WesWorld

Tasman class Frigate
- CF Tasman
- CF Bismarck

Tasman class, Australian Frigate laid down 1935


Displacement:
14,000 t light; 14,690 t standard; 16,939 t normal; 18,738 t full load

Dimensions: Length overall / water x beam x draught
706.70 ft / 700.00 ft x 70.00 ft x 25.90 ft (normal load)
215.40 m / 213.36 m x 21.34 m x 7.89 m

Armament:
9 - 9.20" / 234 mm guns (3x3 guns), 510.00lbs / 231.33kg shells, 1935 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
10 - 4.70" / 119 mm guns (5x2 guns), 67.00lbs / 30.39kg shells, 1935 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, 1 raised mount - superfiring
24 - 1.57" / 40.0 mm guns (4x6 guns), 1.95lbs / 0.89kg shells, 1935 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
20 - 0.79" / 20.0 mm guns (10x2 guns), 0.24lbs / 0.11kg shells, 1935 Model
Machine guns in deck mounts
on side, evenly spread, 5 raised mounts
Weight of broadside 5,312 lbs / 2,409 kg
Shells per gun, main battery: 115
6 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7.00" / 178 mm 350.00 ft / 106.68 m 10.00 ft / 3.05 m
Ends: Unarmoured
Main Belt covers 77 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 7.00" / 178 mm 3.00" / 76 mm 7.00" / 178 mm
2nd: 1.00" / 25 mm - -

- Armour deck: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 94,835 shp / 70,747 Kw = 32.00 kts
Range 14,000nm at 15.00 kts
Bunker at max displacement = 4,048 tons

Complement:
742 - 965

Cost:
£6.593 million / $26.372 million

Distribution of weights at normal displacement:
Armament: 509 tons, 3.0 %
Armour: 3,657 tons, 21.6 %
- Belts: 1,063 tons, 6.3 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 766 tons, 4.5 %
- Armour Deck: 1,829 tons, 10.8 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 2,694 tons, 15.9 %
Hull, fittings & equipment: 7,039 tons, 41.6 %
Fuel, ammunition & stores: 2,938 tons, 17.3 %
Miscellaneous weights: 100 tons, 0.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
24,967 lbs / 11,325 Kg = 64.1 x 9.2 " / 234 mm shells or 2.7 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 3.8 ft / 1.1 m
Roll period: 15.2 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.78
Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.467
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 30.31 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 25.00 ft / 7.62 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (50 %): 20.00 ft / 6.10 m
- Quarterdeck (25 %): 20.00 ft / 6.10 m
- Stern: 20.00 ft / 6.10 m
- Average freeboard: 20.40 ft / 6.22 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 76.2 %
- Above water (accommodation/working, high = better): 154.9 %
Waterplane Area: 32,950 Square feet or 3,061 Square metres
Displacement factor (Displacement / loading): 128 %
Structure weight / hull surface area: 137 lbs/sq ft or 668 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
Good seaboat, rides out heavy weather easily