“…Should future large-scale production technology of hydrogen, based on thermochemical or electrolytic methods coupled to inexhaustible energy resources such as solar or advanced nuclear reactors materialize, then the economic viability of hydrogen as a transportation fuel vis-a-vis hydrocarbon-based fuels, will change. A recent energy balance and economic comparison of a hydrogen powered car vs. an electric car, internal combustion engine and hybrid systems, has been prepared by Exxon Research and Aircraft applications of hydrogen have also been extensively reviewed in (1), (25), (28), (34), and (35) and (40). Basic observations made regarding the use of hydrogen in ground transportation also apply for aircraft applications, though in a less severe fashion.…”