Could cross-bracing make a 200-gun first rate practical?
Short answerNot really. The structural changes would be immense, and two 100-gun first rates would usually be more flexible and useful than one super-sized ship.
NotesA hypothetical 200-gun first rate would demand so many structural changes that it would be impractical. Even if built, it would concentrate resources in one ship rather than provide the deployability of two 100-gun first rates. Oversized vessels such as Santísima Trinidad could look impressive while remaining difficult to employ effectively. Naval design had to balance concentrated capability against operational usefulness.