> Combined, that is already better than current jet engines. Wikipedia lists the GE90-115B at 10kW/kg, four times better than your SOFC. Did you just combine

> Combined, that is already better than current jet engines. Wikipedia lists the GE90-115B at 10kW/kg, four times better than your SOFC. Did you just combine motor and fuel cell to get 17.5kW/kg? That would be hilarious. > With cogeneration, SOFCs are reaching 80-85% efficiencies That's creative accounting. You're counting waste heat as if it was useful.