British 18-inch torpedo
There have been a number of 18-inch (45cm) torpedoes in service with the Royal Navy of the United Kingdom.
These have been used on ships of the Royal Navy and aircraft of both the Fleet Air Arm and Royal Air Force, while Royal Navy surface ships and submarines use 21-inch torpedoes.
The British 18-inch torpedoes were 17.72 inches (45.0 cm) in diameter, beginning with the "Fiume" Whitehead torpedo of 1890.
45 cm "Fiume" (Whitehead) torpedo
[edit]First introduced into British service in 1894.[1]
- Year : about 1888
- Weight : 845 lb (383 kg)
- Length : 11 ft 8 in (3.56 m)
- Warhead : 118 lb (54 kg) wet gun-cotton
- Performance : 26.5 knots (49.1 km/h; 30.5 mph) for 800 yd (730 m)
- Propulsion : Compressed air
Mark V
[edit]Used on the River-class and 1905 Tribal-class destroyers.
- Year : about 1899[1]
- Weight : 1,353 lb (614 kg)
- Warhead : 296 lb (134 kg) including pistol
- Propulsion : Compressed air
Mark VI
[edit]Used on destroyers of the early 1900s.
- Year : about 1904[1]
- Performance : 28.5 knots (52.8 km/h; 32.8 mph) for 4,000 yd (3,700 m) or 41 knots (76 km/h; 47 mph) for 1,000 yd (910 m)
- Propulsion : Compressed air
Mark VII and VII*
[edit]Introduced on the 1908 members of the 1905 Tribal class destroyers. Used by torpedo boats built before the First World War and destroyers. Used by RAF flying boats in the 1920s.
- Year : 1907[1]
- Warhead : 320 lb (150 kg) TNT
- Performance :
- Mark VII :
30 knots (56 km/h; 35 mph) for 6,000–7,000 yd (5,500–6,400 m)
41 knots (76 km/h; 47 mph) for 3,000 yd (2,700 m) - Mark VII* :
29 knots (54 km/h; 33 mph) for 7,000 yd (6,400 m)
35 knots (65 km/h; 40 mph) for 5,000 yd (4,600 m)
- Mark VII :
- Propulsion : Wet-heater
Mark VIII
[edit]- Year: 1913
- Role: Submarines and aircraft (Note: During World War II and after the Mk.VIII was a 21-inch torpedo)
- Warhead: 320 lb (150 kg) TNT
- Propulsion: Wet heater
- Performance: 35 knots (65 km/h; 40 mph) for 2,500 yd (2,300 m)
Mark XI
[edit]- Year: 1934
- Aircraft carried
- Dimensions: 17.72 in (450 mm) dia.
- Warhead: 465 lb (211 kg) TNT
- Propulsion: Burner cycle
- Performance: 35 knots (65 km/h; 40 mph) for 2,500 yd (2,300 m)
Mark XII
[edit]| 18-inch Mark XII | |
|---|---|
 A Mark XII torpedo fitted to a Bristol Beaufighter | |
| Type | Torpedo |
| Place of origin | United Kingdom |
| Service history | |
| In service | 1937-1945 |
| Production history | |
| Designed | 1935 |
| Specifications | |
| Mass | 1,548 lb (702 kg) |
| Length | 16 ft 3 in (4.95 m) |
| Diameter | 17.72 in (450 mm) |
| Warhead | TNT |
| Warhead weight | 388 lb (176 kg) |
| Engine | Burner cycle 140 hp (at 40 knots) |
| Maximum speed | 40 knots (74 km/h; 46 mph) for 1,500 yd (1,400 m) or 37 knots (69 km/h; 43 mph) for 3,500 yd (3,200 m) |
Aircraft launched, used by Fleet Air Arm and RAF Coastal Command.
Mark XIV
[edit]| 18-inch Mark XIV | |
|---|---|
| Type | Torpedo |
| Place of origin | United Kingdom |
| Production history | |
| Designed | around 1938 |
| Specifications | |
| Mass | 1,630 lb (740 kg) |
| Diameter | 17.72 in (450 mm) |
| Warhead | TNT |
| Warhead weight | 375 lb (170 kg) |
| Engine | Whitehead wet heater (methyl fuel) |
| Maximum speed | 45 knots (83 km/h; 52 mph) for 1,650 yd (1,510 m) or 41 knots (76 km/h; 47 mph) for 2,950 yd (2,700 m) |
The Mark XIV was an aircraft-launched torpedo. Stocks were lost with the fall of Singapore.
Mark XV
[edit]| 18-inch Mark XV | |
|---|---|
| Type | Torpedo |
| Place of origin | United Kingdom |
| Production history | |
| Designed | around 1942 |
| Specifications | |
| Mass | 1,801 lb (817 kg) |
| Diameter | 17.69 in (449 mm) |
| Warhead | TNT |
| Warhead weight | 545 lb (247 kg) |
| Engine | Whitehead wet heater (methyl fuel) |
| Maximum speed | 40 knots (74 km/h; 46 mph) for 2,500 yd (2,300 m) or 33 knots (61 km/h; 38 mph) for 3,200 yd (2,900 m) |
- Year: 1942
- Operators: Fleet Air Arm, RAF Coastal Command, Royal Navy
- Role: Aircraft and Motor Torpedo Boats, 1943 onwards
- Dimensions: 17.69 in (449 mm) × 17 ft 2.7 in (5.250 m)
- Warhead: 545 lb (247 kg) Torpex
- Propulsion: Burner cycle
- Performance: 40 knots (74 km/h; 46 mph) for 2,500 yd (2,300 m) or 33 knots (61 km/h; 38 mph) for 3,200 yd (2,900 m)[2]
Mark XVI
[edit]Electric torpedo project not completed.
Mark XVII
[edit]- United Kingdom, 1944
- Aircraft launched
- Operated by FAA, RAF Coastal Command, Blackburn Firebrand
- Dimensions: 17.72 in (450 mm) × 17 ft 3 in (5.26 m)
- Warhead: 600 lb (270 kg) Torpex
- Propulsion: Burner cycle
- Performance: 40 knots (74 km/h; 46 mph) for 2,500 yd (2,300 m)
Mark 30 Dealer
[edit]
An air-dropped passive acoustic homing torpedo known as "Dealer". The program was initiated in 1943, with the goal of developing a parachute-dropped ASW weapon.[3] At the end of the Second World War the "Dealer" project was renamed "Dealer A" and became further branched out into the 21-inch "Bidder" and 18-inch "Dealer B" projects.[4] Thus, the Mark 30 Dealer was developed alongside the Mark 20 Bidder and shared elements of its design.[5] The original design for the Dealer torpedo (Dealer A) had no control surfaces, being steered by two propellers that varied in speed, in a manner similar to the Italian-supplied LT 350 used by Germany. Pitch control was achieved by moving the battery fore and aft. Dealer A did not see service use, but its successor, Dealer B (Mark 30 Mod 0), a conventional design of a passive acoustic homing finned torpedo using contra-rotating propellers, achieved a high hit rate against submerged targets during trials in 1953 and was issued starting in June 1954. Since Dealer A never entered service, Dealer B was simply called "Dealer". Approximately 1200 units were built in total, with the weapon serving in both the RN and RAF until 1970. The Mark 30 Mod 1, a successor design, had several improvements but this program was canceled in 1955 in favor of purchasing Mark 43 Mod 3 torpedoes from the United States.[6] The reason for this decision was the impending retirement of the Avro Shackleton and Fairey Gannet aircraft, with no adequate replacement; the upcoming Westland Wasp ASW helicopter was incapable of carrying the Mark 30.[7] Although the decision to retire the aircraft were stalled, the Mark 30 Mod 1 would not see development. Trials with the Mark 44 in 1956 indicated that the hit rate was approximately four times worse than the Mark 30 Dealer in its original form, but nonetheless, the British government went ahead with their decision, placing a contract with the Plessey Company for standardizing the American torpedoes for British use. The Mark 43 was intended to serve as a stopgap until the arrival of the Mark 44, but this did not occur until 1966.[4] In 1957, preliminary work was being done on a 14-inch, 25-knot active/passive homing aerial torpedo for helicopter delivery, using the motor of the Mark 30. This, much like the Mark 30 Mod 1, was passed up in favor of American torpedoes and the Mark 21 Pentane, which in turn would be cancelled shortly thereafter. Additionally, beginning in the mid-1960s, there was a project for a Mark 31 aerial torpedo successor to the Mark 30, designed to surpass the Mark 44. This project would be cancelled in 1971 in favor of purchasing the Mark 46.[8]
Mark 30 Mod 0
- Entered service: 1954
- Weight: 646 lb (293 kg)
- Length: 8 ft 0.5 in (2.451 m)
- Explosive charge: 90 lb (41 kg) Torpex
- Range and speed: 9,000 yd (8,200 m) at 12.5 kn (23.2 km/h), 2,500 yd (2,300 m) at 19 kn (35 km/h)
See also
[edit]References
[edit]- ^ Campbell, John (2002). Naval Weapons of World War Two. Annapolis, Maryland: Naval Institute Press. p. 87. ISBN 0-87021-459-4.
- ^ Kirby, Geoff (March 1972). JRNSS Volume 27, No.2 - A History of the Torpedo, Part 3. Journal of the Royal Navy Scientific Service. p. 91.
- ^ a b Kirby, Geoff (March 1972). JRNSS Volume 27, No.2 - A History of the Torpedo, Part 3. Journal of the Royal Navy Scientific Service. p. 98.
- ^ Friedman, Norman (1986). The Postwar Naval Revolution. Naval Institute Press. p. 79. ISBN 0-87021-952-9.
- ^ Harding, Richard (2005). The Royal Navy, 1930-2000: Innovation and Defence. Frank Cass. p. 283. ISBN 0-714-65710-7.
- ^ Friedman, Norman (1986). The Postwar Naval Revolution. Naval Institute Press. p. 79. ISBN 0-87021-952-9.
- ^ "Mk 30 Torpedo". saairforce.co.za. Retrieved 7 July 2010.
External links
[edit]- Tony DiGiulian, Pre Second World War torpedoes
- Tony DiGiulian, Torpedoes of the Second World War