Adrian wrote:
The Natural Philosopher ) gurgled happily, sounding much like they
were saying :

Looks like liquid hydrogen is about one third the weight of
equivalent kerosene...guess thats why they power raockets with
hydrogen, and not diesel..

I think that's got more to do with the fact that diesels require air to
burn with, and that's fairly scarce outside the earth's atmosphere...

It's not true anyway, kerosene (diesel) is a fairly common rocket
propellant and was used by both Tsiolkovsky and Goddard, so it's not
like it's a new use of diesel as rocket fuel.