Audax Class Battleship

snip · August 12, 2020, 03:58:57 PM

Two Ships:
IRS Audax
IRS Libertatem

QuoteAudax Class, Imperial Roman Republic Battleship laid down 1912

Displacement:
27,500 t light; 29,260 t standard; 30,226 t normal; 30,999 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(633.20 ft / 623.36 ft) x 95.14 ft x (26.25 / 26.83 ft)
(193.00 m / 190.00 m) x 29.00 m x (8.00 / 8.18 m)

Armament:
12 - 13.39" / 340 mm 45.0 cal guns - 1,212.54lbs / 550.00kg shells, 110 per gun
Breech loading guns in turret on barbette mounts, 1909 Model
3 x 3-gun mounts on centreline ends, majority forward
1 raised mount - superfiring
1 x 3-gun mount on centreline, aft deck forward
20 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
Quick firing guns in casemate mounts, 1909 Model
8 x Single mounts on sides, forward evenly spread
12 x Single mounts on sides, aft evenly spread
8 hull mounts in casemates- Limited use in heavy seas
16 - 3.94" / 100 mm 45.0 cal guns - 30.86lbs / 14.00kg shells, 350 per gun
Quick firing guns in deck mounts, 1909 Model
8 x Single mounts on sides, evenly spread
8 raised mounts
8 x Single mounts on centreline, evenly spread
8 double raised mounts
4 - 1.77" / 45.0 mm 50.0 cal guns - 2.93lbs / 1.33kg shells, 450 per gun
Quick firing guns in deck mounts, 1905 Model
4 x Single mounts on side ends, evenly spread
10 - 0.26" / 6.5 mm 110.0 cal guns - 0.01lbs / 0.00kg shells, 5,000 per gun
Machine guns in deck mounts, 1911 Model
10 x Single mounts on sides, evenly spread
10 raised mounts
Weight of broadside 16,776 lbs / 7,609 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.6" / 320 mm 405.18 ft / 123.50 m 18.04 ft / 5.50 m
Ends: 3.15" / 80 mm 218.14 ft / 66.49 m 6.56 ft / 2.00 m
Main Belt covers 100 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
2.36" / 60 mm 405.18 ft / 123.50 m 26.25 ft / 8.00 m
Beam between torpedo bulkheads 78.74 ft / 24.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 17.3" / 440 mm 7.09" / 180 mm 11.0" / 280 mm
2nd: 3.94" / 100 mm 3.94" / 100 mm 3.94" / 100 mm
3rd: 0.98" / 25 mm - -
4th: 0.59" / 15 mm - -
5th: 0.39" / 10 mm - -

- Armoured deck - single deck:
For and Aft decks: 2.95" / 75 mm

- Conning towers: Forward 13.78" / 350 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 64,000 shp / 47,744 Kw = 24.43 kts
Range 5,500nm at 10.00 kts
Bunker at max displacement = 1,739 tons

Complement:
1,146 - 1,490

Cost:
£2.803 million / $11.213 million

Distribution of weights at normal displacement:
Armament: 3,536 tons, 11.7 %
- Guns: 3,536 tons, 11.7 %
Armour: 10,338 tons, 34.2 %
- Belts: 4,215 tons, 13.9 %
- Torpedo bulkhead: 929 tons, 3.1 %
- Armament: 2,820 tons, 9.3 %
- Armour Deck: 2,085 tons, 6.9 %
- Conning Tower: 288 tons, 1.0 %
Machinery: 2,552 tons, 8.4 %
Hull, fittings & equipment: 9,584 tons, 31.7 %
Fuel, ammunition & stores: 2,726 tons, 9.0 %
Miscellaneous weights: 1,490 tons, 4.9 %
- Hull below water: 800 tons
- Hull above water: 200 tons
- On freeboard deck: 450 tons
- Above deck: 40 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
40,137 lbs / 18,206 Kg = 33.5 x 13.4 " / 340 mm shells or 6.2 torpedoes
Stability (Unstable if below 1.00): 1.24
Metacentric height 6.8 ft / 2.1 m
Roll period: 15.3 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.62
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has low quarterdeck ,
an extended bulbous bow and a cruiser stern
Block coefficient (normal/deep): 0.680 / 0.682
Length to Beam Ratio: 6.55 : 1
'Natural speed' for length: 24.97 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 18.86 ft / 5.75 m, 18.86 ft / 5.75 m
- Forward deck: 30.00 %, 18.86 ft / 5.75 m, 18.86 ft / 5.75 m
- Aft deck: 35.00 %, 18.86 ft / 5.75 m, 18.86 ft / 5.75 m
- Quarter deck: 15.00 %, 9.84 ft / 3.00 m, 9.84 ft / 3.00 m
- Average freeboard: 17.51 ft / 5.34 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 92.4 %
- Above water (accommodation/working, high = better): 146.3 %
Waterplane Area: 46,674 Square feet or 4,336 Square metres
Displacement factor (Displacement / loading): 97 %
Structure weight / hull surface area: 186 lbs/sq ft or 909 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.20
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room

Misc Distribution
--Below Water (800t)
----640t Electric Drive
----50t Additional Pumps
----20t Enhanced Damage Control Equipment
----20t Enhanced Ventilation and Crew Comfort
----70t Construction Reserve
--Above Water(200t)
----50t Flag Facilities
----60t Improved Officer Accommodations
----60t Improved Crew Accommodations
----20t Short-Range Wireless (x2)
----10t Construction Reserve
--On Deck (450t)
----355t 1912 Fire Control
----40t Flag Facilities
----20t Admiralty Accommodations
----25t Long-Range Wireless
----10t Construction Reserve
--Above Deck (40t)
----20t Improved Acquisition Structures
----10t Additional Searchlights
----10t Improved Signaling Equipment

snip · September 13, 2022, 10:24:23 PM

In 1921H1, both ships of this class were updated to 1918 Fire Control.

Audax Class Battleship

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