Microtubular SOFC Drone Powertrain Model

Underwrite 1,000 Wh/kg specific energy microtubular solid oxide fuel cell powertrains burning liquid propane or bio-butane (enabling 8-hour continuous multi-rotor commercial drone flight times vs 30 minutes on Li-ion batteries). Model commercial drone powertrain sales ($18,500/unit), and 15-yr IRR.