The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 24
... important example , is considerably more complicated but also capable of much higher performances . Instead of using solid propellants stored and burned in the same container , it uses liquid fuels which are kept in separate tanks and ...
... important example , is considerably more complicated but also capable of much higher performances . Instead of using solid propellants stored and burned in the same container , it uses liquid fuels which are kept in separate tanks and ...
Pagina 26
... important rôle in the conquest of space , since almost certainly the first spaceships will be purely automatic - and thus expendable . The " exhaust speed " of modern liquid - fuelled rockets is of the order of 5,000 m.p.h. or even ...
... important rôle in the conquest of space , since almost certainly the first spaceships will be purely automatic - and thus expendable . The " exhaust speed " of modern liquid - fuelled rockets is of the order of 5,000 m.p.h. or even ...
Pagina 45
... important difference that whereas the shell acquires its velocity in a few feet under an enormous acceleration , the spaceship has thousands of miles in which to build up speed at a rate which human passengers could withstand . Still ...
... important difference that whereas the shell acquires its velocity in a few feet under an enormous acceleration , the spaceship has thousands of miles in which to build up speed at a rate which human passengers could withstand . Still ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
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able acceleration actual already appear astronautics astronomers atmosphere atomic become body build carry certainly Chapter close completely consider considerable course deal developed difficult direction discovered discuss distance Earth effect energy escape exist exploration extremely fact fall field Figure fuel give given gravity greater heat human hundred idea imagine important impossible increase interesting interplanetary involved journey known landing least less light limit live look lunar Mars material matter means miles minutes Moon motors necessary never observed once orbit oxygen perhaps period planets Plate possible practical present pressure probably problem produce purely radio reach reason relatively remain rocket round satellite scientific seems seen ship shown simple Solar space spaceship speed stars stations structure surface telescope temperature thousand Universe velocity Venus weight whole