Phil,
There's no larger aircraft in 1/350th that I know of, the largest I'm aware of are a Boeing Clipper, a PBM Mariner, and a PBY from Iron Shipwrights in resin.
White Ensign does a bunch of resin planes and helos, and Corsair Armada is releasing alot of new planes from the 50s and 60s, stuff that should be included in the Tamiya or Trumpeter kits, but isn't, and real late war/post war stuff if you wanted to do a pre-SCB Essex from the early 50s.
My brain has been trying to plan out how this would look, and I'm obviously running into problems finding 'standard' museum aircraft, like a Spitfire, P-51, B-17, P-38, etc...in 1/350...obviously, I could do a great naval air museum, with all the Trumpeter and Tamiya stuff...at this point, I'm probably going to scratchbuild everything that I don't have access to...which at this point, includes...
US: B-17, C-47, P-38, P-5, P-47, AT-6, PT-17, Huey
RAF: Lancaster, Spitfire, Hurricane, Wellington, Halifax
Luftwaffe: Fw-190, Bf-109, He-111, Me-262, He-162, Do-335
Japan: Zero, Tony, Frank, Tojo, Jill, Judy, Mavis, Emily
Russia: Yak-1, Mig-3, La-5, Yak-7, Yak-9, Pe-2
So far, here's what I know exists...
US: Corsair, Hellcat, Wildcat, Helldiver, Dauntless, Avenger, Devastator, AD-1 Skyraider, AD-5 Skyradier, Kingfisher, Seagull, F3B, F6C, O3U, F9F Panther, A-4 Scooter, A-5 Vigilante, F-4 Phantom, F-14, F-18, S-3, E2C, A3D, A6, A7, F8, S3B, CH-47, CH-53, H-34, CH-46, Boeing 314 Clipper, PBY, Martin Mariner, B-25, SH-3.
Japan: Betty, Nell, Pete, Norm. If we see an IJN carrier from Trumpeter, then we can expect a Zero, Val, and Kate...
Germany: Ar-196
UK: Walrus, Gazelle, Merlin, Sea Vixen, Scimitar, Sea Hawk, Fulmar, Gannet, Lynx, Swordfish, Albacore, Seasprite.
Russia: Flanker, Fulcrum, Freestyle, Helix
I've been seriously thinking about doing this in 1/700 scale, simply because there's more aircraft out there, but at that scale, it's too small to do any serious detailing...1/144 is ok too, but then it gets too large...so, there's the all the tradeoffs...
Jeff