Memnon class Atlantean Battleship laid down 1929
Memnon, Philomedes
*yes I know those additional 20mm mounts are missing aft!*
Displacement:
38,537 t light; 40,906 t standard; 45,750 t normal; 49,625 t full load
Dimensions: Length overall / water x beam x draught
745.94 ft / 732.00 ft x 108.00 ft x 32.15 ft (normal load)
227.36 m / 223.11 m x 32.92 m x 9.80 m
Armament:
9 - 15.00" / 381 mm guns (3x3 guns), 1,687.50lbs / 765.44kg shells, 1929 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
15 - 6.00" / 152 mm guns (5x3 guns), 108.00lbs / 48.99kg shells, 1929 Model
Breech loading guns in turrets (on barbettes)
on side, all amidships, 1 raised mount - superfiring
16 - 3.00" / 76.2 mm guns (8x2 guns), 13.50lbs / 6.12kg shells, 1929 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, all raised mounts
20 - 1.57" / 39.9 mm guns (10x2 guns), 1.93lbs / 0.88kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
24 - 0.79" / 20.0 mm guns (8x3 guns), 0.24lbs / 0.11kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 17,068 lbs / 7,742 kg
Shells per gun, main battery: 150
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 16.0" / 406 mm 390.00 ft / 118.87 m 14.00 ft / 4.27 m
Ends: Unarmoured
Main Belt covers 82 % of normal length
- Torpedo Bulkhead:
2.35" / 60 mm 390.00 ft / 118.87 m 28.00 ft / 8.53 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 16.5" / 420 mm 11.0" / 280 mm 14.0" / 356 mm
2nd: 3.94" / 100 mm 2.35" / 60 mm 2.76" / 70 mm
3rd: 1.00" / 25 mm 1.00" / 25 mm -
- Armour deck: 6.25" / 159 mm, Conning tower: 16.00" / 406 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 134,048 shp / 100,000 Kw = 28.23 kts
Range 15,000nm at 15.00 kts
Bunker at max displacement = 8,719 tons
Complement:
1,563 - 2,033
Cost:
£14.869 million / $59.477 million
Distribution of weights at normal displacement:
Armament: 2,134 tons, 4.7 %
Armour: 15,916 tons, 34.8 %
- Belts: 3,981 tons, 8.7 %
- Torpedo bulkhead: 949 tons, 2.1 %
- Armament: 3,670 tons, 8.0 %
- Armour Deck: 6,875 tons, 15.0 %
- Conning Tower: 441 tons, 1.0 %
Machinery: 4,117 tons, 9.0 %
Hull, fittings & equipment: 16,221 tons, 35.5 %
Fuel, ammunition & stores: 7,212 tons, 15.8 %
Miscellaneous weights: 150 tons, 0.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
63,897 lbs / 28,983 Kg = 37.9 x 15.0 " / 381 mm shells or 10.0 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 6.1 ft / 1.9 m
Roll period: 18.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.63
Seaboat quality (Average = 1.00): 1.11
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.630
Length to Beam Ratio: 6.78 : 1
'Natural speed' for length: 27.06 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 63
Bow angle (Positive = bow angles forward): 17.00 degrees
Stern overhang: 4.40 ft / 1.34 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.22 ft / 9.52 m
- Forecastle (21 %): 22.00 ft / 6.71 m
- Mid (50 %): 22.00 ft / 6.71 m
- Quarterdeck (22 %): 22.00 ft / 6.71 m
- Stern: 22.00 ft / 6.71 m
- Average freeboard: 22.77 ft / 6.94 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 81.4 %
- Above water (accommodation/working, high = better): 159.4 %
Waterplane Area: 59,456 Square feet or 5,524 Square metres
Displacement factor (Displacement / loading): 111 %
Structure weight / hull surface area: 199 lbs/sq ft or 971 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.36
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
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Hector, Atlantean Heavy Cruiser laid down 1928
Hector, Apollo
Displacement:
10,839 t light; 11,329 t standard; 12,432 t normal; 13,315 t full load
Dimensions: Length overall / water x beam x draught
595.92 ft / 585.00 ft x 66.00 ft x 24.50 ft (normal load)
181.64 m / 178.31 m x 20.12 m x 7.47 m
Armament:
9 - 8.00" / 203 mm guns (3x3 guns), 256.00lbs / 116.12kg shells, 1928 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
8 - 4.50" / 114 mm guns (4x2 guns), 45.56lbs / 20.67kg shells, 1928 Model
Dual purpose guns in deck mounts
on side, all amidships
2 - 4.50" / 114 mm guns (1x2 guns), 45.56lbs / 20.67kg shells, 1928 Model
Dual purpose guns in deck mount
on centreline aft, all raised guns - superfiring
8 - 1.57" / 39.9 mm guns (4x2 guns), 1.93lbs / 0.88kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
18 - 0.79" / 19.9 mm guns (6x3 guns), 0.24lbs / 0.11kg shells, 1928 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 2,779 lbs / 1,261 kg
Shells per gun, main battery: 150
8 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.70" / 119 mm 390.00 ft / 118.87 m 10.00 ft / 3.05 m
Ends: Unarmoured
Main Belt covers 103 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.50" / 140 mm 3.92" / 100 mm 3.92" / 100 mm
2nd: 1.00" / 25 mm - -
3rd: 1.00" / 25 mm - -
- Armour deck: 2.35" / 60 mm, Conning tower: 3.15" / 80 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 96,795 shp / 72,209 Kw = 32.00 kts
Range 12,000nm at 12.00 kts
Bunker at max displacement = 1,986 tons
Complement:
588 - 765
Cost:
£4.174 million / $16.695 million
Distribution of weights at normal displacement:
Armament: 347 tons, 2.8 %
Armour: 2,389 tons, 19.2 %
- Belts: 766 tons, 6.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 507 tons, 4.1 %
- Armour Deck: 1,080 tons, 8.7 %
- Conning Tower: 36 tons, 0.3 %
Machinery: 3,014 tons, 24.2 %
Hull, fittings & equipment: 4,939 tons, 39.7 %
Fuel, ammunition & stores: 1,593 tons, 12.8 %
Miscellaneous weights: 150 tons, 1.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
13,550 lbs / 6,146 Kg = 52.9 x 8.0 " / 203 mm shells or 1.7 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 2.9 ft / 0.9 m
Roll period: 16.1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.65
Seaboat quality (Average = 1.00): 1.15
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.460
Length to Beam Ratio: 8.86 : 1
'Natural speed' for length: 24.19 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 62
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 30.00 ft / 9.14 m
- Forecastle (20 %): 26.00 ft / 7.92 m
- Mid (45 %): 26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break)
- Quarterdeck (20 %): 18.00 ft / 5.49 m
- Stern: 19.00 ft / 5.79 m
- Average freeboard: 22.02 ft / 6.71 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101.9 %
- Above water (accommodation/working, high = better): 147.1 %
Waterplane Area: 24,834 Square feet or 2,307 Square metres
Displacement factor (Displacement / loading): 110 %
Structure weight / hull surface area: 119 lbs/sq ft or 582 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.85
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
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MS-26 class, Atlantean Mine warfare vessel laid down 1929
Displacement:
674 t light; 694 t standard; 782 t normal; 853 t full load
Dimensions: Length overall / water x beam x draught
229.73 ft / 227.00 ft x 26.00 ft x 8.00 ft (normal load)
70.02 m / 69.19 m x 7.92 m x 2.44 m
Armament:
2 - 3.00" / 76.2 mm guns (1x2 guns), 13.50lbs / 6.12kg shells, 1929 Model
Dual purpose guns in deck mount
on centreline forward
2 - 1.57" / 39.9 mm guns (1x2 guns), 1.93lbs / 0.88kg shells, 1929 Model
Anti-aircraft guns in deck mount
on centreline aft
2 - 1.00" / 25.4 mm guns (1x2 guns), 0.50lbs / 0.23kg shells, 1929 Model
Anti-aircraft guns in deck mount
on centreline forward, all raised guns - superfiring
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1929 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 32 lbs / 15 kg
Shells per gun, main battery: 220
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm - -
2nd: 0.79" / 20 mm - -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 1,912 shp / 1,426 Kw = 16.50 kts
Range 5,000nm at 12.00 kts
Bunker at max displacement = 159 tons
Complement:
73 - 96
Cost:
£0.141 million / $0.563 million
Distribution of weights at normal displacement:
Armament: 4 tons, 0.5 %
Armour: 5 tons, 0.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 5 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 59 tons, 7.5 %
Hull, fittings & equipment: 427 tons, 54.6 %
Fuel, ammunition & stores: 108 tons, 13.8 %
Miscellaneous weights: 180 tons, 23.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,661 lbs / 753 Kg = 123.0 x 3.0 " / 76 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 0.7 ft / 0.2 m
Roll period: 13.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.06
Seaboat quality (Average = 1.00): 1.34
Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.580
Length to Beam Ratio: 8.73 : 1
'Natural speed' for length: 15.07 kts
Power going to wave formation at top speed: 48 %
Trim (Max stability = 0, Max steadiness = 100): 52
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 10.20 ft / 3.11 m
- Forecastle (20 %): 10.00 ft / 3.05 m
- Mid (50 %): 8.00 ft / 2.44 m
- Quarterdeck (15 %): 6.00 ft / 1.83 m (8.00 ft / 2.44 m before break)
- Stern: 6.00 ft / 1.83 m
- Average freeboard: 8.42 ft / 2.57 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 54.6 %
- Above water (accommodation/working, high = better): 93.5 %
Waterplane Area: 4,237 Square feet or 394 Square metres
Displacement factor (Displacement / loading): 234 %
Structure weight / hull surface area: 66 lbs/sq ft or 321 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.82
- Longitudinal: 2.43
- Overall: 1.87
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
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A variety of light vessels are being produced by Atlantis. The Type 1 class CMB is already in production while the MTB-1 class vessels will be built later this year. The Type 1 motor launch is also a new design that will begin production this year, in addition a minelayer version has been designed.
Type 1 class Coastal Motor Boat
(Based on British type 3 C.M.B.)
CMB-1 through 121 (1928/29/30)
Demensions 55x11x3
displacement:15 tons
Armament 1x20mm forward, 2x0.50 cal mg aft of
bridge, 2x18"TT, 4 D.C.
Machinery 2x 500 hp Roth petrol motor
speed 35 knots
Designed to operate primarily in the Taurian Sea, Caribbean and Sea of Marmara
MTB-1 through 61 (1929)
Demensions: 70x19x5
displacement: 35 tons
Armament: 2x20mm, 2x0.50 cal mg, 4x18"TT, 6 D.C.
Machinery: Batch 1, 6 ships, 3x 1200 hp Packard petrol motors
Batch 2, 6 ships, 3x 1200 hp Roth petrol motors
Speed: 40/41 knots
Type 1 Motor launch
Demensions 110x17.5x4.6
displacement:60 tons
Armament 1x40mm forward, 2x20mm 4x0.50 cal mg, 12 D.C.
Machinery 4x 500 hp Roth petrol motor
speed 25 knots
Type 1 Motor launch, mine layer version
Demensions 110x17.5x4.6
displacement:68 tons
Armament 1x40mm forward, 2x20mm 2x0.50 cal mg, 6 mines
Machinery 4x 500 hp Roth petrol motor
speed 24 knots