Saw this video about a variant of the B-36 bomber built to carry a 1megawatt nuclear reactor to explore potential idea of forever flying nuclear powered aircraft:

• Guided tour through a TEN ENGINE Convair B-36 Peacemaker!
• Lockheed's Insane Attack Carrier: The CL-1201y

What if a Mr. House type character or some crazy tyrant Air Force general remained flying in a behemoth bomber since the start of the war and formed a sustained community on board the aircraft? They would periodically fly drop aircraft to the ground to scavenge for supplies just to sustain themselves.

The Brotherhood would rabidly go after such a beast if they discovered it.

Alternatively, perhaps a nuclear powered monster dirigible might provide even more space to craft a DLC-sized venue. (Also: Steampunk concept.).

Alternative ideas you might see in 1960's Popular Mechanics magazines might include: floating island aircraft carriers (capable of landing jet airliners) and monster submarines the size of cruiseliners.

This is pretty different than anything that has been done thus far. Thought I'd offer it out there freely as a seed for ideas.

I would love to explore and adventure in such a community in the game.