UNK Ships and Studies for 1916 onward

[Carthaginian]

The Royal Navy has long used obsolescent ships as training facilities for its officer academies. In the years before iron hulled ships, these vessels might have been old and unsuitable for combat, but they were otherwise identical to ships in service. However, as time has passed, the old ships used as academies are falling farther and farther behind the times. The most recent vessels relegated to that duty- the 1884 vintage Dauntless class- are now so obsolescent that they cannot be used accurately for teaching purposes.

In order to preserve the tradition of training officers aboard ship, the Royal Navy in considering the construction of a class specifically for training cadets. The vessels are (in spite of their armament) hardly warships, they are mobile classrooms which simply happen to carry a gunnery range with them. The ship would carry a full library and four 25 seat classrooms in which midshipmen continue their normal classes at sea. The students' accommodations will be no better than what ratings would endure at sea (the teachers and command staff have the officers' staterooms), enabling them to taste the situation of the men they will lead.

Should the design be approved, they will be laid down in late 1916.
Two ships will be built for each academy- Liverpool (Oxford and Cambridge) and Boston (Harvard and William & Mary.)

Oxford, United Norman Kingdom Training Cruiser laid down 1916

Displacement:
   1,500 t light; 1,561 t standard; 1,775 t normal; 1,945 t full load

Dimensions: Length overall / water x beam x draught
   330.56 ft / 325.00 ft x 35.00 ft x 10.00 ft (normal load)
   100.75 m / 99.06 m x 10.67 m  x 3.05 m

Armament:
      3 - 5.50" / 140 mm guns in single mounts, 75.00lbs / 34.02kg shells, 1916 Model
     Quick firing guns in deck mounts with hoists
     on centreline, evenly spread
     Aft Main mounts separated by engine room
      4 - 1.00" / 25.4 mm guns (2x2 guns), 0.50lbs / 0.23kg shells, 1916 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
      2 - 1.00" / 25.4 mm guns (1x2 guns), 0.50lbs / 0.23kg shells, 1916 Model
     Anti-aircraft guns in deck mount
     on centreline forward, all raised guns - superfiring
   Weight of broadside 228 lbs / 103 kg
   Shells per gun, main battery: 200

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   3.00" / 76 mm   1.00" / 25 mm      3.00" / 76 mm

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 13,998 shp / 10,443 Kw = 24.90 kts
   Range 6,000nm at 12.00 kts
   Bunker at max displacement = 384 tons

Complement:
   136 - 177

Cost:
   £0.249 million / $0.995 million

Distribution of weights at normal displacement:
   Armament: 32 tons, 1.8 %
   Armour: 23 tons, 1.3 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 23 tons, 1.3 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 522 tons, 29.4 %
   Hull, fittings & equipment: 809 tons, 45.6 %
   Fuel, ammunition & stores: 274 tons, 15.5 %
   Miscellaneous weights: 115 tons, 6.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,128 lbs / 965 Kg = 25.6 x 5.5 " / 140 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.16
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 12.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.44
   Seaboat quality  (Average = 1.00): 1.53

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.546
   Length to Beam Ratio: 9.29 : 1
   'Natural speed' for length: 18.03 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 46
   Bow angle (Positive = bow angles forward): 15.53 degrees
   Stern overhang: -5.00 ft / -1.52 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      20.00 ft / 6.10 m
      - Forecastle (20 %):   18.00 ft / 5.49 m
      - Mid (65 %):      18.00 ft / 5.49 m (10.00 ft / 3.05 m aft of break)
      - Quarterdeck (20 %):   10.00 ft / 3.05 m
      - Stern:      11.00 ft / 3.35 m
      - Average freeboard:   15.46 ft / 4.71 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 116.5 %
      - Above water (accommodation/working, high = better): 177.2 %
   Waterplane Area: 7,909 Square feet or 735 Square metres
   Displacement factor (Displacement / loading): 124 %
   Structure weight / hull surface area: 55 lbs/sq ft or 268 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.87
      - Longitudinal: 3.18
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Blooded]

I need to get some training vessels myself, seems like a good unit at a good price.


A little off topic, but why did so many navies keep old hulks around as 'accommedation' ships and the like? Did they not have enough boarding and storage available on land in the ports?

It seems like a lot of steel to leave laying about. For instance Japan still had half a dozen OLD cruiser hulks around by the end of WW2, yet they were short on metal(scrap drives and such) from the 1920s on.

[Guinness]

Accommodation or receiving ships were still cheaper than acquiring land to build shore side housing in many cases. There was also the feeling then that sailors should sleep aboard ships ostensibly for morale purposes, but also because they tended to get in less trouble that way.

[Carthaginian]

*NOTE: all these ships have a 'projected' laydown of 1916, since that is the engine tech year; they would not actually be laid down until the Capital Ship Diesel tech was mature, and the laydown year altered to fit that.*

The Underhanded class was proposed to serve as a large minelayer. Taking advantage of recent developments in diesel propulsion, she uses diesel/electric drive. The smaller size of the power units and increased redundancy means that Underhanded is more survivable than a similar-sized ship with a pair of oil-fired boilers. Also, the work needed to replace a diesel engine if it becomes damaged can be accomplished in a week, whereas replacing a boiler might have taken a fortnight or even a month. Additionally, the small space required for the diesel engines meant that the mine load could be greatly expanded- 215 mines are carried below decks. The long, covered working deck was a feature that the original designers regretted, but felt was necessary due to the North Sea's less-than-accommodating weather. Once the proposal reached the Admiralty, however, several different factions looked at the hull and giddily ordered copies of the plans- which were promptly folded, spindled and mutilated into something totally other.

The 3rd Sea Lord Lionel Halsey( who recently finished a tour of duty in Sierra Leone before receiving appointment to the post) ordered a revision of the plans that would turn the vessel into a jack-of-all-trades colonial avisio- this design carries 100 mines, command and control facilities, a platoon of 25 marines and four metal-hulled 5-ton motor launches armed with two .30 calibre machine guns. This, he feels, would make a suitable station ship for the long-neglected colonial base.

Admiral Godfrey Paine, over the Royal Naval Air Force, also ordered a revision of the plans to suit his needs. The mine-storage facility was removed, and additional quarters, stores and shops for supporting a pair of aircraft were substituted, along with another pair of diesel engines, bringing the ship's top speed up to 24 knots, allowing her to work with the battle fleet (nothing, however, was done to extend her range). Finally, the working deck was altered to allow storage space for a pair of R.E.7 scout/bombers and the necessary equipment to recover them.

All the ships are visually similar, with only the aft superstructure differing to any great degree. Also, the Vigilant's exhaust stack is an additional 4' wider to accommodate the intakes and exhausts for the additional engines.

Underhanded, United Norman Kingdom Minelayer laid down 1916

Displacement:
   2,100 t light; 2,184 t standard; 2,355 t normal; 2,492 t full load

Dimensions: Length overall / water x beam x draught
   355.00 ft / 350.00 ft x 40.00 ft x 12.00 ft (normal load)
   108.20 m / 106.68 m x 12.19 m  x 3.66 m

Armament:
      4 - 5.50" / 140 mm guns (2x2 guns), 75.00lbs / 34.02kg shells, 1916 Model
     Breech loading guns in deck mounts with hoists
     on centreline, evenly spread
      4 - 3.00" / 76.2 mm guns in single mounts, 12.00lbs / 5.44kg shells, 1916 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, 2 raised mounts
      8 - 1.00" / 25.4 mm guns (4x2 guns), 0.50lbs / 0.23kg shells, 1916 Model
     Anti-aircraft guns in deck mounts
     on centreline, evenly spread, all raised mounts
   Weight of broadside 352 lbs / 160 kg
   Shells per gun, main battery: 180

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.00" / 51 mm   270.00 ft / 82.30 m   16.00 ft / 4.88 m
   Ends:   Unarmoured
     Main Belt covers 119 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.00" / 51 mm   1.00" / 25 mm      3.00" / 76 mm

   - Armour deck: 1.00" / 25 mm, Conning tower: 3.00" / 76 mm

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 8,000 shp / 5,968 Kw = 20.97 kts
   Range 4,000nm at 12.00 kts
   Bunker at max displacement = 308 tons

Complement:
   168 - 219

Cost:
   £0.256 million / $1.023 million

Distribution of weights at normal displacement:
   Armament: 49 tons, 2.1 %
   Armour: 557 tons, 23.7 %
      - Belts: 353 tons, 15.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 22 tons, 0.9 %
      - Armour Deck: 171 tons, 7.3 %
      - Conning Tower: 11 tons, 0.5 %
   Machinery: 298 tons, 12.7 %
   Hull, fittings & equipment: 880 tons, 37.4 %
   Fuel, ammunition & stores: 255 tons, 10.8 %
   Miscellaneous weights: 315 tons, 13.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4,148 lbs / 1,881 Kg = 49.9 x 5.5 " / 140 mm shells or 1.3 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 1.6 ft / 0.5 m
   Roll period: 13.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.31
   Seaboat quality  (Average = 1.00): 1.58

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.491
   Length to Beam Ratio: 8.75 : 1
   'Natural speed' for length: 18.71 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 45
   Bow angle (Positive = bow angles forward): 14.75 degrees
   Stern overhang: -3.00 ft / -0.91 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      19.00 ft / 5.79 m
      - Forecastle (15 %):   16.00 ft / 4.88 m
      - Mid (55 %):      16.00 ft / 4.88 m (8.00 ft / 2.44 m aft of break)
      - Quarterdeck (10 %):   8.50 ft / 2.59 m
      - Stern:      9.00 ft / 2.74 m
      - Average freeboard:   12.74 ft / 3.88 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 72.6 %
      - Above water (accommodation/working, high = better): 129.9 %
   Waterplane Area: 9,249 Square feet or 859 Square metres
   Displacement factor (Displacement / loading): 127 %
   Structure weight / hull surface area: 61 lbs/sq ft or 299 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.53
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Minelayer version miscellaneous weights:
100 tons - Fire Control
215 tons - 215 Mines

Avisio version miscellaneous weights:
100 tons - Fire Control
  50 tons - 25 Marines
  20 tons - 4 Small Boats
  20 tons - Command Facilities
  25 tons - Long-range Marconi
100 tons - 100 Mines

Vigilant (Underhanded hull), United Norman Kingdom Floatplane Tender laid down 1916

Displacement:
   2,100 t light; 2,184 t standard; 2,355 t normal; 2,492 t full load

Dimensions: Length overall / water x beam x draught
   355.00 ft / 350.00 ft x 40.00 ft x 12.00 ft (normal load)
   108.20 m / 106.68 m x 12.19 m  x 3.66 m

Armament:
      4 - 5.50" / 140 mm guns (2x2 guns), 75.00lbs / 34.02kg shells, 1916 Model
     Breech loading guns in deck mounts with hoists
     on centreline, evenly spread
      4 - 3.00" / 76.2 mm guns in single mounts, 12.00lbs / 5.44kg shells, 1916 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, 2 raised mounts
      8 - 1.00" / 25.4 mm guns (4x2 guns), 0.50lbs / 0.23kg shells, 1916 Model
     Anti-aircraft guns in deck mounts
     on centreline, evenly spread, all raised mounts
   Weight of broadside 352 lbs / 160 kg
   Shells per gun, main battery: 180

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.00" / 51 mm   270.00 ft / 82.30 m   16.00 ft / 4.88 m
   Ends:   Unarmoured
     Main Belt covers 119 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.00" / 51 mm   1.00" / 25 mm      3.00" / 76 mm

   - Armour deck: 1.00" / 25 mm, Conning tower: 3.00" / 76 mm

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 11,997 shp / 8,950 Kw = 23.25 kts
   Range 4,000nm at 12.00 kts
   Bunker at max displacement = 308 tons

Complement:
   168 - 219

Cost:
   £0.290 million / $1.159 million

Distribution of weights at normal displacement:
   Armament: 49 tons, 2.1 %
   Armour: 557 tons, 23.7 %
      - Belts: 353 tons, 15.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 22 tons, 0.9 %
      - Armour Deck: 171 tons, 7.3 %
      - Conning Tower: 11 tons, 0.5 %
   Machinery: 447 tons, 19.0 %
   Hull, fittings & equipment: 896 tons, 38.1 %
   Fuel, ammunition & stores: 255 tons, 10.8 %
   Miscellaneous weights: 150 tons, 6.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,556 lbs / 1,613 Kg = 42.8 x 5.5 " / 140 mm shells or 1.0 torpedoes
   Stability (Unstable if below 1.00): 1.16
   Metacentric height 1.7 ft / 0.5 m
   Roll period: 13.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.31
   Seaboat quality  (Average = 1.00): 1.27

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.491
   Length to Beam Ratio: 8.75 : 1
   'Natural speed' for length: 18.71 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   Bow angle (Positive = bow angles forward): 14.75 degrees
   Stern overhang: -3.00 ft / -0.91 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      19.00 ft / 5.79 m
      - Forecastle (15 %):   16.00 ft / 4.88 m
      - Mid (55 %):      16.00 ft / 4.88 m (8.00 ft / 2.44 m aft of break)
      - Quarterdeck (10 %):   8.50 ft / 2.59 m
      - Stern:      9.00 ft / 2.74 m
      - Average freeboard:   12.74 ft / 3.88 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 85.3 %
      - Above water (accommodation/working, high = better): 129.9 %
   Waterplane Area: 9,249 Square feet or 859 Square metres
   Displacement factor (Displacement / loading): 118 %
   Structure weight / hull surface area: 62 lbs/sq ft or 305 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.55
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Miscellaneous weight breakdown:
100 tons - Fire Control
  50 tons - 2 R.E.7 scout/bombers floatplanes

[The Rock Doctor]

Nice backstory, and I'll look forward to viewing the pictures when I'm...not in a place that blocks pictures.

The designs look good at first glance, though I'd propose providing the aviso version with a long-range wireless and ~25 t command facilities in place of some of the mines.  Assuming it's to be the flagship of the colonial station, that is. 

[Carthaginian]

Nice backstory, and I'll look forward to viewing the pictures when I'm...not in a place that blocks pictures.

The designs look good at first glance, though I'd propose providing the aviso version with a long-range wireless and ~25 t command facilities in place of some of the mines.  Assuming it's to be the flagship of the colonial station, that is. 

Good advice... she has it to spare. I'll work that in.

The pictures aren't all that impressive (or finished) but they give the general idea.

[maddox]

Pity they need a size 1 slip/drydock.

But these vessels are the Big Brothers of the old Chardon class ships.

[Carthaginian]

Finding themselves in desperate need for a destroyer to replace their ancient D-class vessels, the Admiralty issued requirements for a new class of torpedo boat destroyer. As the recent B-class was almost exclusively intended for short-range work in the North Sea, the primary requirement for the newly proposed C-class was long range. A minimum of 'New York to Portsmouth at cruise speed' was established, and the draft proposal from Laird and Sons Shipbuilding in Birkenhead far exceeded all expectations.
The ship's range (almost 4000 n. mi. @ 14 knots) is but one of her favorable attributes. She also mounts three twin 4"/L45 QF gun mounts, which bost large gun shields to protect against the stormy North Atlantic weather. Additionally, she carries two triple 20" torpedo mounts (though they are an older model torpedo) which provide a formidable striking power against capital ships. Her top speed of 31 knots (projected) is well in line with other vessels being christened recently.
The Admiralty has currently contracted with Laird and Sons to begin construction of no less than 8 units in the second half of 1916, with the possibility of further orders to follow in 1917.


C Class, United Norman Kingdom Fleet Destroyer laid down 1916

Displacement:
   1,000 t light; 1,045 t standard; 1,200 t normal; 1,324 t full load

Dimensions: Length overall / water x beam x draught
   360.00 ft / 350.00 ft x 30.00 ft x 10.00 ft (normal load)
   109.73 m / 106.68 m x 9.14 m  x 3.05 m

Armament:
      6 - 4.00" / 102 mm guns (3x2 guns), 30.00lbs / 13.61kg shells, 1916 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, majority aft, 1 raised mount aft - superfiring
      6 - 1.00" / 25.4 mm guns (3x2 guns), 0.50lbs / 0.23kg shells, 1916 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 183 lbs / 83 kg
   Shells per gun, main battery: 200
   6 - 20.0" / 508 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm   0.50" / 13 mm      2.00" / 51 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 21,000 shp / 15,666 Kw = 30.24 kts
   Range 3,900nm at 14.00 kts
   Bunker at max displacement = 280 tons

Complement:
   101 - 132

Cost:
   £0.223 million / $0.894 million

Distribution of weights at normal displacement:
   Armament: 24 tons, 2.0 %
   Armour: 11 tons, 1.0 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 11 tons, 1.0 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 579 tons, 48.3 %
   Hull, fittings & equipment: 373 tons, 31.1 %
   Fuel, ammunition & stores: 200 tons, 16.7 %
   Miscellaneous weights: 12 tons, 1.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     383 lbs / 174 Kg = 12.0 x 4.0 " / 102 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.49
   Metacentric height 1.6 ft / 0.5 m
   Roll period: 9.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.35
   Seaboat quality  (Average = 1.00): 1.30

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.400
   Length to Beam Ratio: 11.67 : 1
   'Natural speed' for length: 18.71 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 39
   Bow angle (Positive = bow angles forward): 25.46 degrees
   Stern overhang: -5.00 ft / -1.52 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      21.00 ft / 6.40 m
      - Forecastle (15 %):   18.50 ft / 5.64 m
      - Mid (30 %):      18.00 ft / 5.49 m (10.00 ft / 3.05 m aft of break)
      - Quarterdeck (15 %):   10.50 ft / 3.20 m
      - Stern:      11.00 ft / 3.35 m
      - Average freeboard:   12.91 ft / 3.94 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 172.8 %
      - Above water (accommodation/working, high = better): 93.8 %
   Waterplane Area: 6,463 Square feet or 600 Square metres
   Displacement factor (Displacement / loading): 67 %
   Structure weight / hull surface area: 30 lbs/sq ft or 144 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.37
      - Overall: 0.55
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is adequate
   Good seaboat, rides out heavy weather easily

Trial Speed - 31.15 knots

Miscellaneous Weight Breakdown:
6 tons - 6 20" torpedoes (1 ton each)
6 tons - 18 depth charges (3 per ton)



NOTE: Upon these ships entering service, the old C-class will have their designations changed.

[mentat]

Really like the C Class (although possibly biased since they are British  :)) - two small concerns though:

- in the pic -  the forward twin turret seems very close to the bow - is this intended?

- stability is very high at 1.49 - but steadiness quite mediocre at 51% - being steady gunboat seems very important in this size of ship - scope to trade-off?

[Carthaginian]

Really like the C Class (although possibly biased since they are British  :))

Thanks... I'm trying to fuse British lines and ugly Japanese funnels- though the blasted funnels are not to easy to pull off. If anyone is good at drawing that kind of thing, I'd LOVE any help they could offer.

- two small concerns though:
- in the pic -  the forward twin turret seems very close to the bow - is this intended?
- stability is very high at 1.49 - but steadiness quite mediocre at 51% - being steady gunboat seems very important in this size of ship - scope to trade-off?

1.) The fore mount is indeed close to the bow, but no more so than on a lot of destroyers.
there is still 54' between the stem and the actual pedestal the gun is mounted on, so I figure having the length of an average house between you and the water is plenty.
2.) She's trimmed for survivability, not stability or steadiness; after all, if she really wants to kill a high-value target, it's going to be done with torpedoes rather than gunfire. Her guns are mostly for keeping other destroyers from getting too close- and most destroyers aren't very survivable or very good gun platforms, wither.

[The Rock Doctor]

Funnels like that?  Or can you point us to a specific example?

[Carthaginian]

That's a lot like what I'm shooting for, though I wanted to make the trunking uglier and more visible like it was on their larger ships... here's a few examples:
http://www.warshipsww2.eu/japan/cr/img/rys-nachi.gif
http://www.warshipsww2.eu/japan/cr/img/rysagano.gif
http://www.warshipsww2.eu/japan/cr/img/rys-takao.gif
http://www.warshipsww2.eu/japan/cr/img/rys-clmogami.gif

These are (especially Yubari) most like the effect I'm going for:
http://www.warshipsww2.eu/japan/cr/img/rysyubari.gif
http://www.warshipsww2.eu/japan/cr/img/ryskinugasa.gif
http://www.warshipsww2.eu/japan/cr/img/rys-kako.gif

And a small ship with very visible trunking, the "Phantom Destroyer," U.S.S. Stewart:
http://www.warshipsww2.eu/japan/el/img/ship-p102.jpg

Probably that ship won't actually get the effect I wanted because of it's structure- I'd need something where the funnels weren't surrounded b superstructure to get the effect I really want.

[mentat]

Mmmm - Japanese CAs - drool   ;D

Japanese funnels - quaint - well ugly, but still quaint ..   ;)

Trim on the DDs - interesting - I trim for DD style gun defence (Classic RN I think) - you for TBD style attack on Big Ships  - so what does that tell me about your UNK tactical sitn ??

[Carthaginian]

Designed to deploy to Sierra Leone and perhaps be sold as an export vessel, the new Pattern 6 torpedo boat (the Pattern 4 and Pattern 5 boats were tested but rejected) is planned to be the fastest vessel in the Royal Navy, with a top speed of 33 knots on trials. The ship's elevated forecastle not only improves seakeeping, but shields the forward torpedoes from the battering effect of breaking waves. The midships 4" QF gun and two twin 1" MG's provide enough firepower to 'convince' most small vessels to avoid combat while the four 20" torpedoes provide ample reason for larger vessels to worry.

The Pattern 6 is available for licensed construction or delivery- contact your local UNK embassy for details.



Pattern 6, United Norman Kingdom Torpedo Boat laid down 1917 (Engine 1916)

Displacement:
   250 t light; 260 t standard; 288 t normal; 311 t full load

Dimensions: Length overall / water x beam x draught
   225.00 ft / 225.00 ft x 20.00 ft x 5.50 ft (normal load)
   68.58 m / 68.58 m x 6.10 m  x 1.68 m

Armament:
      1 - 4.00" / 102 mm guns in single mounts, 30.00lbs / 13.61kg shells, 1917 Model
     Quick firing gun in deck mount
     on centreline amidships
      4 - 1.00" / 25.4 mm guns (2x2 guns), 0.50lbs / 0.23kg shells, 1917 Model
     Anti-aircraft guns in deck mounts
     on side, all forward, all raised mounts - superfiring
   Weight of broadside 32 lbs / 15 kg
   Shells per gun, main battery: 200
   4 - 20.0" / 508 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.13" / 3 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 8,400 shp / 6,266 Kw = 28.44 kts
   Range 1,600nm at 14.00 kts
   Bunker at max displacement = 51 tons

Complement:
   34 - 45

Cost:
   £0.061 million / $0.242 million

Distribution of weights at normal displacement:
   Armament: 4 tons, 1.5 %
   Armour: 0 tons, 0.1 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 0 tons, 0.1 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 150 tons, 52.1 %
   Hull, fittings & equipment: 92 tons, 31.8 %
   Fuel, ammunition & stores: 38 tons, 13.1 %
   Miscellaneous weights: 4 tons, 1.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     85 lbs / 39 Kg = 2.7 x 4.0 " / 102 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.30
   Metacentric height 0.7 ft / 0.2 m
   Roll period: 9.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.12
   Seaboat quality  (Average = 1.00): 0.77

Hull form characteristics:
   Hull has raised forecastle
   Block coefficient: 0.407
   Length to Beam Ratio: 11.25 : 1
   'Natural speed' for length: 15.00 kts
   Power going to wave formation at top speed: 67 %
   Trim (Max stability = 0, Max steadiness = 100): 65
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16.00 ft / 4.88 m
      - Forecastle (15 %):   11.00 ft / 3.35 m (9.00 ft / 2.74 m aft of break)
      - Mid (40 %):      8.00 ft / 2.44 m
      - Quarterdeck (15 %):   6.50 ft / 1.98 m
      - Stern:      6.00 ft / 1.83 m
      - Average freeboard:   8.28 ft / 2.52 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 181.3 %
      - Above water (accommodation/working, high = better): 53.3 %
   Waterplane Area: 2,782 Square feet or 258 Square metres
   Displacement factor (Displacement / loading): 43 %
   Structure weight / hull surface area: 18 lbs/sq ft or 88 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.30
      - Overall: 0.55
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

  210 n. mi. @ Max Speed
  620 n. mi. @ 20 knots
1600 n. mi. @ 14 knots

Trial Speed - 33.0 knots

[Desertfox]

I like those little suckers. Pity the UNK can not sell them to New Zion.