WesWorld

Admiralty "S" Class Destroyers (Reffited 1931)

30 in service



Before reffit:

Dimensions 265 (p.p.) 275-277 (o.a.) x 26.66 x 9 feet(mean) draught. 1075 tons
Guns: 3-4 inch (Mk. IV with 30° elevation), 1-2 pdr. pom-pom. Tubes, 4-21 inch in pairs.
Machinery : Turbines (all-geared type). Brown Curtis (A.G.) in all except following:-Palmer boats, Parson. (A.G.) ; Tilbury, Tintagel, Parsons (A.G.). Designed S.H.P. 27,000 = 36 kts. 2 screws. Yarrow boilers in all, except White boats with White-Forster. Oil: about :300/250 tons.
Complement, 90.

From: Jane's Fighting Ships for 1919


After reffit:

Admirality "S" class , Australia Destroyer laid down 1919 (Engine 1931)

Displacement:
1,056 t light; 1,105 t standard; 1,289 t normal; 1,436 t full load

Dimensions: Length overall / water x beam x draught
320.00 ft / 320.00 ft x 30.00 ft x 10.00 ft (normal load)
97.54 m / 97.54 m x 9.14 m x 3.05 m

Armament:
3 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.91kg shells, 1931 Model
Quick firing guns in deck mounts
on centreline, evenly spread
Aft Main mounts separated by engine room
2 - 1.57" / 40.0 mm guns (1x2 guns), 1.95lbs / 0.88kg shells, 1931 Model
Anti-aircraft guns in deck mount
on centreline amidships
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1919 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 164 lbs / 74 kg
Shells per gun, main battery: 250
8 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.20" / 30 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 27,881 shp / 20,799 Kw = 32.50 kts
Range 5,200nm at 15.00 kts
Bunker at max displacement = 331 tons

Complement:
106 - 139

Cost:
£0.312 million / $1.249 million

Distribution of weights at normal displacement:
Armament: 21 tons, 1.6 %
Armour: 9 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 9 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 635 tons, 49.2 %
Hull, fittings & equipment: 371 tons, 28.8 %
Fuel, ammunition & stores: 233 tons, 18.1 %
Miscellaneous weights: 20 tons, 1.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
404 lbs / 183 Kg = 7.7 x 4.7 " / 120 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.26
Metacentric height 1.3 ft / 0.4 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.21
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.470
Length to Beam Ratio: 10.67 : 1
'Natural speed' for length: 20.39 kts
Power going to wave formation at top speed: 69 %
Trim (Max stability = 0, Max steadiness = 100): 69
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: 24.00 ft / 7.32 m
- Forecastle (20 %): 15.00 ft / 4.57 m
- Mid (50 %): 15.00 ft / 4.57 m (12.00 ft / 3.66 m aft of break)
- Quarterdeck (15 %): 12.00 ft / 3.66 m
- Stern: 12.00 ft / 3.66 m
- Average freeboard: 14.22 ft / 4.33 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 173.7 %
- Above water (accommodation/working, high = better): 66.3 %
Waterplane Area: 6,472 Square feet or 601 Square metres
Displacement factor (Displacement / loading): 69 %
Structure weight / hull surface area: 28 lbs/sq ft or 138 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.10
- Overall: 0.58
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform

Thorneycroft "V" Class Destroyers

Sent back to mother England

Thorneycroft " R " Class Destroyers

Sold to Phillipines

DD Aclarity class
HMAS Aclarity
HMAS Audacity
HMAS Adventure
HMAS Advantage
HMAS Ambush

DD Dauntless class
HMAS Dauntless
HMAS Devastor
HMAS Defence
HMAS Defiance
HMAS Desperate

DD Firefly class
HMAS Firefly
HMAS Falcon
HMAS Flanker
HMAS Firefox
HMAS Flamingo



Changed main armament arangement, and AA

HMAS Aclarity, Australia Destroyer laid down 1928

Displacement:
1,547 t light; 1,625 t standard; 1,895 t normal; 2,111 t full load

Dimensions: Length overall / water x beam x draught
371.92 ft / 370.00 ft x 35.00 ft x 12.90 ft (normal load)
113.36 m / 112.78 m x 10.67 m x 3.93 m

Armament:
4 - 4.72" / 120 mm guns in single mounts, 52.58lbs / 23.85kg shells, 1928 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
1 - 4.72" / 120 mm guns in single mounts, 52.58lbs / 23.85kg shells, 1928 Model
Dual purpose gun in a deck mount with hoist
on centreline amidships
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.89kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
10 - 0.79" / 20.0 mm guns (5x2 guns), 0.24lbs / 0.11kg shells, 1928 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 273 lbs / 124 kg
Shells per gun, main battery: 250
8 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.20" / 30 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 33,454 shp / 24,957 Kw = 33.00 kts
Range 5,900nm at 15.00 kts
Bunker at max displacement = 485 tons

Complement:
143 - 186

Cost:
£0.798 million / $3.193 million

Distribution of weights at normal displacement:
Armament: 34 tons, 1.8 %
Armour: 13 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 13 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 902 tons, 47.6 %
Hull, fittings & equipment: 578 tons, 30.5 %
Fuel, ammunition & stores: 348 tons, 18.4 %
Miscellaneous weights: 20 tons, 1.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
586 lbs / 266 Kg = 11.1 x 4.7 " / 120 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.32
Metacentric height 1.7 ft / 0.5 m
Roll period: 11.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.44
Seaboat quality (Average = 1.00): 1.25

Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0.397
Length to Beam Ratio: 10.57 : 1
'Natural speed' for length: 22.16 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 5.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.90 ft / 6.68 m
- Forecastle (30 %): 19.00 ft / 5.79 m (14.00 ft / 4.27 m aft of break)
- Mid (50 %): 14.00 ft / 4.27 m
- Quarterdeck (15 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 15.85 ft / 4.83 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 169.7 %
- Above water (accommodation/working, high = better): 88.4 %
Waterplane Area: 8,259 Square feet or 767 Square metres
Displacement factor (Displacement / loading): 79 %
Structure weight / hull surface area: 35 lbs/sq ft or 169 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.49
- Longitudinal: 2.04
- Overall: 0.57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Thornycroft class
HMAS Shakespeare
HMAS Spencer
HMAS Stuart

Admirality class
HMAS Scott
HMAS Bruce
HMAS Campbell
HMAS Wallace
HMAS Mackay
HMAS Malcom
HMAS Montrose



HMAS Spencer (Thorncraft type), Australia Destroyer laid down 1917 (Rebuilt 1930)

Displacement:
1,568 t light; 1,644 t standard; 1,887 t normal; 2,081 t full load

Dimensions: Length overall / water x beam x draught
322.10 ft / 320.00 ft x 31.75 ft x 13.00 ft (normal load)
98.18 m / 97.54 m x 9.68 m x 3.96 m

Armament:
5 - 4.72" / 120 mm guns in single mounts, 52.58lbs / 23.85kg shells, 1930 Model
Dual purpose guns in deck mounts
on centreline, evenly spread, 2 raised mounts
4 - 1.57" / 40.0 mm guns (1x4 guns), 1.95lbs / 0.88kg shells, 1930 Model
Anti-aircraft guns in deck mount
on centreline amidships
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1930 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 273 lbs / 124 kg
Shells per gun, main battery: 250
8 - 21.0" / 533.4 mm above water torpedoes

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 43,532 shp / 32,475 Kw = 32.50 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 436 tons

Complement:
143 - 186

Cost:
£0.408 million / $1.630 million

Distribution of weights at normal displacement:
Armament: 34 tons, 1.8 %
Machinery: 1,005 tons, 53.3 %
Hull, fittings & equipment: 519 tons, 27.5 %
Fuel, ammunition & stores: 319 tons, 16.9 %
Miscellaneous weights: 10 tons, 0.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
449 lbs / 203 Kg = 8.5 x 4.7 " / 120 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.26
Metacentric height 1.4 ft / 0.4 m
Roll period: 11.4 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.31
Seaboat quality (Average = 1.00): 1.16

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.500
Length to Beam Ratio: 10.08 : 1
'Natural speed' for length: 17.89 kts
Power going to wave formation at top speed: 71 %
Trim (Max stability = 0, Max steadiness = 100): 61
Bow angle (Positive = bow angles forward): 5.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.00 ft / 7.32 m
- Forecastle (30 %): 24.00 ft / 7.32 m (14.00 ft / 4.27 m aft of break)
- Mid (50 %): 14.00 ft / 4.27 m
- Quarterdeck (15 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 17.00 ft / 5.18 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 187.2 %
- Above water (accommodation/working, high = better): 57.7 %
Waterplane Area: 6,769 Square feet or 629 Square metres
Displacement factor (Displacement / loading): 65 %
Structure weight / hull surface area: 32 lbs/sq ft or 156 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 3.68
- Overall: 0.61
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform

U Class

U Class, Australian (ex-Royal Navy) Destroyer laid down 1925 refit 1938

Displacement:
1,375 t light; 1,428 t standard; 1,580 t normal; 1,702 t full load

Dimensions: Length overall / water x beam x draught
368.37 ft / 360.00 ft x 32.00 ft x 12.00 ft (normal load)
112.28 m / 109.73 m x 9.75 m x 3.66 m

Armament:
4 - 4.70" / 119 mm guns in single mounts, 62.00lbs / 28.12kg shells, 1925 Model
Quick firing guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
2 - 1.57" / 40.0 mm guns (1x2 guns), 2.00lbs / 0.91kg shells, 1925 Model
Anti-aircraft guns in deck mount
on centreline amidships, all raised guns - superfiring
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1925 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 253 lbs / 115 kg
Shells per gun, main battery: 150
6 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.50" / 13 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 37,990 shp / 28,341 Kw = 33.50 kts
Range 5,500nm at 12.00 kts
Bunker at max displacement = 274 tons

Complement:
124 - 162

Cost:
£0.622 million / $2.489 million

Distribution of weights at normal displacement:
Armament: 27 tons, 1.7 %
Armour: 5 tons, 0.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 5 tons, 0.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 855 tons, 54.1 %
Hull, fittings & equipment: 473 tons, 29.9 %
Fuel, ammunition & stores: 205 tons, 13.0 %
Miscellaneous weights: 15 tons, 0.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
364 lbs / 165 Kg = 7.0 x 4.7 " / 119 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.34
Metacentric height 1.5 ft / 0.5 m
Roll period: 10.9 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.46
Seaboat quality (Average = 1.00): 1.02

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.400
Length to Beam Ratio: 11.25 : 1
'Natural speed' for length: 18.97 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 59
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: 23.00 ft / 7.01 m
- Forecastle (20 %): 21.00 ft / 6.40 m
- Mid (32 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 11.00 ft / 3.35 m
- Average freeboard: 13.70 ft / 4.17 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 188.7 %
- Above water (accommodation/working, high = better): 83.4 %
Waterplane Area: 7,091 Square feet or 659 Square metres
Displacement factor (Displacement / loading): 59 %
Structure weight / hull surface area: 33 lbs/sq ft or 163 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.57
- Overall: 0.56
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped

Refit Notes
In Q2/38 these destroyers received two sextuple .661in HMG mounts in lieu of the single 20mm and upgraded 24.5in torpedo tubes.