Hector, Atlantis Heavy Cruiser laid down 1928
Hector/Apollo, Atlantean Heavy cruiser laid down 1928 (Engine 1942)
Displacement:
10,968 t light; 11,459 t standard; 12,432 t normal; 13,211 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
12 - 3.95" / 100 mm guns (6x2 guns), 30.81lbs / 13.98kg shells, 1942 Model
Dual purpose guns in deck mounts
on side, evenly spread, 4 raised mounts
2 - 3.95" / 100 mm guns (1x2 guns), 30.81lbs / 13.98kg shells, 1942 Model
Dual purpose guns in deck mount
on centreline aft, all raised guns - superfiring
16 - 1.57" / 40.0 mm guns (4x4 guns), 1.95lbs / 0.88kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
18 - 0.79" / 20.0 mm guns (6x3 guns), 0.24lbs / 0.11kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 2,771 lbs / 1,257 kg
Shells per gun, main battery: 150
10 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 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: 5.51" / 140 mm 3.94" / 100 mm 3.94" / 100 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm -
3rd: 2.00" / 51 mm 1.00" / 25 mm -
4th: 1.00" / 25 mm - -
- Armour deck: 2.36" / 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 = 1,752 tons
Complement:
588 - 765
Cost:
£3.928 million / $15.713 million
Distribution of weights at normal displacement:
Armament: 346 tons, 2.8 %
Armour: 2,429 tons, 19.5 %
- Belts: 770 tons, 6.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 538 tons, 4.3 %
- Armour Deck: 1,085 tons, 8.7 %
- Conning Tower: 36 tons, 0.3 %
Machinery: 2,529 tons, 20.3 %
Hull, fittings & equipment: 5,414 tons, 43.5 %
Fuel, ammunition & stores: 1,464 tons, 11.8 %
Miscellaneous weights: 250 tons, 2.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
15,251 lbs / 6,918 Kg = 59.6 x 8.0 " / 203 mm shells or 1.9 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 2.7 ft / 0.8 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.66
Seaboat quality (Average = 1.00): 1.13
Hull form characteristics:
Hull has raised forecastle, 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 %): 26.20 ft / 7.99 m (26.00 ft / 7.92 m aft of break)
- Mid (45 %): 26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break)
- Quarterdeck (15 %): 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): 90.2 %
- Above water (accommodation/working, high = better): 139.3 %
Waterplane Area: 24,834 Square feet or 2,307 Square metres
Displacement factor (Displacement / loading): 118 %
Structure weight / hull surface area: 131 lbs/sq ft or 638 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.02
- Longitudinal: 2.06
- Overall: 1.10
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
Superstructure modified/replaced, Hangars added, new machinery, new secondary and light AA weapons added, new torpedo launchers added and torpedo outfit increased to 10 (2x5)
Misc weight breakdown
50 tons for 2 aircraft
50 tons for cross deck catipult
50 tons for 2x25ton cranes
60 tons for radars
20 tons for torpedo reloads
20 tons for improved gun directors
As built
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
8 - 1.57" / 40 mm guns (4x2 guns), 1.93lbs / 0.88kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
18 - 0.79" / 20 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):
13,563 lbs / 6,152 Kg = 53.0 x 8.0 " / 203 mm shells or 1.7 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 3.0 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