E Class Destroyer

[snip]

The most powerful destroyer in Imperial Navy service in 1910.

20 Ships, pennant DD-51 though DD-70. (DD-51 though DD-60 Sunk July 1914, remaining aside from DD-66 and DD-69 sunk August 1914)

E-Class, Imperial Roman Republic Destroyer laid down 1908

Displacement:
   750 t light; 781 t standard; 848 t normal; 902 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (259.20 ft / 252.62 ft) x 26.25 ft x (11.48 / 11.95 ft)
   (79.00 m / 77.00 m) x 8.00 m  x (3.50 / 3.64 m)

Armament:
      4 - 3.94" / 100 mm 45.0 cal guns - 30.86lbs / 14.00kg shells, 175 per gun
     Quick firing guns in deck mounts, 1906 Model
     2 x Single mounts on centreline ends, evenly spread
      1 raised mount aft - superfiring
     2 x Single mounts on sides, forward deck aft
      4 - 1.77" / 45.0 mm 50.0 cal guns - 3.31lbs / 1.50kg shells, 250 per gun
     Quick firing guns in deck mounts, 1905 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 137 lbs / 62 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 24,011 shp / 17,912 Kw = 31.28 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 121 tons

Complement:
   78 - 102

Cost:
   £0.101 million / $0.406 million

Distribution of weights at normal displacement:
   Armament: 25 tons, 3.0 %
      - Guns: 25 tons, 3.0 %
   Armour: 5 tons, 0.6 %
      - Armament: 5 tons, 0.6 %
   Machinery: 489 tons, 57.6 %
   Hull, fittings & equipment: 191 tons, 22.5 %
   Fuel, ammunition & stores: 98 tons, 11.5 %
   Miscellaneous weights: 40 tons, 4.7 %
      - On freeboard deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     158 lbs / 72 Kg = 5.2 x 3.9 " / 100 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.19
   Metacentric height 0.9 ft / 0.3 m
   Roll period: 11.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.22
   Seaboat quality  (Average = 1.00): 0.64

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.390 / 0.399
   Length to Beam Ratio: 9.63 : 1
   'Natural speed' for length: 15.89 kts
   Power going to wave formation at top speed: 71 %
   Trim (Max stability = 0, Max steadiness = 100): 78
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 2.40 ft / 0.73 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Forward deck:   20.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Aft deck:   45.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Quarter deck:   15.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Average freeboard:      10.17 ft / 3.10 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 194.1 %
      - Above water (accommodation/working, high = better): 92.4 %
   Waterplane Area: 4,054 Square feet or 377 Square metres
   Displacement factor (Displacement / loading): 33 %
   Structure weight / hull surface area: 27 lbs/sq ft or 130 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.76
      - Overall: 0.56
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Caution: Lacks seaworthiness - very limited seakeeping ability

Misc Distribution
--On Deck (45t)
----20t 8x450mm Torpedos [Two twin tube mounts per side]
----10t Short-Range Wireless
----5t Improved spray protections for Torpedo tubes
----5t Construction Reserve.

[snip]

In 1913 all 20 ships of this class were updated to receive 1912 fire control and 530mm torpedo tubes.

DD-51 though DD-60 were sunk in this configuration at Grand Turk while DD-61 though D-65, DD-67, DD-68, and DD-70 were sunk in this configuration at the Battle of Ironclad Bay.

E-Class, Imperial Roman Republic Destroyer laid down 1908

Displacement:
   750 t light; 781 t standard; 848 t normal; 902 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (259.20 ft / 252.62 ft) x 26.25 ft x (11.48 / 11.95 ft)
   (79.00 m / 77.00 m) x 8.00 m  x (3.50 / 3.64 m)

Armament:
      4 - 3.94" / 100 mm 45.0 cal guns - 30.86lbs / 14.00kg shells, 175 per gun
     Quick firing guns in deck mounts, 1906 Model
     2 x Single mounts on centreline ends, evenly spread
      1 raised mount aft - superfiring
     2 x Single mounts on sides, forward deck aft
      4 - 1.77" / 45.0 mm 50.0 cal guns - 3.31lbs / 1.50kg shells, 250 per gun
     Quick firing guns in deck mounts, 1905 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 137 lbs / 62 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 24,011 shp / 17,912 Kw = 31.28 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 121 tons

Complement:
   78 - 102

Cost:
   £0.101 million / $0.406 million

Distribution of weights at normal displacement:
   Armament: 25 tons, 3.0 %
      - Guns: 25 tons, 3.0 %
   Armour: 5 tons, 0.6 %
      - Armament: 5 tons, 0.6 %
   Machinery: 489 tons, 57.6 %
   Hull, fittings & equipment: 191 tons, 22.5 %
   Fuel, ammunition & stores: 98 tons, 11.5 %
   Miscellaneous weights: 40 tons, 4.7 %
      - On freeboard deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     158 lbs / 72 Kg = 5.2 x 3.9 " / 100 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.19
   Metacentric height 0.9 ft / 0.3 m
   Roll period: 11.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.22
   Seaboat quality  (Average = 1.00): 0.64

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.390 / 0.399
   Length to Beam Ratio: 9.63 : 1
   'Natural speed' for length: 15.89 kts
   Power going to wave formation at top speed: 71 %
   Trim (Max stability = 0, Max steadiness = 100): 78
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 2.40 ft / 0.73 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Forward deck:   20.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Aft deck:   45.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Quarter deck:   15.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Average freeboard:      10.17 ft / 3.10 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 194.1 %
      - Above water (accommodation/working, high = better): 92.4 %
   Waterplane Area: 4,054 Square feet or 377 Square metres
   Displacement factor (Displacement / loading): 33 %
   Structure weight / hull surface area: 27 lbs/sq ft or 130 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.76
      - Overall: 0.56
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Caution: Lacks seaworthiness - very limited seakeeping ability

Misc Distribution
--On Deck (45t)
----24t 8x530mm Torpedos [Two twin tube mounts per side]
----10t Short-Range Wireless
----5t Improved spray protections for Torpedo tubes
----2t 1912 Fire Control
----4t Construction Reserve.

[snip]

In 1923H1, the two surviving ships had been updated to 1918 Fire Control.

[snip]

Over 1926, both DD-66 and DD-69 were refit to the following configuration.

E-Class (1926 Refit), Imperial Roman Republic Destroyer laid down 1908

Displacement:
   750 t light; 781 t standard; 848 t normal; 902 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (258.98 ft / 252.62 ft) x 26.25 ft x (11.48 / 11.95 ft)
   (78.94 m / 77.00 m) x 8.00 m  x (3.50 / 3.64 m)

Armament:
      2 - 3.54" / 90.0 mm 50.0 cal guns - 20.94lbs / 9.50kg shells, 175 per gun
     Quick firing guns in deck mount, 1926 Model
     1 x Twin mount on centreline, forward deck forward
      2 - 2.24" / 57.0 mm 55.0 cal guns - 6.06lbs / 2.75kg shells, 500 per gun
     Quick firing guns in deck mount, 1926 Model
     1 x Twin mount on centreline, aft deck aft
      1 raised mount
      4 - 1.10" / 28.0 mm 55.0 cal guns - 0.72lbs / 0.33kg shells, 4,000 per gun
     Anti-air guns in deck mount, 1926 Model
     1 x Single mount on centreline, forward deck aft
      1 raised mount
      Weight of broadside 57 lbs / 26 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.39" / 10 mm   0.20" / 5 mm            -
   2nd:   0.20" / 5 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 24,011 shp / 17,912 Kw = 31.28 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 121 tons

Complement:
   78 - 102

Cost:
   £0.099 million / $0.396 million

Distribution of weights at normal displacement:
   Armament: 12 tons, 1.4 %
      - Guns: 12 tons, 1.4 %
   Armour: 2 tons, 0.2 %
      - Armament: 2 tons, 0.2 %
   Machinery: 494 tons, 58.2 %
   Hull, fittings & equipment: 203 tons, 23.9 %
   Fuel, ammunition & stores: 98 tons, 11.6 %
   Miscellaneous weights: 40 tons, 4.7 %
      - On freeboard deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     168 lbs / 76 Kg = 7.6 x 3.5 " / 90 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.22
   Metacentric height 1.0 ft / 0.3 m
   Roll period: 11.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 47 %
         - Recoil effect (Restricted arc if above 1.00): 0.10
   Seaboat quality  (Average = 1.00): 0.56

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.390 / 0.398
   Length to Beam Ratio: 9.63 : 1
   'Natural speed' for length: 15.89 kts
   Power going to wave formation at top speed: 71 %
   Trim (Max stability = 0, Max steadiness = 100): 78
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 2.40 ft / 0.73 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Forward deck:   20.00 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Aft deck:   45.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Quarter deck:   15.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Average freeboard:      9.84 ft / 3.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 193.2 %
      - Above water (accommodation/working, high = better): 89.9 %
   Waterplane Area: 4,053 Square feet or 377 Square metres
   Displacement factor (Displacement / loading): 34 %
   Structure weight / hull surface area: 27 lbs/sq ft or 134 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.53
      - Longitudinal: 1.66
      - Overall: 0.60
   Cramped machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Caution: Lacks seaworthiness - very limited seakeeping ability

Misc Distribution
On Deck (40t)
--15t 3x610mm Torpedoes [Single Tripple Mount Aft Deck Centerline]
--10t Short-Range Wireless
--5t Improved spray protections for Torpedo tubes
--2t 1918 Fire Control
--5t Night fighting Equpment
--3t Construction Reserve.