you need to take one more off to comply (in OTL Iron Duke keept A,Q,X probably for weight balance reasons)
(and you can keep some of the other guns to train with)

Apart from that 3 very nice ships 8-)
:facepalm:
And I was totally sure to have checked everything I needed to in order to avoid stupid errors like that.
Well, consider I'll amend this tomorrow. I might kill the forward superfiring gun, I might make the bow lighter a bit, but I'll aslo remove the two highest turrets, like on the Duke. I've deleted theentire casemate battery to roughly follow IJN hiei.

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


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emperor_andreas
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: June 24th, 2015, 1:17 am
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VERY nice work!

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BB1987
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: June 24th, 2015, 12:28 pm
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Ok, possibly amended Yagumo's glitches about the training ship conversion.

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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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Krakatoa
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: June 24th, 2015, 1:20 pm
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Looks good BB1987, nice blend of styles.


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Hood
Post subject: Re: Koko Kyouwakoku (Republic of Koko)Posted: June 25th, 2015, 7:50 am
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Fantastic work.

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