Quoted
Ly Thuong Kiet, Indochinese Destroyer laid down 1947
Displacement:
2,550 t light; 2,765 t standard; 3,170 t normal; 3,494 t full load
Dimensions: Length overall / water x beam x draught
423.23 ft / 423.23 ft x 42.32 ft x 14.11 ft (normal load)
129.00 m / 129.00 m x 12.90 m x 4.30 m
Armament:
6 - 5.12" / 130 mm guns (3x2 guns), 79.37lbs / 36.00kg shells, 1947 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, majority aft, 1 raised mount aft - superfiring
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.89kg shells, 1947 Model
Anti-aircraft guns in deck mounts with hoists
on centreline, all amidships, all raised mounts - superfiring
8 - 0.91" / 23.0 mm guns (4x2 guns), 0.37lbs / 0.17kg shells, 1947 Model
Machine guns in deck mounts
on side ends, evenly spread, all raised mounts - superfiring
Weight of broadside 487 lbs / 221 kg
Shells per gun, main battery: 550
15 - 21.7" / 550 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.59" / 15 mm 0.20" / 5 mm -
3rd: 0.59" / 15 mm 0.20" / 5 mm -
- Conning tower: 1.18" / 30 mm
Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 2 shafts, 50,589 shp / 37,740 Kw = 34.00 kts
Range 5,110nm at 18.00 kts
Bunker at max displacement = 729 tons
Complement:
210 - 274
Cost:
£2.287 million / $9.146 million
Distribution of weights at normal displacement:
Armament: 62 tons, 1.9 %
Armour: 28 tons, 0.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 22 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 5 tons, 0.2 %
Machinery: 1,238 tons, 39.1 %
Hull, fittings & equipment: 992 tons, 31.3 %
Fuel, ammunition & stores: 620 tons, 19.6 %
Miscellaneous weights: 230 tons, 7.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,264 lbs / 573 Kg = 18.9 x 5.1 " / 130 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 1.8 ft / 0.5 m
Roll period: 13.4 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.54
Seaboat quality (Average = 1.00): 1.15
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.439
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 23.66 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 61
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.97 ft / 7.00 m
- Forecastle (20 %): 22.15 ft / 6.75 m
- Mid (50 %): 21.33 ft / 6.50 m (14.44 ft / 4.40 m aft of break)
- Quarterdeck (15 %): 14.44 ft / 4.40 m
- Stern: 14.44 ft / 4.40 m
- Average freeboard: 18.23 ft / 5.56 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 152.9 %
- Above water (accommodation/working, high = better): 73.4 %
Waterplane Area: 11,762 Square feet or 1,093 Square metres
Displacement factor (Displacement / loading): 98 %
Structure weight / hull surface area: 45 lbs/sq ft or 218 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.53
- Longitudinal: 1.92
- Overall: 0.60
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
Breakdown of Miscellaneous Weights:
- 70 tons for electronics
- 15 tons for degaussing system
- 35 tons for HVAC
- 15 tons for two LRASM Modele 1947 2x4 32cm launchers and reloads
- 40 tons for 15 550mm torpedo reloads (~2.5t each)
- 5 tons for paravanes and assorted mine-defense gear
- 50 tons for crew comfort and damage control systems
Electronics:
- DRBV-11 Moselle PA search radar (1 radar, 15 tons)
- DRBV-10 DP sentry radar (1 radar, 10 tons)
- DRBN-1 navigational surface and air search radar (1 radar, 2 tons)
- DRBC-4 DP fire-control radar (2 radars, 10 tons)
- ARBR-2 radar jammer/detector (1 unit, 2 tons)
- SAGEM HF/DF (3 tons)
- ASDIC (18 tons)
- Diesel electric generator set (5 tons)
- Gunnery Computer for 130mm and 40mm guns (5 tons)
Ships in Class:
- Ly Thuong Kiet
- Ngo Quyen
- Tran Binh Trong
- Tran Quang Khai
Zero degree angle on the bow? Not necessarily ‘wrong’ but certainly old fashioned.
Fifteen torpedo tubes? I presume this would three quintuple mounts on the centerline. I would consider that overkill, but if you are looking at something like a Shimakaze, it is not unreasonable – but I have to wonder if Indochina needs something that offensive. YMMV.
Taken as a whole, the design seems as if it is trying to do too many things – surface combatant, sub-hunter, and fast minesweeper. It’s not my thing, and the top-weight stand a downward revision; again, YMMV.
Taken as a whole, the design seems as if it is trying to do too many things – surface combatant, sub-hunter, and fast minesweeper. It’s not my thing, and the top-weight stand a downward revision; again, YMMV.
It's really only one thing - a surface combatant. Definitely not a minesweeper. While it can do sub-hunting, it's not really intended for that.
Generally a sound design, but I wonder about the steam-diesel set up, is that for range? If so they don't seem particularly long-legged.
Quoted
Ly Thuong Kiet, Indochinese Destroyer laid down 1947
Displacement:
1,950 t light; 2,074 t standard; 2,370 t normal; 2,607 t full load
Dimensions: Length overall / water x beam x draught
409.67 ft / 393.70 ft x 36.42 ft x 14.11 ft (normal load)
124.87 m / 120.00 m x 11.10 m x 4.30 m
Armament:
4 - 3.94" / 100 mm guns in single mounts, 35.27lbs / 16.00kg shells, 1947 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
1 - 3.94" / 100 mm guns in single mounts, 35.27lbs / 16.00kg shells, 1947 Model
Automatic rapid fire gun in a deck mount with hoist
on centreline amidships, 1 raised gun
8 - 1.57" / 40.0 mm guns (4x2 guns), 1.95lbs / 0.89kg shells, 1947 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
4 - 0.59" / 15.0 mm guns in single mounts, 0.10lbs / 0.05kg shells, 1947 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 192 lbs / 87 kg
Shells per gun, main battery: 650
8 - 21.7" / 550 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.39" / 10 mm 0.39" / 10 mm
2nd: 0.98" / 25 mm 0.39" / 10 mm 0.39" / 10 mm
3rd: 0.59" / 15 mm 0.20" / 5 mm -
- Conning tower: 1.18" / 30 mm
Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 2 shafts, 42,655 shp / 31,820 Kw = 34.00 kts
Range 4,400nm at 18.00 kts
Bunker at max displacement = 532 tons
Complement:
169 - 220
Cost:
£1.701 million / $6.805 million
Distribution of weights at normal displacement:
Armament: 25 tons, 1.1 %
Armour: 16 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 11 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 5 tons, 0.2 %
Machinery: 1,034 tons, 43.6 %
Hull, fittings & equipment: 741 tons, 31.3 %
Fuel, ammunition & stores: 420 tons, 17.7 %
Miscellaneous weights: 135 tons, 5.7 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
894 lbs / 405 Kg = 29.3 x 3.9 " / 100 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 1.5 ft / 0.4 m
Roll period: 12.7 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.32
Seaboat quality (Average = 1.00): 1.11
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.410
Length to Beam Ratio: 10.81 : 1
'Natural speed' for length: 22.77 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 64
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.98 ft / 6.70 m
- Forecastle (15 %): 21.33 ft / 6.50 m
- Mid (30 %): 20.67 ft / 6.30 m (13.45 ft / 4.10 m aft of break)
- Quarterdeck (15 %): 13.45 ft / 4.10 m
- Stern: 13.45 ft / 4.10 m
- Average freeboard: 15.80 ft / 4.82 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 158.0 %
- Above water (accommodation/working, high = better): 92.5 %
Waterplane Area: 9,217 Square feet or 856 Square metres
Displacement factor (Displacement / loading): 96 %
Structure weight / hull surface area: 41 lbs/sq ft or 199 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.58
- Longitudinal: 1.95
- Overall: 0.65
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
Breakdown of Miscellaneous Weights:
- 55 tons for electronics
- 15 tons for degaussing system
- 35 tons for HVAC
- 15 tons for two LRASM Modele 1947 2x4 32cm launchers and reloads
- 15 tons for additional gear
Electronics:
- DRBV-10 DP sentry radar (1 radar, 10 tons)
- DRBN-1 navigational surface and air search radar (1 radar, 2 tons)
- DRBC-4 DP fire-control radar (2 radars, 10 tons)
- ARBR-2 radar jammer/detector (1 unit, 2 tons)
- SAGEM HF/DF (3 tons)
- ASDIC (18 tons)
- Diesel electric generator set (5 tons)
- Gunnery Computer for 100mm and 40mm guns (5 tons)
Ships in Class:
- Ly Thuong Kiet
- Ngo Quyen
- Tran Binh Trong
- Tran Quang Khai
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