Newfoundland Class, Canadian Destroyers laid down 1940
Background : My Newfoundland Class DDs are based on the successful US Fletcher Class (1939).They are roughly the same size (2800 t vs. the Fletcher’s 2500 t) and one knot slower (35 knots). The Newfoundland’s have been designed with better maneuverability and sea-keeping in mind, and is perhaps the best of any destroyer class. The class sports the same flush-deck hull as the Fletchers, but a raised freeboard for better operations in inclement weather. They pack a gun armament of five 5-inch guns, twenty 40mm guns and ten 20mm guns to ward off any enemy aircraft, and a heavy ASW weapon suite consisting of a single quad-torpedo launcher in a center rotating tube, depth charge racks at the ship’s stern, and 3 Squid-style ASW mortar launchers. They are fast, hard-wearing, pack a powerful punch, and ready to tackle the Pacific campaign against Japan.
Displacement: 2,165 t light; 2,312 t standard; 2,592 t normal; 2,816 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(367.00 ft / 360.00 ft) x 40.00 ft x (14.00 ft / 14.83 ft)
(111.86 m / 109.73 m) x 12.19 m x (4.27 m / 4.52 m)
Gun Armament:
5 - 5.00" / 127 mm 38.0 cal guns – 54.00 lbs / 24.49 kg shells, 300 per gun
Dual purpose guns in deck and hoist mounts, 1950 Model
5 x Single mounts on centerline (evenly spread)
3 raised mounts
20 - 1.57" / 40.0 mm 60.0 cal guns - 2.14 lbs / 0.97 kg shells, 2,000 per gun
Anti-air guns in deck and hoist mounts, 1950 Model
5 x 2 row quad mounts on sides (evenly spread)
2 raised mounts
10 - 0.79" / 20.0 mm 70.0 cal guns - 0.26 lbs / 0.12 kg shells, 2,000 per gun
Anti-air guns in deck and hoist mounts, 1950 Model
10 x Single mounts on sides, evenly spread
4 raised mounts
Weight of broadside 315 lbs / 143 kg
ASW Armament:
• Torpedoes: 4 - 20.0" / 508 mm, 29.50 ft / 8.99 m torpedoes - 1.823 t each, 7.290 t total
o In 1 quadruple-set deck mounted center-rotating launcher
• Depth Charges: 20 - 200.00 lbs / 90.72 kg Depth Charges + 10 reloads - 2.679 t total
o In Stern depth charge racks
• Mortars: 9 - 440.00 lbs / 199.58 kg trainable AS Mortars (Squid-type) + 12 reloads - 4.125 t total
o In 3 sets of triple-tube launchers located on aft deck aft
Armor:
- Torpedo Bulkhead - Strengthened structural bulkheads:
1.50" / 38 mm 234.00 ft / 71.32 m 12.00 ft / 3.66 m
Beam between torpedo bulkheads 30.00 ft / 9.14 m
- Gun Armor: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.80" / 20 mm - 0.80" / 20 mm
Machinery:
• Oil fired boilers, steam turbines,
• Geared drive, 2 shafts, 38,930 shp = 35 knots
• Range 6,000 nm @ 15 kts
• Bunker at normal / max displacement = 280 tons / 503 tons (Fuel Oil)
Wartime Complement: 181 - 236
Cost: £1.863 million / $7.451 million
Distribution of weights at normal displacement:
• Armament: 158 tons, 6.1 %
o Guns: 95 tons, 3.7 %
o Weapons: 63 tons, 2.4 %
• Armor: 167 tons, 6.4 %
o Torpedo bulkhead: 156 tons, 6.0 %
o Armament: 11 tons, 0.4 %
• Machinery: 931 tons, 35.9 %
• Hull, fittings & equipment: 834 tons, 32.2 %
• Fuel, ammunition & stores: 427 tons, 16.5 %
• Miscellaneous weights: 75 tons, 2.9 %
o Hull above water: 25 tons
o On freeboard deck: 25 tons
o Above deck: 25 tons
Overall survivability and seakeeping ability:
• Survivability (Non-critical penetrating hits needed to sink ship):
o 1,993 lbs / 904 kg = 31.9 x 5.0 " / 127 mm shells or 0.4 torpedoes
• Stability (Unstable if below 1.00): 1.26
• Metacentric Height (GM): 1.9 ft / 0.6 m
• Roll Period: 12.1 seconds
• Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.35
• Seaboat quality (Average = 1.00): 0.89
Hull Form Characteristics:
• Hull has a flush deck, a normal bow and small transom stern
• Block coefficient (normal/deep): 0.450 / 0.461
• Length to Beam Ratio: 9.00 : 1
• 'Natural speed' for length: 25.42 kts
• Power going to wave formation at top speed: 67 %
• Trim (Max stability = 0, Max steadiness = 100): 56
• Bow angle (Positive = bow angles forward): 5.45 degrees
• Stern overhang: 5.00 ft / 1.52 m
• Freeboard Breakdown (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 21.00 ft / 6.40 m, 18.00 ft / 5.49 m
- Forward deck: 30.00 %, 18.00 ft / 5.49 m, 15.00 ft / 4.57 m
- Aft deck: 35.00 %, 15.00 ft / 4.57 m, 13.00 ft / 3.96 m
- Quarter deck: 15.00 %, 13.00 ft / 3.96 m, 13.00 ft / 3.96 m
- Average freeboard: 15.64 ft / 4.77 m
Ship Space, Strength and Comments:
• Space - Hull below water (magazines/engines, low = better): 175.7 %
- Above water (accommodation/working, high = better): 130.4 %
• Waterplane Area: 9,399 square feet or 873 square meters
• Displacement Factor (displacement / loading): 108 %
• Structure weight / hull surface area: 62 lbs/sq ft or 304 kg/sq meter
• Hull Strength (Relative):
o Cross-sectional: 0.83
o Longitudinal: 2.51
o Overall: 0.93
• Cramped machinery, storage, compartmentation space
• Excellent accommodation and workspace room
• Poor seaboat, wet and uncomfortable, reduced performance in heavy weather