The last ship model I built was the USS Arizona. moving turrets & all. Added some planes to that, like the B-26 Invader. Pop being a Seabee in the Philippines, said the B-26's hit the deck at 180MPH. Impressive for a prop job, but an engineering nightmare for him & the boys on them small islants, as he called them.
As for myself, I'm restoring a Crosman Model 160 Pellgun, variant one from 1955-1956, first model run. Since they changed it for the 1960-1971 model change, the original diagrams were destroyed!? It's been a nightmare finding parts & service gunsmiths specializing in antique airguns, let alone a certain brand. Quite the surprise to find out it's been a new, very popular thing with shrinking hunting lands. Governments, local, county, etc want ballistics profiles for hunting where muzzle velocities fall off quicker than the usual firearms. So my airguns- high powered " magnum" airguns-are legal to hunt with above some 600FPS muzzle velocity. Small game up to turkeys. Cha-Ching...Gotta stain the stock this weekend & start oil finishing it. then re-blue the metal parts, screws & all.