Aiming for a more 'manageable' and 'economical' design for an initial battleship for the Confederate Navy, I have taken "Ye Olde Choppin' Axe" to the
Tennessee and this is the result- the
Georgia. Overall displacement is reduced by about 3,300 tons across all load states, making the vessel more on par with the OTL
U.S.S. Maine and
U.S.S. Texas of the same period.
Protection is roughly equivalent to both these vessels along the waterline (10" belt, 188' L x 8' H); however the
Georgia lacks the large amount of unprotected hull that plagues both these designs, adding a 5" upper belt and a 5" end belt to complete the waterline coverage. The 12.75"/L35 gun barbettes are 10" thick and the 6.4"/L35 casemates are protected by 5" armored boxes locally.
The vessel is armed with two 12.75" guns, eight 6.4" guns and eight 2.25" guns. The 12.75" guns fire a 1000 pound shell, and 60 rounds are carried for both main guns. Sited in open barbettes (which function well enough in the mild, sub-tropical weather), these guns have all-around loading, but fixed loading elevations. The 6.4" guns fire 125 pound shells at a rate of 3 per minute (sustained), but have limited coverage of the fore and aft quarters.
Speed is slightly lower than Union navy counterparts- just under 16 knots. Their 4300 n. mi. range (@ 10 knots) is judged sufficient for defending the Confederate coast. Unlike most Confederate vessels, they lack torpedo carriages; the deck was simply too crowded to add them. They are (in comparison to figures on some of the ships of the time) very seaworthy and should be rather easy ships to fight.
Georgia, Confederate States of America Ironclad laid down 1886
Barbette ship
Displacement:
6,100 t light; 6,347 t standard; 7,000 t normal; 7,522 t full load
Dimensions: Length overall / water x beam x draught
300.00 ft / 300.00 ft x 60.00 ft x 22.00 ft (normal load)
91.44 m / 91.44 m x 18.29 m x 6.71 m
Armament:
2 - 12.75" / 324 mm guns in single mounts, 1,000.00lbs / 453.59kg shells, 1886 Model
Breech loading guns in open barbettes
on centreline ends, evenly spread
8 - 6.40" / 163 mm guns in single mounts, 125.00lbs / 56.70kg shells, 1886 Model
Breech loading guns in casemate mounts
on side, all amidships
8 - 2.25" / 57.2 mm guns in single mounts, 5.00lbs / 2.27kg shells, 1886 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 3,040 lbs / 1,379 kg
Shells per gun, main battery: 60
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 10.0" / 254 mm 188.00 ft / 57.30 m 8.00 ft / 2.44 m
Ends: 5.00" / 127 mm 112.00 ft / 34.14 m 8.00 ft / 2.44 m
Upper: 5.00" / 127 mm 122.00 ft / 37.19 m 10.00 ft / 3.05 m
Main Belt covers 96 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: - - 10.0" / 254 mm
2nd: 5.00" / 127 mm 5.00" / 127 mm -
3rd: 0.25" / 6 mm - -
- Armour deck: 2.00" / 51 mm, Conning tower: 10.00" / 254 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 6,200 ihp / 4,625 Kw = 15.76 kts
Range 4,360nm at 10.00 kts
Bunker at max displacement = 1,175 tons (100% coal)
Complement:
382 - 497
Cost:
£0.695 million / $2.779 million
Distribution of weights at normal displacement:
Armament: 372 tons, 5.3 %
Armour: 2,245 tons, 32.1 %
- Belts: 1,171 tons, 16.7 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 499 tons, 7.1 %
- Armour Deck: 496 tons, 7.1 %
- Conning Tower: 79 tons, 1.1 %
Machinery: 1,204 tons, 17.2 %
Hull, fittings & equipment: 2,212 tons, 31.6 %
Fuel, ammunition & stores: 900 tons, 12.9 %
Miscellaneous weights: 68 tons, 1.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
7,065 lbs / 3,205 Kg = 7.3 x 12.8 " / 324 mm shells or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.37
Metacentric height 4.1 ft / 1.2 m
Roll period: 12.5 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.35
Seaboat quality (Average = 1.00): 1.76
Hull form characteristics:
Hull has raised forecastle, raised quarterdeck
Block coefficient: 0.619
Length to Beam Ratio: 5.00 : 1
'Natural speed' for length: 17.32 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 40
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 17.00 ft / 5.18 m
- Forecastle (15 %): 17.00 ft / 5.18 m (14.00 ft / 4.27 m aft of break)
- Mid (50 %): 14.00 ft / 4.27 m
- Quarterdeck (10 %): 17.00 ft / 5.18 m (14.00 ft / 4.27 m before break)
- Stern: 17.00 ft / 5.18 m
- Average freeboard: 14.75 ft / 4.50 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 95.9 %
- Above water (accommodation/working, high = better): 93.5 %
Waterplane Area: 13,396 Square feet or 1,245 Square metres
Displacement factor (Displacement / loading): 91 %
Structure weight / hull surface area: 111 lbs/sq ft or 542 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.88
- Longitudinal: 3.05
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather