This paper presents a comprehensive economic analysis of the F-35X Heavy-Lift Slip-Ship, a 5x-scaled blended wing-body orbital transport utilizing westward rotational frame decoupling. Drawing on cost benchmarks from fighter aircraft (F-35), heavy cargo aircraft (Boeing 747, Antonov An-225), and reusable launch systems (Falcon 9, Starship), we derive development, production, and operational cost models. The analysis demonstrates that the F-35X achieves a cost-to-LEO of 27. 89/kg at conservative utilization rates—representing a 100x reduction compared to expendable systems and approximately 2. 4x improvement over projected Starship costs. Full reusability with aircraft-like turnaround transforms the economic structure from hardware-dominated to operations-dominated, enabling orbital logistics at cargo aircraft economics.
Matt Webb (Sun,) studied this question.