>>64445314
>Surely it will at least be cheaper than Zumwalt, right?
Hahahaha no
From what I can tell at the moment, not every DDG(X) will get hypersonics, those that don't will have 96 VLS cells.
Also while the Mk57 VLS cells do exist, they're designed as peripheral VLS cells, they're not mounted in big dense blocks like the Mk41s, so you'd need a new VLS cell based on the Mk57, but with the installation pattern/layout of the Mk41s, and while the Mk57 cells are physically larger than Mk41 cells, no missile to date has been developed to take advantage of the Mk57 cells (the easiest missile you could do something with would likely be ESSMs as they're quad packed in Mk41 cells, you could likely fit 6 or maybe even 8 ESSMs in a Mk57 cell, but it would require a new ESSM pack to be developed and at the moment it would only be useful for 3 ships, which just isn't worth the $10s of millions required to design, test, validate such a configuration.
And as mentioned the DPM will allow for additional VLS cells. And technically nothing would stop a DDG(X) getting made with 2 DPMs for potentially even MORE VLS cells, you could potentially see 160 Mk41 VLS cells, or 128 Mk41 VLS cells, or 96 Mk41 VLS cells + 12 hypersonic missiles, etc.
Also the peripheral venting for Mk57 cells is a theoretical advantage at best, the only reason it's even potentially necessary is BECAUSE they're mounted on the sides of the ship and are somewhat exposed to incoming fire. Whereas Mk41 cells are mounted in the middle of the deck, it would take a top down direct hit, or a massive hit directly on the side of where the Mk41 cells are for you to be concerned about the munitions cooking off in their cells.