If we do two in every slot that's 72 total beams ignoring the secondary hulls
78 with secondary hulls
Edit how much run time and power can we afford to spend on this? That's what's gonna dictate our battery size and count.
No. We absolutely can't. 35-45 is probably the range we should be looking at. Here's some tentative layouts, I don't think we should go below 4 because that means we're spending more and 36 spaces is a significant part of our remaining space that we probably don't need to spend.
[] Plan Easy 8s
-[] 2 5 gun T1 Batteries at E4
-[] 2 5 gun T1 Batteries at D1
-[] 2 5 gun T1 Battery at B2, 2 5 gun T1 Battery at B2
[] Plan 9 to 5
-[] 3 5 gun T1 Batteries split between radials
-[] 1 5 gun T1 Battery at F4
-[] 1 5 gun T1 battery at C1
-[] 2 5 gun T1 Battery at A1, 2 5 gun T1 Battery at A2
[] Plan 7 is lucky
-[] 3 5 gun T1 Batteries split between radials
-[] 1 5 gun T1 Battery at 5
-[] 1 5 gun T1 Battery at F4
-[] 1 5 gun T1 battery at C1
-[] 2 5 gun T1 Battery at B2
[X] Plan 4 times the fun
-[X] 3 4 gun T1 Batteries split between radials
-[X] 1 4 gun T1 Battery at F4
-[X] 1 4 gun T1 battery at C1
-[X] 2 4 gun T1 Battery at A1, 2 4 gun T1 Battery at A2
9-5 is what I'd consider the upper end of a reasonable PD grid, but Easy 8s has grown on me and we could very easily do a 9-4 that's nearly the cheapest option in terms of space. To better explain what these plans mean; 9-5 is the 3 radials, 2 on each broadside for coverage 1 fore and aft each; Easy 8s is 2 fore, aft, port, and starboard; 7 is 3 radials, 1 each broadside for and aft (the radials should partially cover forward and broadsides); 4 times is literally just 9-5 using 4 gun batteries to save around ~28 spaces worth of runtime and power.
I don't think the Lucky 7s is worth much consideration compared to 4 times the fun- the latter has better placement, costs maybe ~12% more MI, and takes up almost exactly as much space. Easy 8s would probably use the Radials to mount a few aux sensors- we'll want a few even if we can't fit the scientific suite to justify all 10.
Do we have an idea on how many projectors are needed for a 99% kill rate on an incoming torpedo?
The entire idea of these weapons is intercepting projectiles, so we dont need a shitton beyond countering an incoming salvo.
No way in hell these guns havent been tested against our own torpedoes in live fire tests, we should have data. Whatever number of weapons we need to reliably intercept our own, I'd say a 50% to 80% increase will reliably cover us against a foe with markedly better torpedoes.
I think people are getting too hung up on PD as an absolute defense. There's still evasion, and our hull can definitely take a few hits. I imagine a lot of the role of PD is going to be forcing proximity bursts rather than contact detonations in terms of abstractions, because mechanically- it's almost no different than adding to shields.
PD is not like the real world where it must be an absolute defense because any missile is a kill- it's just a layer to be stacked on top of shields, hull, and evasion to reduce the rate of incoming damage.
Edit: It's surprisingly more relevant than I had considered but we can also consider ourselves to effectively have a single extra T1 worth of point defense from the T2s at almost all angles.