Archer, laid down 1943
Displacement:
5.257 t light; 5.590 t standard; 6.364 t normal; 6.984 t full load
Dimensions: Length overall / water x beam x draught
489,30 ft / 478,35 ft x 47,90 ft x 19,06 ft (normal load)
149,14 m / 145,80 m x 14,60 m x 5,81 m
Armament:
6 - 5,91" / 150 mm guns (2x3 guns), 110,23lbs / 50,00kg shells, 1943 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
2 - 8,2" / 210 mm rockets (2x20 tubes), 1943 Model
Turnable launchers in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
8 - 4,53" / 115 mm guns (4x2 guns), 50,71lbs / 23,00kg shells, 1943 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
12 - 1,57" / 40,0 mm guns (4 mounts), 1,95lbs / 0,88kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 8 raised guns
8 - 0,79" / 20,0 mm guns (4x2 guns), 0,24lbs / 0,11kg shells, 1943 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1.092 lbs / 495 kg (without rockets)
Shells per gun, main battery: 230
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1,38" / 35 mm 347,77 ft / 106,00 m 9,84 ft / 3,00 m
Ends: Unarmoured
Main Belt covers 112% of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3,15" / 80 mm 1,57" / 40 mm 3,15" / 80 mm
2nd: 0,79" / 20 mm 0,79" / 20 mm 1,97" / 50 mm
3rd: 0,98" / 25 mm 0,79" / 20 mm 1,18" / 30 mm
4th: 0,59" / 15 mm - -
5th: 0,39" / 10 mm - -
- Armour deck: 1,18" / 30 mm, Conning tower: 0,79" / 20 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 61.663 shp / 46.000 Kw = 32,15 kts
Range 6.200nm at 18,00 kts
Bunker at max displacement = 1.394 tons
Complement:
356 - 463
Cost:
£3,606 million / $14,422 million
Distribution of weights at normal displacement:
Armament: 171 tons, 2,7%
Armour: 702 tons, 11,0%
- Belts: 193 tons, 3,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 153 tons, 2,4%
- Armour Deck: 350 tons, 5,5%
- Conning Tower: 6 tons, 0,1%
Machinery: 1.593 tons, 25,0%
Hull, fittings & equipment: 2.642 tons, 41,5%
Fuel, ammunition & stores: 1.107 tons, 17,4%
Miscellaneous weights: 150 tons, 2,4%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6.831 lbs / 3.099 Kg = 66,3 x 5,9 " / 150 mm shells or 1,1 torpedoes
Stability (Unstable if below 1.00): 1,11
Metacentric height 2,0 ft / 0,6 m
Roll period: 14,1 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0,81
Seaboat quality (Average = 1.00): 1,00
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0,510
Length to Beam Ratio: 9,99 : 1
'Natural speed' for length: 24,93 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 20,00 degrees
Stern overhang: 1,64 ft / 0,50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25,59 ft / 7,80 m
- Forecastle (20%): 21,82 ft / 6,65 m
- Mid (55%): 21,82 ft / 6,65 m (13,94 ft / 4,25 m aft of break)
- Quarterdeck (15%): 13,94 ft / 4,25 m
- Stern: 13,94 ft / 4,25 m
- Average freeboard: 18,58 ft / 5,66 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 106,3%
- Above water (accommodation/working, high = better): 155,9%
Waterplane Area: 16.025 Square feet or 1.489 Square metres
Displacement factor (Displacement / loading): 118%
Structure weight / hull surface area: 93 lbs/sq ft or 452 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,91
- Longitudinal: 2,25
- Overall: 1,00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
CLX RSAN Archer is an experimental design to test SERPA (seaborne rocket propelled artillery).
Rocket launchers simmed as 18cm guns in single deck mounts with hoists and 80,72kg shells (standard by SS2).
Weight per 18cm gun/mount is 22 tons without armor as per SS2.
Broadside weight modified by taking out both guns.