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This post has been edited 2 times, last edit by "Hrolf Hakonson" (Dec 25th 2009, 8:42pm)
Quoted
[SIZE=3]Bulgarian Minelayer laid down 1939[/SIZE]
Displacement:
2,570 t light; 2,681 t standard; 2,970 t normal; 3,201 t full load
Dimensions: Length overall / water x beam x draught
413.01 ft / 405.00 ft x 40.00 ft x 14.75 ft (normal load)
125.88 m / 123.44 m x 12.19 m x 4.50 m
Armament:
6 - 4.13" / 105 mm guns (3x2 guns), 35.32lbs / 16.02kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward
16 - 1.57" / 40.0 mm guns (4x4 guns), 1.95lbs / 0.88kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 243 lbs / 110 kg
Shells per gun, main battery: 350
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 66,590 shp / 49,676 Kw = 35.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 520 tons
Complement:
200 - 261
Cost:
£1.970 million / $7.881 million
Distribution of weights at normal displacement:
Armament: 30 tons, 1.0 %
Machinery: 1,594 tons, 53.7 %
Hull, fittings & equipment: 776 tons, 26.1 %
Fuel, ammunition & stores: 400 tons, 13.5 %
Miscellaneous weights: 170 tons, 5.7 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
696 lbs / 316 Kg = 19.7 x 4.1 " / 105 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.25
Metacentric height 1.9 ft / 0.6 m
Roll period: 12.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.24
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.435
Length to Beam Ratio: 10.13 : 1
'Natural speed' for length: 20.12 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 69
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: 22.00 ft / 6.71 m
- Forecastle (20 %): 21.00 ft / 6.40 m
- Mid (50 %): 20.00 ft / 6.10 m (13.00 ft / 3.96 m aft of break)
- Quarterdeck (15 %): 13.00 ft / 3.96 m
- Stern: 13.00 ft / 3.96 m
- Average freeboard: 16.93 ft / 5.16 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 188.3 %
- Above water (accommodation/working, high = better): 160.1 %
Waterplane Area: 10,211 Square feet or 949 Square metres
Displacement factor (Displacement / loading): 74 %
Structure weight / hull surface area: 39 lbs/sq ft or 189 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.72
- Overall: 0.57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Breakdown of Miscellaneous Weights:
- 160 tons for 160 FMO-37/950 naval mines
This post has been edited 1 times, last edit by "Rooijen10" (Dec 25th 2009, 9:21pm)
Quoted
Originally posted by Rooijen10
BTW Brock, shouldn't the l:b ratio of that design be 10:1 or less?
Quoted
[SIZE=3]Bulgarian Minelayer laid down 1939[/SIZE]
Displacement:
2,710 t light; 2,824 t standard; 3,122 t normal; 3,360 t full load
Dimensions: Length overall / water x beam x draught
418.17 ft / 410.11 ft x 41.01 ft x 14.76 ft (normal load)
127.46 m / 125.00 m x 12.50 m x 4.50 m
Armament:
6 - 4.13" / 105 mm guns (3x2 guns), 35.32lbs / 16.02kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward
16 - 1.57" / 40.0 mm guns (4x4 guns), 1.95lbs / 0.88kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 243 lbs / 110 kg
Shells per gun, main battery: 350
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 68,601 shp / 51,176 Kw = 35.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 536 tons
Complement:
208 - 271
Cost:
£2.060 million / $8.240 million
Distribution of weights at normal displacement:
Armament: 30 tons, 1.0 %
Machinery: 1,669 tons, 53.5 %
Hull, fittings & equipment: 826 tons, 26.4 %
Fuel, ammunition & stores: 411 tons, 13.2 %
Miscellaneous weights: 185 tons, 5.9 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
765 lbs / 347 Kg = 21.7 x 4.1 " / 105 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.26
Metacentric height 2.0 ft / 0.6 m
Roll period: 12.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.23
Seaboat quality (Average = 1.00): 1.05
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.440
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 20.25 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 67
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: 22.15 ft / 6.75 m
- Forecastle (20 %): 21.00 ft / 6.40 m
- Mid (60 %): 19.69 ft / 6.00 m (12.80 ft / 3.90 m aft of break)
- Quarterdeck (15 %): 12.80 ft / 3.90 m
- Stern: 12.80 ft / 3.90 m
- Average freeboard: 17.55 ft / 5.35 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 187.5 %
- Above water (accommodation/working, high = better): 170.0 %
Waterplane Area: 10,642 Square feet or 989 Square metres
Displacement factor (Displacement / loading): 75 %
Structure weight / hull surface area: 40 lbs/sq ft or 193 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.80
- Overall: 0.57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Breakdown of Miscellaneous Weights:
- 160 tons for 160 FMO-37/950 naval mines
- 25 tons for electronics fit (including hydrophones) and ASW
Quoted
Originally posted by Brockpaine
Hmm, Bulgaria's definitely interested in the HDW proposal... (but did you note the hull strength is .50 for a ship over 3,000 tons?)
This post has been edited 1 times, last edit by "gaiasabre11" (Dec 25th 2009, 11:18pm)
This post has been edited 1 times, last edit by "Hrolf Hakonson" (Dec 26th 2009, 1:31pm)
Quoted
Originally posted by Brockpaine
Hrolf: Bulgaria will consider 150mm guns, but I feel a dual-purpose weapon is a bit mandatory on this ship because of the threat of aircraft on the Black Sea. Hence why 105mm and 130mm guns were spec'ed instead of 150mm. Though the 88s are a good addition.
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