spaceplane concepts. He proposed a vehicle which would burn hydrocarbon fuel while in the atmosphere and then switch to hydrogen fuel for increasing efficiency
hydrogen or liquid methane fuel) need to be continuously topped off (i.e., boil-off replaced) during the launch sequence (countdown), as the vehicle awaits
Hybrid uses a 1.6 kWh NiMH battery. Burt, Matt. New Mirai hydrogen fuel cell electric vehicle - under the skin (新闻稿). UK: Toyota. 2020-11-30 [2021-04-16]