Torpedo Director Pattern 2390
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Robinson Disc[Inference] added to 2390 to set course of enemy as expressed as inclination.[1]
Note the lack of any graduations on the sighting arm.
Note the lack of any graduations on the sighting arm.
The Torpedo Director Pattern 2390 was a British Torpedo Director available by 1912 at least, and supplied to torpedo craft with heater torpedoes.
Similar to the Pattern 1895, but graduated for higher torpedo and enemy speeds.[2][3][4]
It was not circular, and probably a 60 degree arc like the 1895.[5][Inference] It lacked graduations on its sighting arm, but by 1916 at least, they sported inclination discs.
The Pattern 2390a had more rigid pivots, sturdier construction, and a sighting arm that was solid rather than slotted, and made of hard rolled brass.[6]
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