During 1928-1929 this class of DDs will be launched,
A total of 12 units will be built.
An evolution of the previous 1st class DDs of the Z45 class, this second class destroyers have slightly smaller dimensions and displace 1600 tons standard, yet they carry more weapons and are, in general, more capable than the previous, larger, class.
This destroyers carry 5 125mm DP guns and 8 21'' torpedoes. They are also capable ASW assets with 50 tons of miscelaneous weight invested on depth charges.
This class will replace the ageing Z25 class of destroyers, which will be rebuilt as pure ASW assets.
Z53, Dutch Destroyer laid down 1928
Displacement:
1.525 t light; 1.600 t standard; 1.804 t normal; 1.968 t full load
Dimensions: Length overall / water x beam x draught
379,91 ft / 374,02 ft x 32,81 ft x 13,62 ft (normal load)
115,80 m / 114,00 m x 10,00 m x 4,15 m
Armament:
4 - 4,92" / 125 mm guns in single mounts, 59,52lbs / 27,00kg shells, 1926 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread, 2 raised mounts - superfiring
1 - 4,92" / 125 mm guns in single mounts, 59,52lbs / 27,00kg shells, 1926 Model
Dual purpose gun in deck mount
on centreline amidships
6 - 1,57" / 40,0 mm guns (3x2 guns), 1,95lbs / 0,88kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, all amidships
6 - 0,79" / 20,0 mm guns (3x2 guns), 0,24lbs / 0,11kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 311 lbs / 141 kg
Shells per gun, main battery: 210
8 - 21,0" / 533,4 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0,79" / 20 mm 0,39" / 10 mm -
2nd: 0,39" / 10 mm - -
3rd: 0,39" / 10 mm - -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 40.512 shp / 30.222 Kw = 35,00 kts
Range 4.500nm at 15,00 kts
Bunker at max displacement = 368 tons
Complement:
137 - 179
Cost:
£0,827 million / $3,308 million
Distribution of weights at normal displacement:
Armament: 39 tons, 2,2 %
Armour: 10 tons, 0,5 %
- Belts: 0 tons, 0,0 %
- Torpedo bulkhead: 0 tons, 0,0 %
- Armament: 10 tons, 0,5 %
- Armour Deck: 0 tons, 0,0 %
- Conning Tower: 0 tons, 0,0 %
Machinery: 933 tons, 51,7 %
Hull, fittings & equipment: 494 tons, 27,4 %
Fuel, ammunition & stores: 279 tons, 15,5 %
Miscellaneous weights: 50 tons, 2,8 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
423 lbs / 192 Kg = 7,1 x 4,9 " / 125 mm shells or 0,3 torpedoes
Stability (Unstable if below 1.00): 1,30
Metacentric height 1,5 ft / 0,5 m
Roll period: 11,2 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0,29
Seaboat quality (Average = 1.00): 1,03
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0,378
Length to Beam Ratio: 11,40 : 1
'Natural speed' for length: 22,21 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 10,00 degrees
Stern overhang: 1,64 ft / 0,50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24,11 ft / 7,35 m
- Forecastle (20 %): 18,04 ft / 5,50 m
- Mid (45 %): 18,04 ft / 5,50 m (9,51 ft / 2,90 m aft of break)
- Quarterdeck (15 %): 9,51 ft / 2,90 m
- Stern: 9,51 ft / 2,90 m
- Average freeboard: 13,84 ft / 4,22 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 187,0 %
- Above water (accommodation/working, high = better): 76,0 %
Waterplane Area: 7.757 Square feet or 721 Square metres
Displacement factor (Displacement / loading): 62 %
Structure weight / hull surface area: 32 lbs/sq ft or 158 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,50
- Longitudinal: 1,59
- Overall: 0,56
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