抄録
Viewing from the shortly coming fossil-fuel shortage and the ecological standpoints against the air pollution and the violence of the nature-cycle, it is stressed that liquid hydrogen (LH2) is very important as the secondary energy, especially as the fuel and propellant of Vehicles.
The physical and chemical properties of the LH2 provide the excellent propellant, especially, for the jet turbine and rocket engine. Some models of LH2-propellant engine hitherto developed in U.S.A are outlined.
It must be an urgent necessary to promote the so called “hydrogen economy plan” of LH2 usage as the secondary energy, considering the powerful way of producing D which supports the nuclear fusion, too.
