Has anyone seen a good discussion of "other than internal combustion" power for GA aircraft? My reason for asking is this quote: "Honda claims that their current V-flow fuel cell stack, 100 kW electric motor and Li-Ion battery weigh the same or less than a conventional hybrid powertrain producing less power."

THIS ARTICLE is talking about alternative sources of automotive power, but they are working at about 130HP. If you know of any aviation discussion threads on fuel cell or hybrid power for GA acft, please let me know. You can email me directly at fderfler@gmail.com