The 1980,1990s

――１９８０'s
「In the 1980s, what kind of rocket was developed?」
「≪ H rocket ≫ which was an inheritor of the N rocket which I introduced a while ago was developed.」
「Oh, it is ...It is the strange name!」
(c)JAXA

「At first I introduce ≪ H-I rocket ≫. As for this rocket,
it was planned to launch a man-made satellite of around 800 kg.
」
「800 kg, it are weight of approximately eight doctors...」
「...」
「However, a debate happened about the first step of this rocket.」
「Why?」
「That you develop a rocket newly is the debate that you just use the N rocket for.」
「 Isn't it better to develop newly? 」
「No, then I am delayed for a plan.」
「Then you should use it towards N rocket.」
「No, then I cannot fly 800 kg of things.」
「Yes..... Well, how did you do it after all?」
「As H-IA rocket, they used the thing same as N rocket.」
「 Did it make B that there was A?」
「No,it didn't.」
「Why?」
「It developed ≪ H-II rocket ≫ in substitution for it.」
「Also tell me about it」
「All right, 」
――１９９０'s

(c)JAXA

「The ≪H-II rocket plans a domestic technological change,
and is high; is reliable.It was developed to enable low-cost launching.」
「It is only difficult words.」
「To put it simply, it can make a part in the country and can launch it surely.
It means that it does not cost money besides.」
「It is a great greedy.」
「However, something is important. It couldn't be helped.」

「Furthermore, this rocket used the first fuel in the world.」
「What kind of thing is it?」
「It is liquid hydrogen and liquid oxygen. After having burnt it if I use these, only steam is generated.」
「What do you mean?」
「It does not have adverse effects to the ozone layer and does not hurt environment.」
「Oh,!it is so!」
「It means that it is kind to the earth.」
「Japan used it for the first time in the world, Japan is great!」
「That's correct.」


To the 1970｜To the 2000