The Mars Wheel Family: L4 Relay, Asteroid Refinery, and Orbital Construction Yard

A 50 m diameter, 3. 5 RPM rotating habitat blueprint provides 0. 34 g artificial gravity, 1. 35 MW solar power, and a 10 Gbps laser relay to Mars with 99. 9\, \% availability. Launch mass 15 t; delivered by single Starship. Inter-spoke solar sails enable dual power and optics. Station-keeping: 14 kg propellant over 30 years. Modular Dyneema spokes enable 6-hour repair. The blueprint supports three variants: L4 relay with gravity stopover; asteroid refinery at 2. 8 AU for 1, 000 t/year metal/propellant export; and LEO/NRHO construction yard for 1 Starship per 90 days. Scales via counter-rotating rings to 20+ crew gateway. Radiation: ~500 mSv/yr (GCR, ≈6× ISS annual dose) ; storm shelter: 1 t water. Cost: \150\, M. This work establishes prior art for scalable human infrastructure in cislunar and interplanetary space.