Air Logistics & Distributed Industry (Aircraft, Fuel Systems, World Expansion)

This proposal introduces air logistics (rotorcraft and fixed-wing aircraft) as a late-game system designed to enable distributed industry across multiple locations and regions.
Aircraft do not replace trucks, belts, or ships. Instead, they add a high-speed, resource-intensive logistics layer that reduces long-distance infrastructure sprawl while introducing new constraints in fuel, infrastructure, and throughput.
The system supports a transition from a centralized factory to a multi-site industrial network, including expansion into world map regions.