Posted 09 December 2008 - 06:53 PM
Co diver,Yes, you’ve the Amendment 1 torpedo application correct.Given the space limitations on the chart, the “Standard” range scale is a composite for the 21” Type 6, the 24” Type 8 and the 24” Type 90 – all of which were employed in WWII by IJN ships that did not carry the Type 93. There are many range settings that could have been employed as a check of www.NavWeaps.com or Campbell’s Naval Weapons of World War Two will show.The medium/long range setting was selected as being applicable to the widest range of tactical situations for the torpedoes using the “Standard” scale. These all had the same range of 10,900 yds, hence they were grouped into the same scale. Like any compromise, this simplification is handy, but does not reflect all details. The torpedo speeds at this range setting varied by type. For those who would like to reflect this additional detail, here are the speeds by type:Type 6 (21”) 10,900 yds @ 32 ktsType 8, No 1 (24”) 10,900 yds @ 37 ktsType 8, No 2 (24”) 10,900 yds @ 38 ktsType 90 (24”) 10,900 yds @ 42 ktsYou can agree on an option before beginning a scenario to employ these detailed range/speed scales in place of the compromise scale listed on the Amendment 1 IJN chart. Range bands for each Game Turn would be multiples of the torpedo speed. A Type 6 spread would have a range band of 1 – 3,200 yds fore the first Game Turn, 3,300 – 6,400 yds for Game Turn two and so on. Just list the individual range bands for each type on a 3 x 5 card for handy reference during a scenario and you’re ready to go.While ships equipped with the 21” Type 6 are clearly identified on the IJN Ship Logs, it is often not clear which of the conventional 24” torpedo types was carried by a particular ship at a given point in time. Not all were upgraded to the Type 90 and, like other navies, a ship probably got what was in stock or available when she drew her torpedoes. If you are fortunate enough to find the type data for a historical engagement being simulated, use it. Otherwise, you’ll need to agree on which type of 24” to employ in the scenario.This will enable you to include additional detail in your Wake Island Sweep scenario this weekend. Looking forward to an After Action Report.LONNIE