The Exploration of SpacePocket Books, 1979 - 237 pagini Presents a nonscientific explanation of space exploration and a view of future life on other planets. |
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Pagina 48
... weight of the trolley . Now let us be more ambitious . Is it possible for the trolley to carry so much propellant ... weight of the trolley -1,280 pounds of bricks in all . Need we stop here ? In theory , no . As long as the final empty ...
... weight of the trolley . Now let us be more ambitious . Is it possible for the trolley to carry so much propellant ... weight of the trolley -1,280 pounds of bricks in all . Need we stop here ? In theory , no . As long as the final empty ...
Pagina 52
... weight to empty - weight ratio on its performance . In each case the empty - weight has been assumed to be the same one ton . The first rocket Figure 7. The Effect of Fuel Weight on Rocket Speeds ROCKET REACHES 3 TIMES EXHAUST SPEED ...
... weight to empty - weight ratio on its performance . In each case the empty - weight has been assumed to be the same one ton . The first rocket Figure 7. The Effect of Fuel Weight on Rocket Speeds ROCKET REACHES 3 TIMES EXHAUST SPEED ...
Pagina 62
... weight , which means that each step will be about twenty times the weight of the steps above . For a one - ton final payload , therefore , the total starting weight is likely to go up in this sort of ratio : Single - step : 20 tons ...
... weight , which means that each step will be about twenty times the weight of the steps above . For a one - ton final payload , therefore , the total starting weight is likely to go up in this sort of ratio : Single - step : 20 tons ...
Cuprins
Preface to the 1951 Edition | 11 |
Thirty Years Later | 15 |
The Shaping of the Dream | 21 |
Drept de autor | |
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acceleration airless already astronautics astronomers atmo atmosphere body bricks build carry certainly Chapter chemical completely conquest of space consider course crew degrees F difficult direction distance Earth energy enormous escape velocity exist exploration extremely fact Figure fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere Jerry Pournelle journey Jupiter landing large number light light-years lunar Mars and Venus Martian means Mercury meteors miles in diameter million minutes missile Moon Moon's motors never normal observed once oxygen payload perhaps planetary planets Pluto possible pounds pressure probably problem produce propellant propulsion Proxima Centauri radar radio reach reason refueling rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spin stars stations surface take-off telescope temperature thousand thrust tion trolley voyage weight weightless