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Quoted

Drazki (DD39-A), Bulgarian Heavy Destroyer laid down 1939

Displacement:
2,175 t light; 2,263 t standard; 2,507 t normal; 2,703 t full load

Dimensions: Length overall / water x beam x draught
381.43 ft / 375.00 ft x 40.00 ft x 15.00 ft (normal load)
116.26 m / 114.30 m x 12.19 m x 4.57 m

Armament:
5 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority aft, 3 raised mounts - superfiring
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
16 - 0.79" / 20.0 mm guns (1x16 guns), 0.24lbs / 0.11kg shells, 1939 Model
Machine guns in deck mount
on side
Weight of broadside 329 lbs / 149 kg
Shells per gun, main battery: 200
8 - 23.6" / 599.44 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.59" / 15 mm 0.59" / 15 mm
2nd: 0.39" / 10 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -

- Armour deck: 0.79" / 20 mm, Conning tower: 0.98" / 25 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 44,765 shp / 33,395 Kw = 34.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 440 tons

Complement:
176 - 230

Cost:
£1.537 million / $6.146 million

Distribution of weights at normal displacement:
Armament: 41 tons, 1.6 %
Armour: 162 tons, 6.4 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 19 tons, 0.8 %
- Armour Deck: 139 tons, 5.5 %
- Conning Tower: 4 tons, 0.2 %
Machinery: 1,096 tons, 43.7 %
Hull, fittings & equipment: 726 tons, 28.9 %
Fuel, ammunition & stores: 333 tons, 13.3 %
Miscellaneous weights: 150 tons, 6.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
813 lbs / 369 Kg = 13.0 x 5.0 " / 127 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.5 ft / 0.5 m
Roll period: 13.6 seconds
Steadiness - As gun platform (Average = 50 %): 74 %
- Recoil effect (Restricted arc if above 1.00): 0.50
Seaboat quality (Average = 1.00): 1.12

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.390
Length to Beam Ratio: 9.38 : 1
'Natural speed' for length: 22.56 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 66
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: 24.00 ft / 7.32 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (50 %): 20.00 ft / 6.10 m (14.50 ft / 4.42 m aft of break)
- Quarterdeck (15 %): 14.50 ft / 4.42 m
- Stern: 14.50 ft / 4.42 m
- Average freeboard: 17.57 ft / 5.36 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 160.8 %
- Above water (accommodation/working, high = better): 94.2 %
Waterplane Area: 9,531 Square feet or 885 Square metres
Displacement factor (Displacement / loading): 82 %
Structure weight / hull surface area: 38 lbs/sq ft or 188 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.48
- Longitudinal: 2.32
- Overall: 0.56
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform

Quoted

Drazki (DD39-B), Bulgarian Heavy Destroyer laid down 1939

Displacement:
2,151 t light; 2,240 t standard; 2,500 t normal; 2,708 t full load

Dimensions: Length overall / water x beam x draught
381.43 ft / 375.00 ft x 40.00 ft x 15.00 ft (normal load)
116.26 m / 114.30 m x 12.19 m x 4.57 m

Armament:
5 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority aft, 3 raised mounts - superfiring
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
16 - 0.79" / 20.0 mm guns (1x16 guns), 0.24lbs / 0.11kg shells, 1939 Model
Machine guns in deck mount
on side
Weight of broadside 329 lbs / 149 kg
Shells per gun, main battery: 200
8 - 23.6" / 599.44 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.59" / 15 mm 0.59" / 15 mm
2nd: 0.39" / 10 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -

- Conning tower: 0.98" / 25 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 54,167 shp / 40,408 Kw = 34.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 469 tons

Complement:
176 - 229

Cost:
£1.658 million / $6.631 million

Distribution of weights at normal displacement:
Armament: 41 tons, 1.6 %
Armour: 23 tons, 0.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 19 tons, 0.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 4 tons, 0.2 %
Machinery: 1,251 tons, 50.0 %
Hull, fittings & equipment: 687 tons, 27.5 %
Fuel, ammunition & stores: 349 tons, 13.9 %
Miscellaneous weights: 150 tons, 6.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
595 lbs / 270 Kg = 9.5 x 5.0 " / 127 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 1.7 ft / 0.5 m
Roll period: 13.0 seconds
Steadiness - As gun platform (Average = 50 %): 75 %
- Recoil effect (Restricted arc if above 1.00): 0.48
Seaboat quality (Average = 1.00): 1.13

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.389
Length to Beam Ratio: 9.38 : 1
'Natural speed' for length: 19.36 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 66
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: 24.00 ft / 7.32 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (50 %): 20.00 ft / 6.10 m (14.50 ft / 4.42 m aft of break)
- Quarterdeck (15 %): 14.50 ft / 4.42 m
- Stern: 14.50 ft / 4.42 m
- Average freeboard: 17.57 ft / 5.36 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 181.0 %
- Above water (accommodation/working, high = better): 90.7 %
Waterplane Area: 9,180 Square feet or 853 Square metres
Displacement factor (Displacement / loading): 73 %
Structure weight / hull surface area: 37 lbs/sq ft or 179 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.44
- Longitudinal: 2.18
- Overall: 0.52
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform

Quoted

Drazki (DD39-A), Bulgarian Heavy Destroyer laid down 1939

Displacement:
2,264 t light; 2,354 t standard; 2,604 t normal; 2,803 t full load

Dimensions: Length overall / water x beam x draught
381.43 ft / 375.00 ft x 40.50 ft x 15.00 ft (normal load)
116.26 m / 114.30 m x 12.34 m x 4.57 m

Armament:
5 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority aft, 3 raised mounts - superfiring
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
16 - 0.79" / 20.0 mm guns (1x16 guns), 0.24lbs / 0.11kg shells, 1939 Model
Machine guns in deck mount
on side
Weight of broadside 329 lbs / 149 kg
Shells per gun, main battery: 200
8 - 23.6" / 599.44 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.59" / 15 mm 0.59" / 15 mm
2nd: 0.39" / 10 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -

- Armour deck: 0.79" / 20 mm, Conning tower: 0.98" / 25 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 46,205 shp / 34,469 Kw = 34.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 449 tons

Complement:
181 - 236

Cost:
£1.592 million / $6.369 million

Distribution of weights at normal displacement:
Armament: 41 tons, 1.6 %
Armour: 164 tons, 6.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 19 tons, 0.7 %
- Armour Deck: 141 tons, 5.4 %
- Conning Tower: 4 tons, 0.2 %
Machinery: 1,142 tons, 43.9 %
Hull, fittings & equipment: 766 tons, 29.4 %
Fuel, ammunition & stores: 340 tons, 13.0 %
Miscellaneous weights: 150 tons, 5.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
878 lbs / 398 Kg = 14.0 x 5.0 " / 127 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 1.6 ft / 0.5 m
Roll period: 13.5 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.46
Seaboat quality (Average = 1.00): 1.07

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 9.26 : 1
'Natural speed' for length: 22.55 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 66
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: 24.00 ft / 7.32 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (50 %): 20.00 ft / 6.10 m (14.50 ft / 4.42 m aft of break)
- Quarterdeck (15 %): 14.50 ft / 4.42 m
- Stern: 14.50 ft / 4.42 m
- Average freeboard: 17.57 ft / 5.36 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 160.6 %
- Above water (accommodation/working, high = better): 94.2 %
Waterplane Area: 9,702 Square feet or 901 Square metres
Displacement factor (Displacement / loading): 83 %
Structure weight / hull surface area: 40 lbs/sq ft or 197 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.33
- Overall: 0.59
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform

Quoted

Originally posted by Kaiser Kirk
Overall it seems good. I don't see any major flaws, except I worry that the feed mechanism on the 20mm mount may be overly complex and prone to breakage, plus the train rate may not be good. Why not simple have them in single and twin mounts?

Deck armor- OTL, occurred in some American designs as an anti-strafing element, but they only used 1/2" and had some side armor to complement it. I get stuck thinking 'citadel', it bugs me that you have critical elements above the waterline, so the armor deck above those, but are vulnerable to side shots between waterline and deck.

Also, are Bulgarian sailors particularly short? I ask because the raised forcastle is only 5.5 feet above the next deck, and there would be pipes and support elements and all.

Quoted

Drazki (DD39-A), Bulgarian Heavy Destroyer laid down 1939

Displacement:
2,294 t light; 2,385 t standard; 2,636 t normal; 2,837 t full load

Dimensions: Length overall / water x beam x draught
381.43 ft / 375.00 ft x 41.00 ft x 15.00 ft (normal load)
116.26 m / 114.30 m x 12.50 m x 4.57 m

Armament:
5 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority aft, 3 raised mounts - superfiring
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
16 - 0.79" / 20.0 mm guns (8x2 guns), 0.24lbs / 0.11kg shells, 1939 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 329 lbs / 149 kg
Shells per gun, main battery: 200
8 - 23.6" / 599.44 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0.51" / 13 mm 243.77 ft / 74.30 m 7.64 ft / 2.33 m
Ends: Unarmoured
Main Belt covers 100 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.59" / 15 mm 0.59" / 15 mm
2nd: 0.39" / 10 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -

- Armour deck: 0.51" / 13 mm, Conning tower: 0.79" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 46,577 shp / 34,746 Kw = 34.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 452 tons

Complement:
183 - 239

Cost:
£1.614 million / $6.455 million

Distribution of weights at normal displacement:
Armament: 41 tons, 1.6 %
Armour: 155 tons, 5.9 %
- Belts: 40 tons, 1.5 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 19 tons, 0.7 %
- Armour Deck: 93 tons, 3.5 %
- Conning Tower: 3 tons, 0.1 %
Machinery: 1,161 tons, 44.1 %
Hull, fittings & equipment: 806 tons, 30.6 %
Fuel, ammunition & stores: 342 tons, 13.0 %
Miscellaneous weights: 130 tons, 4.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
954 lbs / 433 Kg = 15.3 x 5.0 " / 127 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 1.7 ft / 0.5 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 69 %
- Recoil effect (Restricted arc if above 1.00): 0.43
Seaboat quality (Average = 1.00): 1.14

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 9.15 : 1
'Natural speed' for length: 22.57 kts
Power going to wave formation at top speed: 68 %
Trim (Max stability = 0, Max steadiness = 100): 60
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: 24.00 ft / 7.32 m
- Forecastle (20 %): 22.00 ft / 6.71 m
- Mid (50 %): 22.00 ft / 6.71 m (14.50 ft / 4.42 m aft of break)
- Quarterdeck (15 %): 14.50 ft / 4.42 m
- Stern: 14.50 ft / 4.42 m
- Average freeboard: 18.41 ft / 5.61 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 160.1 %
- Above water (accommodation/working, high = better): 100.5 %
Waterplane Area: 9,822 Square feet or 912 Square metres
Displacement factor (Displacement / loading): 84 %
Structure weight / hull surface area: 41 lbs/sq ft or 200 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.68
- Overall: 0.59
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate