Vickers Design Studios

[Darman]

25-knotter, Charis Destroyer laid down 1900

Displacement:
   844 t light; 876 t standard; 1,000 t normal; 1,099 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (305.25 ft / 305.25 ft) x 30.30 ft x (9.25 / 9.86 ft)
   (93.04 m / 93.04 m) x 9.24 m  x (2.82 / 3.00 m)

Armament:
      4 - 4.00" / 102 mm 50.0 cal guns - 33.88lbs / 15.37kg shells, 150 per gun
     Breech loading guns in deck mounts, 1900 Model
     4 x Single mounts on centreline ends, evenly spread
      Weight of broadside 136 lbs / 61 kg

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 9,399 ihp / 7,012 Kw = 25.00 kts
   Range 3,500nm at 10.00 kts
   Bunker at max displacement = 224 tons (100% coal)

Complement:
   88 - 115

Cost:
   £0.122 million / $0.488 million

Distribution of weights at normal displacement:
   Armament: 24 tons, 2.4 %
   Machinery: 609 tons, 60.9 %
   Hull, fittings & equipment: 212 tons, 21.2 %
   Fuel, ammunition & stores: 156 tons, 15.6 %
   Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     234 lbs / 106 Kg = 7.3 x 4.0 " / 102 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.88
   Metacentric height 2.3 ft / 0.7 m
   Roll period: 8.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 73 %
         - Recoil effect (Restricted arc if above 1.00): 0.10
   Seaboat quality  (Average = 1.00): 1.46

Hull form characteristics:
   Hull has raised forecastle,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.409 / 0.422
   Length to Beam Ratio: 10.07 : 1
   'Natural speed' for length: 17.47 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
      - Forward deck:   30.00 %,  10.00 ft / 3.05 m,  10.00 ft / 3.05 m
      - Aft deck:   35.00 %,  10.00 ft / 3.05 m,  10.00 ft / 3.05 m
      - Quarter deck:   15.00 %,  10.00 ft / 3.05 m,  10.00 ft / 3.05 m
      - Average freeboard:      11.00 ft / 3.35 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 203.5 %
      - Above water (accommodation/working, high = better): 123.9 %
   Waterplane Area: 5,725 Square feet or 532 Square metres
   Displacement factor (Displacement / loading): 33 %
   Structure weight / hull surface area: 24 lbs/sq ft or 115 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 0.93
      - Overall: 0.54
   Hull space for machinery, storage, compartmentation is extremely poor
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[eltf177]

No TT's? And what is the Main Battery layout?

[Darman]

No TT's? And what is the Main Battery layout?

I actually made this to post on another forum to see what the range of a triple-expansion steam engine on a 1,000t DD would be.  Range was longer than I'd thought, but the ship doesn't have much in the way of weapons.  In that universe there are no torpedoes, hence no torpedo tubes.  And I'd say ABXY for the layout, although I hadn't really thought about it. 

[eltf177]

Understand. However, for an AB/XY layout you will have to superfire 2 guns. And on a ship this small that will throw the existing calculations off a bit...

[Walter]

Something makes me think that they would be back to back. With no torpedo tubes present to take away available deckspace, it might work.

[eltf177]

Something makes me think that they would be back to back. With no torpedo tubes present to take away available deckspace, it might work.

True. In fact, with no TT's even an A/P/Q/Y layout is possible. Of course, with that much deck space available I'd look at trying to shoehorn a fifth gun in amidships.

[The Rock Doctor]

In the absence of torpedoes, what's the mission of a small, fast, unarmored ship with low endurance and small guns?

[Darman]

the particular universe I was designing this for has a preponderance of wooden and maybe iron-hulled sailing warships.  None will have steam-power as it is against their religion.  They have been so thoroughly beaten at sea that they aren't concentrating on finding new ways of fighting at sea, they're kinda giving up.  Thus any steel-hulled warship is virtually impregnable.  This unit needs to cover vast distances (think the Pacific Ocean) with rapid-firing breech-loading cannon to devastate enemy shipping in as many places as possible.