As for the ASROC/Mk.13 or 22/Gun turret layout. .. Why not have the ASROC aft where I had it, and the turret forward? That would allow the Mk.13 instead of the 22 which would give me significantly more magazine space and missiles. These ships are designed as the main screening element for Task Force/Group/Fleet protection so I would think having more AA capability would be something to strive for. ASW is secondary, the frigates in the outer screen are tasked with that as a primary function.
And I have to ask... what is that milk bottle frame looking thing where the aft radar/directors used to be?
let me tell you why timothy used this setup.
you want to use mk 26 later on. an mk 26 does not fit in the space an mk 13 leaves, which means an redesign of the hull on it's weakest point. basically, this doubles your development cost for the 2nd batch.
here we start looking at the smallest real build mk 26 design: spruance/kidd. the spruance class has in the forward hull an reload system for the ASROC. this space is build that way (or mk 26 is build that way) that the mk 26 mod 0 could be placed in that very same space. it was that much of an fit, that the spruance could even be converted to mk 26 use later on, as was planned originally.
back to your ship. an mk 22 has roughly the same footprint as an 5 inch gun of that era, and the asroc with reload has roughly the same belowdeck arrangements as an mk 26. said simply: your construction could have stayed exactly the same, cutting development costs.... what is exactly the reason for different batches of the same class.
also, the mk 22 could take 16 missiles, which could all be SM-1. the harpoons and asroc (and, as I read somewhere, might even be SM-1) add another 16 weapons in the matchbox and reloader. an total of 32. the mk 26 you later use, takes 24 in mod 0 or 44 in mod 1 configuration. the mk 13 takes 40 but cannot take asroc, and as you don't seem to use harpoon.....
the aft mast is just an 'there is an mast here' thingie, btw
the propulsion. type 42... that gives you 50000 SHP. the large weight might mean even more (this thing is gonna be way bulkier then type 42) so we go for 60000 for now. 2 rolce royce olympus or 3 LM 2500 give you just that..... and the arrangement with 4 gas turbines timothy described somewhere in his previous posts would work too. the type 42 has them all (2 olympus + 2 tyne) centralised in one funnel so one major engine space seems likely. well, if you want to follow that, you'd better throw my funnels overboard and go for one central one (or a large one and an small one, if you want 2) if you want to go with this arrangement, better move the forward one more forward, as right now one large single one still makes a lot more sense, as the engine rooms are so close together or your exhaust pipes take a lot of space. (take an look at the size of the LM 2500 in the belowdeck parts thread, you get what I mean then
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the sidekick was not used until SLQ-32 v3, IIRC. I only mentioned it with the B3 in mind, remember
btw, for an AAW ship you are lacking 3d radars and director range.... for that, look at the brooke class. an better idea IMO would be to focus B1 on ASW instead, as the mk 26 gives you much better AAW cap anyways.