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keltos01 · 06-18-08, 05:59 AM

http://www.fleetsubmarine.com/tdc.html

"Most, like the "fruit machine" used in British submarines, were basic angle solvers, providing readings that would be manually input into the torpedoes. While certainly a good start, it still required the commander to "aim" his boat onto a particular bearing, and calculate the correct moment to fire the torpedo, which would have been manually set with what was predicted to be the correct gyro angle."

from JackieFisher : http://www.subsim.com/radioroom/showthread.php?t=87470

"The British had no real aiming computer until midway through the war, at which point a clever slide-rule called an "Is-was" which was invented by one of her most successful captains was rapidly adopted, but first on a very informal means of manufacture.

I believe there is one of them on display in the National Maritime Museum at present. I do not have any details, and photography was prohibited."

so we can use the TDC from the american subs for the Class T no problem !

see also :
http://hnsa.org/doc/attackfinder/index.htm

is-was picture :

how to actually make one :
http://www.subsim.com/radioroom/showthread.php?t=106923

found this info :http://www.navweaps.com/Weapons/WTBR_PostWWII.htm

Date Of DesignAbout 1925
Date In Service1927
Weight3,452 lbs. (1,566 kg)
Overall Length259 in (6.579 m)
Explosive Charge805 lbs. (365 kg) Torpex
Range / Speed5,000 yards (4,570 m) / 45.5 knots
PowerBurner-cycle

Notes: The Mark VIII was the first burner-cycle torpedo in service. Although the original design dates from the 1920s, those manufactured during and after World War II were to a much-modified design. This torpedo was still in use as late as 1982 when three of them were used during the Falklands War to sink the Argentine cruiser Belgrano. It may still be in use in the navies of other nations that Britain has supplied with submarine weapons..

06-18-08, 05:59 AM	#5
keltos01 Silent Hunter Join Date: Feb 2008 Location: Milan Italy Posts: 4,999 Downloads: 114 Uploads: 18	British "fruit machine" http://www.fleetsubmarine.com/tdc.html "Most, like the "fruit machine" used in British submarines, were basic angle solvers, providing readings that would be manually input into the torpedoes. While certainly a good start, it still required the commander to "aim" his boat onto a particular bearing, and calculate the correct moment to fire the torpedo, which would have been manually set with what was predicted to be the correct gyro angle." from JackieFisher : http://www.subsim.com/radioroom/showthread.php?t=87470 "The British had no real aiming computer until midway through the war, at which point a clever slide-rule called an "Is-was" which was invented by one of her most successful captains was rapidly adopted, but first on a very informal means of manufacture. I believe there is one of them on display in the National Maritime Museum at present. I do not have any details, and photography was prohibited." so we can use the TDC from the american subs for the Class T no problem ! see also : http://hnsa.org/doc/attackfinder/index.htm is-was picture : how to actually make one : http://www.subsim.com/radioroom/showthread.php?t=106923 found this info :http://www.navweaps.com/Weapons/WTBR_PostWWII.htm Date Of DesignAbout 1925 Date In Service1927 Weight3,452 lbs. (1,566 kg) Overall Length259 in (6.579 m) Explosive Charge805 lbs. (365 kg) Torpex Range / Speed5,000 yards (4,570 m) / 45.5 knots PowerBurner-cycle Notes: The Mark VIII was the first burner-cycle torpedo in service. Although the original design dates from the 1920s, those manufactured during and after World War II were to a much-modified design. This torpedo was still in use as late as 1982 when three of them were used during the Falklands War to sink the Argentine cruiser Belgrano. It may still be in use in the navies of other nations that Britain has supplied with submarine weapons.. __________________ "Honorable Builder of Sinking Ships" Last edited by keltos01; 06-18-08 at 09:22 AM.