8 Doxa class, bought 1943
4 Imp Doxa class, bought 1943
5 Makriyannis class, bought 1943
D-21 Doxa as completed 1922.
A new design, derived from the Kanaris class Destroyers which were based on the V&W class RN destroyers. All vessels were built locally with some assistance from Thornycroft. Guns were from US sources.
RHN D-21 Doxa Class, Greek Destroyer laid down 1921
Displacement:
1,345 t light; 1,396 t standard; 1,447 t normal; 1,482 t full load
Loading submergence 168 tons/feet
Dimensions:
320.00 ft x 31.00 ft x 11.10 ft (normal load)
97.54 m x 9.45 m x 3.38 m
Armament:
4 - 5.00" / 127 mm guns
1 - 3.00" / 76 mm guns
4 - 0.50" / 13 mm AA guns
Weight of broadside 264 lbs / 120 kg
6 - 21.0" / 533.4 mm above water torpedoes
Armour:
Belt 1.00" / 25 mm, ends unarmoured
Belts cover 80 % of normal area
Main belt does not fully protect magazines and engineering spaces
Main gun shields 0.70" / 18 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 43,457 shp / 32,419 Kw = 34.00 kts
Range 1,300nm at 14.00 kts
Complement:
117 - 152
Cost:
£0.487 million / $1.947 million
Distribution of weights at normal displacement:
Armament: 33 tons, 2.3 %
Armour: 50 tons, 3.5 %
Belts: 45 tons, 3.1 %, Armament: 5 tons, 0.3 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 832 tons, 57.5 %
Hull, fittings & equipment: 430 tons, 29.7 %
Fuel, ammunition & stores: 102 tons, 7.1 %
Miscellaneous weights: 0 tons, 0.0 %
Metacentric height 1.1
Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is extremely poor
Room for accommodation & workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.16
Shellfire needed to sink: 306 lbs / 139 Kg = 4.9 x 5.0 " / 127 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.2
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.40
Relative quality as seaboat: 1.00
Hull form characteristics:
Block coefficient: 0.460
Sharpness coefficient: 0.31
Hull speed coefficient 'M': 8.65
'Natural speed' for length: 17.89 kts
Power going to wave formation at top speed: 71 %
Trim: 70
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 202.7 %
Relative accommodation and working space: 89.6 %
(Average = 100%)
Displacement factor: 44 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.50
(Structure weight / hull surface area: 36 lbs / square foot or 176 Kg / square metre)
Relative longitudinal hull strength: 1.64
(for 16.00 ft / 4.88 m average freeboard, freeboard adjustment 5.71 ft)
Relative composite hull strength: 0.56
D-29 Kondouriotis as completed 1926.
The Kondouroitis class were fitted with a new design of torpedo tubes and larger gun shields.
RHN D-29 Kondouriotis Class, Greek Destroyer laid down 1925
Displacement:
1,365 t light; 1,410 t standard; 1,463 t normal; 1,506 t full load
Dimensions: Length overall / water x beam x draught
324.99 ft / 320.00 ft x 31.00 ft x 11.10 ft (normal load)
99.06 m / 97.54 m x 9.45 m x 3.38 m
Armament:
4 - 5.00" / 127 mm guns in single mounts, 59.90lbs / 27.17kg shells, 1925 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread, 2 raised mounts - superfiring
1 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1925 Model
Anti-aircraft gun in deck mount
on centreline amidships, 1 raised gun
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1925 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 274 lbs / 124 kg
Shells per gun, main battery: 100
6 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0.75" / 19 mm 220.00 ft / 67.06 m 8.00 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 106 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.75" / 19 mm - -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 43,847 shp / 32,710 Kw = 34.00 kts
Range 1,300nm at 14.00 kts
Bunker at max displacement = 96 tons
Complement:
117 - 153
Cost:
£0.625 million / $2.501 million
Distribution of weights at normal displacement:
Armament: 35 tons, 2.4 %
Armour: 63 tons, 4.3 %
- Belts: 54 tons, 3.7 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 8 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 811 tons, 55.4 %
Hull, fittings & equipment: 406 tons, 27.7 %
Fuel, ammunition & stores: 98 tons, 6.7 %
Miscellaneous weights: 50 tons, 3.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
307 lbs / 139 Kg = 4.9 x 5.0 " / 127 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.26
Metacentric height 1.3 ft / 0.4 m
Roll period: 11.3 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.31
Seaboat quality (Average = 1.00): 0.75
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.465
Length to Beam Ratio: 10.32 : 1
'Natural speed' for length: 17.89 kts
Power going to wave formation at top speed: 72 %
Trim (Max stability = 0, Max steadiness = 100): 67
Bow angle (Positive = bow angles forward): 14.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (15 %): 18.00 ft / 5.49 m
- Mid (42 %): 18.00 ft / 5.49 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 13.48 ft / 4.11 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 200.2 %
- Above water (accommodation/working, high = better): 79.6 %
Waterplane Area: 6,408 Square feet or 595 Square metres
Displacement factor (Displacement / loading): 45 %
Structure weight / hull surface area: 32 lbs/sq ft or 157 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.86
- Overall: 0.57
Hull space for machinery, storage, compartmentation is extremely poor
Room for accommodation and workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather
An effort in increase the broadside of Greek destroyers the Kondouriotis design replaced the AA gun with a 5th 5" gun. The result was not felt to be an improvement over the preceeding class and much redevelopment went into the next class of destroyers.
RHN D-33 Makriyannis Class, Greek Destroyer laid down 1927
Displacement:
1,365 t light; 1,411 t standard; 1,463 t normal; 1,505 t full load
Dimensions: Length overall / water x beam x draught
324.99 ft / 320.00 ft x 31.00 ft x 11.10 ft (normal load)
99.06 m / 97.54 m x 9.45 m x 3.38 m
Armament:
5 - 5.00" / 127 mm guns in single mounts, 59.90lbs / 27.17kg shells, 1927 Model
Breech loading guns in deck mounts
on centreline, evenly spread, 3 raised mounts
2 - 1.57" / 40.0 mm guns (1x2 guns), 1.87lbs / 0.85kg shells, 1927 Model
Anti-aircraft guns in deck mount
on centreline aft, all raised guns - superfiring
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.27lbs / 0.12kg shells, 1927 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 305 lbs / 139 kg
Shells per gun, main battery: 95
6 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0.75" / 19 mm 220.00 ft / 67.06 m 8.00 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 106 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.75" / 19 mm - -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 43,847 shp / 32,710 Kw = 34.00 kts
Range 1,300nm at 14.00 kts
Bunker at max displacement = 94 tons
Complement:
117 - 153
Cost:
£0.700 million / $2.801 million
Distribution of weights at normal displacement:
Armament: 40 tons, 2.7 %
Armour: 65 tons, 4.4 %
- Belts: 54 tons, 3.7 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 11 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 795 tons, 54.4 %
Hull, fittings & equipment: 415 tons, 28.4 %
Fuel, ammunition & stores: 98 tons, 6.7 %
Miscellaneous weights: 50 tons, 3.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
313 lbs / 142 Kg = 5.0 x 5.0 " / 127 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.25
Metacentric height 1.3 ft / 0.4 m
Roll period: 11.5 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.35
Seaboat quality (Average = 1.00): 0.74
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.465
Length to Beam Ratio: 10.32 : 1
'Natural speed' for length: 17.89 kts
Power going to wave formation at top speed: 72 %
Trim (Max stability = 0, Max steadiness = 100): 67
Bow angle (Positive = bow angles forward): 14.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (15 %): 18.00 ft / 5.49 m
- Mid (42 %): 18.00 ft / 5.49 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 13.48 ft / 4.11 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 199.0 %
- Above water (accommodation/working, high = better): 79.6 %
Waterplane Area: 6,408 Square feet or 595 Square metres
Displacement factor (Displacement / loading): 46 %
Structure weight / hull surface area: 33 lbs/sq ft or 160 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.89
- Overall: 0.57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather