What are your thoughts on using gasoline or diesel and a free-piston linear generator to achieve much better watt-hour/kg ratio (as compared to li-ion batteries), without all of the gas handling and complexity of a hydrogen fuel cell setup?
If we're successful, these airships will be flying for decades to come. The extreme weather this summer and the recent IPCC report has driven home how important it is for new forms of transportation to be zero emission from the beginning.