Destroyers (駆逐艦)

[Logi]

Ikazuchi Class (雷型) Destroyers

In a replacement bill passed 1896, the Imperial Japan Navy decided to replace it's obsolete and varied small ships with the standard Ikazuchi class destroyer. The following two years were filled with scheduling the scrapping and selling of it's small ships as well as design work on the Ikazuchi. In 1898, the Japanese Navy started laying down the destroyer hulls, producing 10 of the ships every half-year.

Numbering some 40 strong, the Ikazuchi carry out everything from mundane patrolling to escorting larger ships.

01 - Ikazuchi (雷), laid 1898
02 - Inazuma (電), laid 1898
03 - Niji (霓), laid 1898
04 - Akebono (曙), laid 1898
05 - Oboro (朧), laid 1898
06 - Sazanami (漣), laid 1898
07 - Murakumo (叢雲), laid 1898
08 - Shinonome (東雲), laid 1898
09 - Yugiri (夕霧), laid 1898
10 - Shiranui (不知火), laid 1898

11 - Kagero (陽炎), laid 1898
12 - Usugumo (薄雲), laid 1898
13 - Akatsuki (暁), laid 1898
14 - Kasumi (霞), laid 1898
15 - Shirakumo (白雲), laid 1898
16 - Asashio (朝潮), laid 1898
17 - Harusame (春雨), laid 1898
18 - Murasame (村雨), laid 1898
19 - Hayatori (速鳥), laid 1898
20 - Asagiri (朝霧), laid 1898

21 - Ariake (有明), laid 1899
22 - Fubuki (吹雪), laid 1899
23 - Arare (霰), laid 1899
24 - Kamikaze (神風), laid 1899
25 - Hatsushimo (初霜), laid 1899
26 - Yayoi (弥生), laid 1899
27 - Kisaragi (如月), laid 1899
28 - Asakaze (朝風), laid 1899
29 - Shiratsuyu (白露), laid 1899
30 - Sirayuki (白雪), laid 1899

31 - Matsukaze (松風), laid 1899
32 - Harukaze (春風), laid 1899
33 - Shigure (時雨), laid 1899
34 - Asatsuyu (朝露), laid 1899
35 - Hayate (疾風), laid 1899
36 - Oite (追手), laid 1899
37 - Yunagi (夕凪), laid 1899
38 - Yugure (夕暮), laid 1899
39 - Yudachi (夕立), laid 1899
40 - Mikazuki (三日月), laid 1899

Ikazuchi, Japan Destroyer laid down 1898 (Engine 1900)

Displacement:
   350 t light; 365 t standard; 407 t normal; 440 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (229.66 ft / 229.66 ft) x 19.03 ft x (7.25 / 7.67 ft)
   (70.00 m / 70.00 m) x 5.80 m  x (2.21 / 2.34 m)

Armament:
      2 - 2.95" / 75.0 mm 45.0 cal guns - 12.99lbs / 5.89kg shells, 300 per gun
     Breech loading guns in deck mounts, 1898 Model
     2 x Single mounts on centreline, evenly spread
      4 - 1.97" / 50.0 mm 45.0 cal guns - 3.86lbs / 1.75kg shells, 300 per gun
     Breech loading guns in casemate mounts, 1898 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 41 lbs / 19 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.20" / 5 mm         -               -
   2nd:   0.20" / 5 mm         -               -

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 7,176 ihp / 5,353 Kw = 26.00 kts
   Range 2,000nm at 10.00 kts
   Bunker at max displacement = 75 tons (100% coal)
     Caution: Delicate, lightweight machinery

Trial Speed: 30.00 kts

Complement:
   44 - 58

Cost:
   £0.049 million / $0.196 million

Distribution of weights at normal displacement:
   Armament: 7 tons, 1.8 %
      - Guns: 7 tons, 1.8 %
   Armour: 2 tons, 0.5 %
      - Armament: 2 tons, 0.5 %
   Machinery: 247 tons, 60.7 %
   Hull, fittings & equipment: 90 tons, 22.0 %
   Fuel, ammunition & stores: 57 tons, 13.9 %
   Miscellaneous weights: 4 tons, 1.0 %
      - On freeboard deck: 4 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     74 lbs / 33 Kg = 5.7 x 3.0 " / 75 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.36
   Metacentric height 0.7 ft / 0.2 m
   Roll period: 9.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.15
   Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
   Hull has raised forecastle,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.450 / 0.460
   Length to Beam Ratio: 12.07 : 1
   'Natural speed' for length: 15.15 kts
   Power going to wave formation at top speed: 63 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  13.78 ft / 4.20 m,  13.45 ft / 4.10 m
      - Forward deck:   30.00 %,  6.89 ft / 2.10 m,  6.89 ft / 2.10 m
      - Aft deck:   30.00 %,  6.89 ft / 2.10 m,  6.89 ft / 2.10 m
      - Quarter deck:   20.00 %,  6.89 ft / 2.10 m,  6.89 ft / 2.10 m
      - Average freeboard:      8.23 ft / 2.51 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 202.1 %
      - Above water (accommodation/working, high = better): 83.1 %
   Waterplane Area: 2,787 Square feet or 259 Square metres
   Displacement factor (Displacement / loading): 18 %
   Structure weight / hull surface area: 17 lbs/sq ft or 83 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.18
      - Overall: 0.54
   Extremely poor machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

2x18" single TTs with single reload

[Logi]

Nowaki Class (野分型) Destroyers

After the production of the Ikazuchi-class, limited production of a new fleet destroyer was authorized. Passed in early Spring of 1900, the Imperial Japanese Navy was to receive four such boats per year over the next five years.

After several design proposals, K500B (Destroyer 500 tons) was selected and given the name Nowaki.

「雷型」の生産の後、新しいの駆逐艦の限定生産を承認された。１９００の春先に始まる、海軍は、今後5年間で、年間4隻を受ける。 いくつかのデザイン提案の後、ｋ５００ｂ（駆逐艦、５００トン）を選択し、名前「野分」与えられました。


01 - Nowaki (型), laid 1900
02 - Ushio (潮), laid 1900
03 - Nenohi (子日), laid 1900
04 - Hibiki (響), laid 1900
05 - Shirotae (白妙), laid 1901
06 - Hatsuharu (初春), laid 1901
07 - Wakaba (若葉), laid 1901
08 - Hatsuyuki (初雪), laid 1901
09 - Uzuki (卯月), laid 1902
10 - Minatsuki (水無月), laid 1902

11 - Nagatsuki (長月), laid 1902
12 - Kikutsuki (菊月), laid 1902
13 - Uranami (浦波), laid 1903
14 - Isonami (磯波), laid 1903
15 - Ayanami (綾波), laid 1904
16 - Umikaze (海風), laid 1904

Nowaki, Japan Destroyer laid down 1900

Displacement:
   500 t light; 517 t standard; 618 t normal; 699 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (229.66 ft / 229.66 ft) x 17.72 ft x (9.51 / 10.50 ft)
   (70.00 m / 70.00 m) x 5.40 m  x (2.90 / 3.20 m)

Armament:
      3 - 2.95" / 75.0 mm 45.0 cal guns - 12.99lbs / 5.89kg shells, 200 per gun
     Breech loading guns in deck mounts, 1898 Model
     3 x Single mounts on centreline, evenly spread
      Weight of broadside 39 lbs / 18 kg

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 9,821 ihp / 7,327 Kw = 26.00 kts
   Range 4,000nm at 10.00 kts
   Bunker at max displacement = 182 tons (90% coal)
     Caution: Delicate, lightweight machinery

Trial Speed: 29.00 kts

Complement:
   61 - 80

Cost:
   £0.072 million / $0.287 million

Distribution of weights at normal displacement:
   Armament: 7 tons, 1.1 %
      - Guns: 7 tons, 1.1 %
   Machinery: 374 tons, 60.4 %
   Hull, fittings & equipment: 114 tons, 18.5 %
   Fuel, ammunition & stores: 118 tons, 19.0 %
   Miscellaneous weights: 6 tons, 1.0 %
      - On freeboard deck: 6 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     109 lbs / 49 Kg = 8.5 x 3.0 " / 75 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.31
   Metacentric height 0.6 ft / 0.2 m
   Roll period: 9.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.20
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.559 / 0.572
   Length to Beam Ratio: 12.96 : 1
   'Natural speed' for length: 15.15 kts
   Power going to wave formation at top speed: 67 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   15.00 %,  9.19 ft / 2.80 m,  8.86 ft / 2.70 m
      - Forward deck:   35.00 %,  8.86 ft / 2.70 m,  8.86 ft / 2.70 m
      - Aft deck:   35.00 %,  8.86 ft / 2.70 m,  8.86 ft / 2.70 m
      - Quarter deck:   15.00 %,  8.86 ft / 2.70 m,  8.86 ft / 2.70 m
      - Average freeboard:      8.88 ft / 2.71 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 198.4 %
      - Above water (accommodation/working, high = better): 79.2 %
   Waterplane Area: 2,863 Square feet or 266 Square metres
   Displacement factor (Displacement / loading): 20 %
   Structure weight / hull surface area: 18 lbs/sq ft or 86 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.60
      - Overall: 0.56
   Cramped machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

3 x 1 45cm TT rotating centerline, with one reload

[Logi]

Yamakaze Class (山風型) Destroyers

After a long and successful run of the Nowaki class fleet destroyers, the Japanese government decided to terminate production 4 units early and switch to an alternative design. The designs which had been in the works since late 1903 were finalized mid 1904. These destroyers would exchange endurance and slight amounts of speed for much heavier batteries.

The Admiralty had concluded through an extensive set of wargames that torpedoes were not as useful as previously thought on a small and fragile vehicle like the destroyer. As a result, the destroyer of the future would carry very few torpedoes and instead have very heavy main batteries. These batteries would allow the destroyer to inflict greater damage on protected and unprotected cruisers as well as enemy destroyers. Although the Admiralty was not fully satisfied with the resulting Yamakaze class design, it authorized the construction as an interim before design work and details could be completed on a larger and more capable fleet destroyer.

01 - Yamakaze (山風), laid 1904
02 - Urakaze (浦風), laid 1904
03 - Kawakaze (江風), laid 1904
04 - Sakura (櫻), laid 1904
05 - Tachibana (橘), laid 1904

Yamakaze, Japanese Fleet Destroyer laid down 1904 (Engine 1905)

Displacement:
   500 t light; 527 t standard; 613 t normal; 682 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (229.66 ft / 229.66 ft) x 21.00 ft x (8.86 / 9.60 ft)
   (70.00 m / 70.00 m) x 6.40 m  x (2.70 / 2.93 m)

Armament:
      4 - 4.72" / 120 mm 45.0 cal guns - 44.97lbs / 20.40kg shells, 150 per gun
     Quick firing guns in deck mounts, 1904 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      Weight of broadside 180 lbs / 82 kg

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 9,500 shp / 7,087 Kw = 25.84 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 154 tons (90% coal)

Trial Speed: 28.50 kts

Complement:
   61 - 80

Cost:
   £0.073 million / $0.292 million

Distribution of weights at normal displacement:
   Armament: 37 tons, 6.1 %
      - Guns: 37 tons, 6.1 %
   Machinery: 324 tons, 52.8 %
   Hull, fittings & equipment: 125 tons, 20.4 %
   Fuel, ammunition & stores: 113 tons, 18.4 %
   Miscellaneous weights: 14 tons, 2.3 %
      - On freeboard deck: 14 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     131 lbs / 60 Kg = 2.5 x 4.7 " / 120 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.18
   Metacentric height 0.7 ft / 0.2 m
   Roll period: 10.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.90
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.502 / 0.515
   Length to Beam Ratio: 10.94 : 1
   'Natural speed' for length: 15.15 kts
   Power going to wave formation at top speed: 67 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   15.00 %,  14.11 ft / 4.30 m,  13.78 ft / 4.20 m
      - Forward deck:   26.00 %,  13.78 ft / 4.20 m,  13.78 ft / 4.20 m
      - Aft deck:   47.00 %,  6.89 ft / 2.10 m,  6.89 ft / 2.10 m
      - Quarter deck:   12.00 %,  6.89 ft / 2.10 m,  6.89 ft / 2.10 m
      - Average freeboard:      9.73 ft / 2.97 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 186.8 %
      - Above water (accommodation/working, high = better): 93.9 %
   Waterplane Area: 3,220 Square feet or 299 Square metres
   Displacement factor (Displacement / loading): 37 %
   Structure weight / hull surface area: 22 lbs/sq ft or 107 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.93
      - Overall: 0.57
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Misc Weight: 14t
10t - Short-Range Wireless
4t - 2x1 46cm rotating centerline TTs with 1 reload each