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The World of Navalism => Imperial Navy => Imperial Roman Republic => Player Nations => Cruisers => Topic started by: snip on May 15, 2023, 12:21:01 AM
Five Ships
--IRS Messana
--IRS Havre-de-Grâce
--IRS Montpelhièr
--IRS Dubris
--IRS Santa Rochelle
QuoteGPC-21A-3, Imperial Roman Republic Cruiser laid down 1921
Displacement:
9,000 t light; 9,343 t standard; 10,581 t normal; 11,571 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(569.23 ft / 557.74 ft) x 63.98 ft x (21.33 / 22.80 ft)
(173.50 m / 170.00 m) x 19.50 m x (6.50 / 6.95 m)
Armament:
8 - 7.09" / 180 mm 50.0 cal guns - 187.39lbs / 85.00kg shells, 150 per gun
Breech loading guns in turret on barbette mounts, 1915 Model
4 x 2-gun mounts on centreline ends, evenly spread
2 raised mounts - superfiring
2 - 3.94" / 100 mm 45.0 cal guns - 30.86lbs / 14.00kg shells, 175 per gun
Anti-air guns in deck mounts, 1917 Model
2 x Single mounts on sides, forward deck aft
2 raised mounts
6 - 0.26" / 6.5 mm 110.0 cal guns - 0.01lbs / 0.00kg shells, 15,000 per gun
Machine guns in deck mounts, 1911 Model
6 x Single mounts on sides, forward evenly spread
6 raised mounts
Weight of broadside 1,561 lbs / 708 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 376.15 ft / 114.65 m 16.40 ft / 5.00 m
Ends: Unarmoured
Main Belt covers 104 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.36" / 60 mm 1.18" / 30 mm 2.36" / 60 mm
2nd: 0.20" / 5 mm - -
3rd: 0.20" / 5 mm - -
- Armoured deck - single deck:
For and Aft decks: 1.38" / 35 mm
Forecastle: 0.00" / 0 mm Quarter deck: 1.38" / 35 mm
- Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 80,000 shp / 59,680 Kw = 31.02 kts
Range 10,000nm at 14.00 kts
Bunker at max displacement = 2,228 tons
Complement:
521 - 678
Cost:
£2.192 million / $8.769 million
Distribution of weights at normal displacement:
Armament: 484 tons, 4.6 %
- Guns: 484 tons, 4.6 %
Armour: 1,613 tons, 15.2 %
- Belts: 802 tons, 7.6 %
- Armament: 212 tons, 2.0 %
- Armour Deck: 558 tons, 5.3 %
- Conning Tower: 41 tons, 0.4 %
Machinery: 2,755 tons, 26.0 %
Hull, fittings & equipment: 3,773 tons, 35.7 %
Fuel, ammunition & stores: 1,581 tons, 14.9 %
Miscellaneous weights: 375 tons, 3.5 %
- Hull below water: 80 tons
- Hull above water: 100 tons
- On freeboard deck: 170 tons
- Above deck: 25 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
13,964 lbs / 6,334 Kg = 78.5 x 7.1 " / 180 mm shells or 1.6 torpedoes
Stability (Unstable if below 1.00): 1.26
Metacentric height 3.9 ft / 1.2 m
Roll period: 13.6 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.34
Seaboat quality (Average = 1.00): 1.22
Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.487 / 0.498
Length to Beam Ratio: 8.72 : 1
'Natural speed' for length: 23.62 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 41
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 18.00 %, 27.07 ft / 8.25 m, 25.43 ft / 7.75 m
- Forward deck: 40.00 %, 25.43 ft / 7.75 m, 25.43 ft / 7.75 m
- Aft deck: 27.44 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
- Quarter deck: 14.56 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
- Average freeboard: 21.76 ft / 6.63 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 100.7 %
- Above water (accommodation/working, high = better): 186.8 %
Waterplane Area: 23,489 Square feet or 2,182 Square metres
Displacement factor (Displacement / loading): 117 %
Structure weight / hull surface area: 106 lbs/sq ft or 518 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.80
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Good seaboat, rides out heavy weather easily
Misc Weight Distribution
-Below Water (80t)
--30t Additional Pumps
--30t Additional Damage Control Equipment
--10t Improved Food & Drink storage
-Above Water (100t)
--30t Additional Damage Control Equipment
--20t Enhanced Ventilation and Crew Comfort
--50t Long Range Wireless (2x)
-On Deck (170t)
--50t 1918 Fire Control
--50t Reserved for Future Aviation Facilities (2x Recon Plane & 2x Catapults)
--32t 8x530mm (1913) Torpedo Tubes (2x4 mounts Aft Deck Forward)
--25t Enhanced Ventilation and Crew Comfort
--10t Short Range Wireless
--3t Construction Reserve
-Above Deck (25t)
--10t Additional Optical Spotting Equipment
--10t Night Fighting Equipment
--5t Improved Signaling Equipment