el cid again
Posts: 16922
Joined: 10/10/2005 Status: offline
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Reworking Japanese DDs, I decided to tackel the problem of the 5 inch 50 destroyer gun. The problem is that there are two of these weapons - or actually four divided into two performance groups: an SP and a DP. I decided to designate the SP as the A and C models (which elevate 45 and 55 degrees respectively) and the DP as the B and D models (which elevate to 75 degrees - not quite the ideal 90 degrees of an AA gun - but definitely in the DP range. The problems is - what to use for a slot? To get there I followed John Campbell, combining the 4.7 inch Type 3 and Type 11 - he only lists one set of data for them both in fact in Naval Weapons of World War Two. Both are 45 caliber SP guns. I had also combined in the Elswick gun - of only 40 calibers - but if we ever identify it on a vessel - we can use it in its British form (there being no production of ship devices anyway) - and I don't know of a single case where we actually need it. Presumably it has a shorter range. Working through this, I found that we should increase the range of the SP to 20 (up from 18) because, while its range is indeed 18,000 meters - that is 20,100 yards, and the game thinks in yards, even if I think metric. At the same time, I found the 4.7 inch should be 17 (down from 18) - because its range is only 17,500 yards - and because probably it includes an even shorter range 3 YT gun - which has a lower mv. Now there is a problem with the DP gun - insofar as it cannot really be an AA gun and an SP gun at the same time data wise. RHS practice is to give the gun an "effective ceiling" out to a range = to that ceiling - and no more. In this case, I compared it to the 5 inch 40 DP - with a ceiling of just over 30,000 feet so range = 10 (10,000 yards) - and assigned a value of 32,000 feet - so range will be 11 (11,000 yards) - giving token recognition to the greater range of the 50 - and also that the same shell out of a longer tube should have a higher mv. This is a bit of a compromise - for one thing these guns don't really elevate fully - and for another ALL AA and DP guns have too much altitude performance at longer ranges - but it prevents planes from overflying with impunits not to rate altitude for a great range - and it prevents surface action from being at horribly short ranges not to restrict range too much. EDIT: I regretfully have concluded that we should change the rating system for guns. First, an SP gun should use the anti-soft value of its HE shells rather than its fragmentation shells (that is, square root of 1.5 times the effect, which is 2/3 of its shell weight). Exception: in a strictly historical scenario (CVO and BBO families) keep it as is: the British did not have HE shells for the Singapore 15 inch CD guns. But in the EOS family, the shells arrive - because they really were en route - and just a little more concern a little sooner would have given them time to arrive. Second, since DP guns are given the effect value of their AP shells, they also should get this boost. This applies to many (most) naval and CD guns - a lot of work - but better simulation.
< Message edited by el cid again -- 10/19/2007 11:18:21 PM >
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