G-Class Destroyer

snip · June 23, 2020, 10:42:13 PM

Half-sisters of the preceding F-Class, the G class moved to the uqbiquitus 140mmL55 for its main battery.

Ten Ships, pennants DD-91 to DD-100 (all sunk August 1914).

QuoteG-Class, Imperial Roman Republic Destroyer laid down 1912

Displacement:
1,000 t light; 1,049 t standard; 1,115 t normal; 1,168 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(287.07 ft / 278.87 ft) x 29.53 ft x (11.48 / 11.84 ft)
(87.50 m / 85.00 m) x 9.00 m x (3.50 / 3.61 m)

Armament:
3 - 5.51" / 140 mm 55.0 cal guns - 90.37lbs / 40.99kg shells, 175 per gun
Quick firing guns in deck mounts, 1902 Model
2 x Single mounts on centreline ends, evenly spread
1 raised mount aft - superfiring
1 x Single mount on centreline, forward deck aft
2 - 1.77" / 45.0 mm 50.0 cal guns - 2.94lbs / 1.34kg shells, 250 per gun
Quick firing guns in deck mounts, 1912 Model
2 x Single mounts on sides, aft deck centre
2 raised mounts
4 - 0.26" / 6.5 mm 60.0 cal guns - 0.01lbs / 0.00kg shells, 1,500 per gun
Machine guns in deck mounts, 1912 Model
4 x Single mounts on sides, evenly spread
4 raised mounts
Weight of broadside 277 lbs / 126 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm - -
2nd: 0.59" / 15 mm - -
3rd: 0.59" / 15 mm - -

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 28,000 shp / 20,888 Kw = 31.44 kts
Range 3,000nm at 10.00 kts
Bunker at max displacement = 118 tons

Complement:
96 - 125

Cost:
£0.136 million / $0.543 million

Distribution of weights at normal displacement:
Armament: 59 tons, 5.3 %
- Guns: 59 tons, 5.3 %
Armour: 19 tons, 1.7 %
- Armament: 19 tons, 1.7 %
Machinery: 605 tons, 54.2 %
Hull, fittings & equipment: 268 tons, 24.0 %
Fuel, ammunition & stores: 115 tons, 10.3 %
Miscellaneous weights: 50 tons, 4.5 %
- On freeboard deck: 50 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
253 lbs / 115 Kg = 3.0 x 5.5 " / 140 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 1.1 ft / 0.3 m
Roll period: 11.6 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.43
Seaboat quality (Average = 1.00): 0.75

Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.413 / 0.419
Length to Beam Ratio: 9.44 : 1
'Natural speed' for length: 16.70 kts
Power going to wave formation at top speed: 70 %
Trim (Max stability = 0, Max steadiness = 100): 67
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 2.23 ft / 0.68 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 16.40 ft / 5.00 m, 15.58 ft / 4.75 m
- Forward deck: 40.00 %, 15.58 ft / 4.75 m, 15.58 ft / 4.75 m
- Aft deck: 25.00 %, 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: 12.04 ft / 3.67 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 189.5 %
- Above water (accommodation/working, high = better): 122.8 %
Waterplane Area: 5,108 Square feet or 475 Square metres
Displacement factor (Displacement / loading): 45 %
Structure weight / hull surface area: 31 lbs/sq ft or 152 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.99
- Overall: 0.57
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Misc Distribution
--On Deck (50t)
----36t 12x530mm Torpedos [Two triple tube mounts per side]
----2t Improved spray protections for Torpedo tubes
----10t Short-Range Wireless
----2t Minesweeping Paravanes

snip · October 04, 2020, 01:55:16 AM

In 1914H1, all ten of these ships received a refit for 1912 Fire Control. To accommodate this, the non-integrated short-range wireless was removed.

All ten ships of this class were sunk in this configuration at the Battle of Ironclad Bay

QuoteG-Class, Imperial Roman Republic Destroyer laid down 1912

Displacement:
1,000 t light; 1,049 t standard; 1,115 t normal; 1,168 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(287.07 ft / 278.87 ft) x 29.53 ft x (11.48 / 11.84 ft)
(87.50 m / 85.00 m) x 9.00 m x (3.50 / 3.61 m)

Armament:
3 - 5.51" / 140 mm 55.0 cal guns - 90.37lbs / 40.99kg shells, 175 per gun
Quick firing guns in deck mounts, 1902 Model
2 x Single mounts on centreline ends, evenly spread
1 raised mount aft - superfiring
1 x Single mount on centreline, forward deck aft
2 - 1.77" / 45.0 mm 50.0 cal guns - 2.94lbs / 1.34kg shells, 250 per gun
Quick firing guns in deck mounts, 1912 Model
2 x Single mounts on sides, aft deck centre
2 raised mounts
4 - 0.26" / 6.5 mm 60.0 cal guns - 0.01lbs / 0.00kg shells, 1,500 per gun
Machine guns in deck mounts, 1912 Model
4 x Single mounts on sides, evenly spread
4 raised mounts
Weight of broadside 277 lbs / 126 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm - -
2nd: 0.59" / 15 mm - -
3rd: 0.59" / 15 mm - -

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 28,000 shp / 20,888 Kw = 31.44 kts
Range 3,000nm at 10.00 kts
Bunker at max displacement = 118 tons

Complement:
96 - 125

Cost:
£0.136 million / $0.543 million

Distribution of weights at normal displacement:
Armament: 59 tons, 5.3 %
- Guns: 59 tons, 5.3 %
Armour: 19 tons, 1.7 %
- Armament: 19 tons, 1.7 %
Machinery: 605 tons, 54.2 %
Hull, fittings & equipment: 268 tons, 24.0 %
Fuel, ammunition & stores: 115 tons, 10.3 %
Miscellaneous weights: 50 tons, 4.5 %
- On freeboard deck: 50 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
253 lbs / 115 Kg = 3.0 x 5.5 " / 140 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 1.1 ft / 0.3 m
Roll period: 11.6 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.43
Seaboat quality (Average = 1.00): 0.75

Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.413 / 0.419
Length to Beam Ratio: 9.44 : 1
'Natural speed' for length: 16.70 kts
Power going to wave formation at top speed: 70 %
Trim (Max stability = 0, Max steadiness = 100): 67
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 2.23 ft / 0.68 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 16.40 ft / 5.00 m, 15.58 ft / 4.75 m
- Forward deck: 40.00 %, 15.58 ft / 4.75 m, 15.58 ft / 4.75 m
- Aft deck: 25.00 %, 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: 12.04 ft / 3.67 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 189.5 %
- Above water (accommodation/working, high = better): 122.8 %
Waterplane Area: 5,108 Square feet or 475 Square metres
Displacement factor (Displacement / loading): 45 %
Structure weight / hull surface area: 31 lbs/sq ft or 152 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.99
- Overall: 0.57
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Misc Distribution
--On Deck (50t)
----36t 12x530mm Torpedos [Two triple tube mounts per side]
----2t Improved spray protections for Torpedo tubes
----6t 1912 Fire Control
----2t Minesweeping Paravanes
----4t Construction Reserve

G-Class Destroyer

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