The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 19
... thrusts us forwards . It was Sir Isaac Newton who first pointed out ( in his famous and deceptively simple Third Law ) that every action has an equal and opposite reaction . The thrust we produce on the Earth is there- fore exactly ...
... thrusts us forwards . It was Sir Isaac Newton who first pointed out ( in his famous and deceptively simple Third Law ) that every action has an equal and opposite reaction . The thrust we produce on the Earth is there- fore exactly ...
Pagina 29
... thrust of the motor increases by from 10 to 15 per cent . over its sea - level value . In passing , it may also be remarked that a rocket would get no additional thrust if , when it started , the jet impinged on the ground or some other ...
... thrust of the motor increases by from 10 to 15 per cent . over its sea - level value . In passing , it may also be remarked that a rocket would get no additional thrust if , when it started , the jet impinged on the ground or some other ...
Pagina 175
... thrust — indeed , there is a well - known laboratory experiment to demonstrate this . ' With ordinary currents and powers the thrust is negligible , but there is no fundamental reason why such a device should not be developed for ...
... thrust — indeed , there is a well - known laboratory experiment to demonstrate this . ' With ordinary currents and powers the thrust is negligible , but there is no fundamental reason why such a device should not be developed for ...
Cuprins
Automatic Rocket Surveying Mars | 3 |
The Earth and its Neighbours | 9 |
The Rocket | 17 |
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Termeni și expresii frecvente
acceleration already astronautics astronomers atmosphere body bricks British Astronomical Association build carry certainly Chapter chemical completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar involved ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors million minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refuelling return to Earth rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spinning stars stations surface take-off telescope temperature terrestrial thousand thrust trolley Uranus voyage weight