You are not logged in.

1

Wednesday, March 10th 2010, 6:38pm

Training Ships

Balgarski Lav-class Training Ship
- BVK Balgarski Lav - 1938
- BVK Trigradsko zhdrelo - 1942

2

Wednesday, March 10th 2010, 6:39pm



Quoted

[SIZE=3]Balgarski Lav, Bulgarian Clipper laid down 1938[/SIZE]

Displacement:
971 t light; 1,005 t standard; 1,470 t normal; 1,843 t full load

Dimensions: Length overall / water x beam x draught
278.46 ft / 250.00 ft x 34.50 ft x 15.70 ft (normal load)
84.87 m / 76.20 m x 10.52 m x 4.79 m
Length with bowsprit: 300 feet

Armament:
1 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1939 Model
Anti-aircraft gun in deck mount
on centreline forward
2 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, all amidships
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1939 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 26 lbs / 12 kg
Shells per gun, main battery: 250

Machinery:
Diesel Internal combustion motors,
Geared drive, 1 shaft, 1,835 shp / 1,369 Kw = 15.00 kts
Range 12,000nm at 15.00 kts
Bunker at max displacement = 838 tons

Sails:
Square-rigged ship; 3 masts
2200 m² of canvas
17-18 knots at maximum sailing performance

Complement:
118 - 154

Cost:
£0.254 million / $1.016 million

Distribution of weights at normal displacement:
Armament: 3 tons, 0.2 %
Machinery: 50 tons, 3.4 %
Hull, fittings & equipment: 718 tons, 48.9 %
Fuel, ammunition & stores: 499 tons, 33.9 %
Miscellaneous weights: 200 tons, 13.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
5,795 lbs / 2,629 Kg = 278.7 x 3.5 " / 88 mm shells or 3.1 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 1.3 ft / 0.4 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.02
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle, raised quarterdeck
Block coefficient: 0.380
Length to Beam Ratio: 7.25 : 1
'Natural speed' for length: 15.81 kts
Power going to wave formation at top speed: 37 %
Trim (Max stability = 0, Max steadiness = 100): 25
Bow angle (Positive = bow angles forward): 40.00 degrees
Stern overhang: 10.00 ft / 3.05 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.00 ft / 6.71 m
- Forecastle (20 %): 19.00 ft / 5.79 m (12.00 ft / 3.66 m aft of break)
- Mid (50 %): 12.00 ft / 3.66 m
- Quarterdeck (35 %): 19.00 ft / 5.79 m (12.00 ft / 3.66 m before break)
- Stern: 19.00 ft / 5.79 m
- Average freeboard: 16.09 ft / 4.90 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 29.2 %
- Above water (accommodation/working, high = better): 96.1 %
Waterplane Area: 4,962 Square feet or 461 Square metres
Displacement factor (Displacement / loading): 452 %
Structure weight / hull surface area: 61 lbs/sq ft or 300 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.17
- Longitudinal: 9.70
- Overall: 1.44
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Breakdown of Miscellaneous Weights:
- 200 tons for masts and sails

Notes:
- Armament for training and self-defense purposes only.
- Ballast partially simmed as fuel. Actual engine range is 2,000 nm at 15 knots
- Ship is based off the Dutch sail-training clipper Stad Amsterdam


The Bylgarski Lav is owned jointly by the the Bulgarian Navy and by the Navigation Maritime Bulgare (for the Bulgarian Merchant Marine). The Bylgarski Lav was partly paid for (10%) by the former Tsar of Bulgaria, Tsar Ferdinand, as a gift to the Navy and the country.

The weapons are put aboard for training and self-defense purposes.

3

Wednesday, March 14th 2012, 3:02pm

[SIZE=3]Trigradsko zhdrelo, Bulgarian Training Ship laid down 1942[/SIZE]
The Trigradsko zhdrelo is designed to serve as a small training vessel for use by navigators, deck officers, antiaircraft gunners, and antisubmarine specialists. Secondary use will be hydrographic survey and inspection duties.

Displacement:
187 t light; 215 t standard; 288 t normal; 346 t full load

Dimensions: Length overall / water x beam x draught
172.25 ft / 154.20 ft x 23.29 ft x 6.56 ft (normal load)
52.50 m / 47.00 m x 7.10 m x 2.00 m

Armament:
4 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread, 2 raised mounts - superfiring
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 9 lbs / 4 kg
Shells per gun, main battery: 4,000

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 1,017 shp / 759 Kw = 16.00 kts
Range 4,500nm at 15.00 kts
Bunker at max displacement = 131 tons

Complement:
34 - 45

Cost:
£0.071 million / $0.285 million

Distribution of weights at normal displacement:
Armament: 1 tons, 0.4 %
Machinery: 27 tons, 9.2 %
Hull, fittings & equipment: 106 tons, 36.9 %
Fuel, ammunition & stores: 101 tons, 35.1 %
Miscellaneous weights: 53 tons, 18.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
676 lbs / 307 Kg = 346.3 x 1.6 " / 40 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 0.8 ft / 0.2 m
Roll period: 11.0 seconds
Steadiness - As gun platform (Average = 50 %): 81 %
- Recoil effect (Restricted arc if above 1.00): 0.03
Seaboat quality (Average = 1.00): 1.85

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.428
Length to Beam Ratio: 6.62 : 1
'Natural speed' for length: 12.42 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 44
Bow angle (Positive = bow angles forward): 35.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 16.40 ft / 5.00 m
- Forecastle (20 %): 14.76 ft / 4.50 m (7.55 ft / 2.30 m aft of break)
- Mid (50 %): 7.38 ft / 2.25 m
- Quarterdeck (15 %): 7.38 ft / 2.25 m
- Stern: 7.87 ft / 2.40 m
- Average freeboard: 9.05 ft / 2.76 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 62.0 %
- Above water (accommodation/working, high = better): 93.6 %
Waterplane Area: 2,252 Square feet or 209 Square metres
Displacement factor (Displacement / loading): 251 %
Structure weight / hull surface area: 27 lbs/sq ft or 133 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.86
- Longitudinal: 3.86
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Breakdown of Miscellaneous Weights:
- 15 tons for ASW gear and practice depth charges
- 35 tons for trainee officers and crew
- 3 tons for communications equipment