Difference between revisions of "21-in Weymouth Mark II Torpedo"
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==Development and History== | ==Development and History== | ||
| − | At the start of the war, all 21-in Weymouth torpedoes in England were purchased | + | At the start of the war, all 21-in Weymouth torpedoes in England were purchased. Among these were twenty-four 21-in Weymouth Mark IIs intended for Japan. These were given to foreign-ordered vessels whose tubes could accommodate them. |
| + | |||
| + | ==Mark II== | ||
| + | Six of the 24 torpedoes were given to {{UK-Broke}}. They had 4 cylinder Whitehead engines. | ||
| + | |||
| + | The torpedoes had settings for 38 knots to 3,500 metres and 25 knots to 10,000 metres – an extreme range of 12,000 metres was specified, at unstated speed. The warhead was 350 pounds of T.N.T.. | ||
| + | |||
| + | A.V. pressure of 2,200 psi in 21.7 cubic inches, holding 249 pounds when fully charged. | ||
| + | |||
| + | These had an overall length of 262.71 inches without a pistol (which would add 4.5 or 5 more inches), a total weight of 2,908 +/- 10 pounds, all on, and double valve Mark I* type depth gear.{{ARTS1914|p. 11}} | ||
| + | |||
| + | ==Mark II 6.5m== | ||
| + | Eighteen of 24 torpedoes were given to {{UK-Erin}} (10), and {{UK-Agincourt}} (8), but their Elswick type submerged tubes required the torpedoes to be shortened to 6.5m from 6.8m by removing a section at the rear of the head. These were like the Mark II except as follows. | ||
| + | |||
| + | They had more settings to an extreme range of 12,000m:{{ARTS1914|pp. 10-11}} | ||
* 41 knots to 1,000 metres | * 41 knots to 1,000 metres | ||
* 41 knots to 2,000 metres [sic] | * 41 knots to 2,000 metres [sic] | ||
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* 25 knots to 10,000 metres | * 25 knots to 10,000 metres | ||
| − | + | The warhead was lighter than the unmodified Mark II's: 215 pounds of T.N.T.. | |
| + | |||
| + | These had an overall length of 255.72 inches with 5 inch Weymouth pistol, a total weight of 2,794 +/- 8 pounds, all on, and Ulan type depth gear. | ||
==Footnotes== | ==Footnotes== | ||
Revision as of 17:16, 30 November 2012
The 21-in Weymouth Mark II Torpedo was a heater torpedo built by Whitehead. The company loaned a single experimental torpedo to the Royal Navy in 1913.[1]
Development and History
At the start of the war, all 21-in Weymouth torpedoes in England were purchased. Among these were twenty-four 21-in Weymouth Mark IIs intended for Japan. These were given to foreign-ordered vessels whose tubes could accommodate them.
Mark II
Six of the 24 torpedoes were given to Broke. They had 4 cylinder Whitehead engines.
The torpedoes had settings for 38 knots to 3,500 metres and 25 knots to 10,000 metres – an extreme range of 12,000 metres was specified, at unstated speed. The warhead was 350 pounds of T.N.T..
A.V. pressure of 2,200 psi in 21.7 cubic inches, holding 249 pounds when fully charged.
These had an overall length of 262.71 inches without a pistol (which would add 4.5 or 5 more inches), a total weight of 2,908 +/- 10 pounds, all on, and double valve Mark I* type depth gear.[2]
Mark II 6.5m
Eighteen of 24 torpedoes were given to Erin (10), and Agincourt (8), but their Elswick type submerged tubes required the torpedoes to be shortened to 6.5m from 6.8m by removing a section at the rear of the head. These were like the Mark II except as follows.
They had more settings to an extreme range of 12,000m:[3]
- 41 knots to 1,000 metres
- 41 knots to 2,000 metres [sic]
- 38 knots to 3,500 metres
- 29 knots to 7,000 metres
- 25 knots to 10,000 metres
The warhead was lighter than the unmodified Mark II's: 215 pounds of T.N.T..
These had an overall length of 255.72 inches with 5 inch Weymouth pistol, a total weight of 2,794 +/- 8 pounds, all on, and Ulan type depth gear.
Footnotes
Bibliography
