Science Fiction
Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Latest By
Category:
Armor
Artificial
Intelligence
Biology
Clothing
Communication
Computers
Culture
Data Storage
Displays
Engineering
Entertainment
Food
Input Devices
Lifestyle
Living Space
Manufacturing
Material
Media
Medical
Miscellaneous
Robotics
Security
Space Tech
Spacecraft
Surveillance
Transportation
Travel
Vehicle
Virtual
Person
Warfare
Weapon
Work
"My feeling is that the chance of our surviving into the twenty-first century as working civilization is less than fifty percent but greater than zero."
- Isaac Asimov
 |
| Gravity-Repulsion Generator | ||
| Counters the force of gravity with its own force. |
This is an interesting use of the use of a gravity "generator", because it is only used when leaving a planet or other body. The remaining parts of the journey are accomplished using Newton's Third Law - for every action there is an equal and opposite reaction.
| The power principle by means of which the ship was able to leave the earth was based on the laws of electromagnetic attraction and repulsion, which was called into play on a most powerful scale. Under the tremendous excitation induced by the Lowell gravity-repulsion generator, the force was so great that it drove the space ship away from the earth — just the opposite to the action of gravitational attraction. In fact it seemed to do just that: to reverse the normal attraction of gravitation into a repulsion force. Responding to the enormously powerful electro-magnetic field thus created, the space-ship was able to leave the planet rapidly and at a fast accelerating rate yet did not require the enormous initial velocity of seven miles a second, the critical velocity of escape from a body the size of the earth. This rendered the first upward rush safe and comfortable, for the power of the initial rise could be kept under control to any desired degree. Propulsion in any direction was obtained by the reaction of a highly compressed explosive gas directed from cylinders placed on the various sides of the ship. Once the heavy layers of air were left behind, great velocity could be attained in a short time and in the vacuum of space it would be virtually self-sustaining. |
| Technovelgy from Moon People Of Jupiter,
by Isaac R. Nathanson. Published by Amazing Stories Quarterly in 1931 Additional resources -
|
At last all is in readiness - the great ship lifts off!
The throb and pulse of the mighty repulsion engines sounded louder and louder; the shouts of the multitude outside sounded distantly through the impervious walls of the space-ship. At the final signal, the great repulsion generators roaring deafeningly, the great space-ship began to shiver and palpitate, and began to lift gently upward; and with the roar of the engines turning into the crescendo of an ear-splitting shriek, the "Martian” rose up and up, drove ahead and rapidly disappeared from sight.
Once a great enough distance is achieved, it is no longer useful:
See the many different uses of gravity under "G".
Everything was in readiness; everyone at his post. The last box had been hoisted on board; the last final round of inspection under the critical eye of our commander, the last good-byes; the entrance sealed; the portholes screwed hermetically tight — everything was ready to the last possible dot, before Commander Lowell nodded the signal to start.
In twenty-four hours, as reckoned by our chronometers, the “Martian" was leaving the earth-moon system rapidly behind, our ace having attained a velocity of seven miles per second. The electro-magnetic repulsion engines were long since turned of! and silent, not needed at this great distance...
Comment/Join this discussion ( 0 ) | RSS/XML | Blog This |
Additional
resources:
More Ideas
and Technology from Moon People Of Jupiter
More Ideas
and Technology by Isaac R. Nathanson
Tech news articles related to Moon People Of Jupiter
Tech news articles related to works by Isaac R. Nathanson
| Tumblin' Tumbleweed Rovers To Eplore Mars |
| Tentacled Robot Captures Space Debris |
| Reflect Orbital Sunlight On Demand |
| Elon Musk Wants Data Centers In Space |
Want to Contribute an
Item?
It's easy:
Get the name of the item, a
quote, the book's name and the author's name, and Add
it here.
| <Previous | Next> |
|
|
|
Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Science Fiction Invention Timeline, or see what's New.
|
Science Fiction
Timeline
1600-1899
1900-1939
1940's 1950's
1960's 1970's
1980's 1990's
2000's 2010's
'A broken circle with arrows pointing to a right-hand flow appeared in the chalf.'
'The object seemed melted together like wax — nothing was distinguishable.'
'Midges have many capabilities. To the untrained eye, they look like sparrows.'
'I made disks of my own voice to the number of five hundred very carefully chosen words.'
'His sensors out and working, and the whirring of the tape that sucked up sight and sound and shape and smell and form...'
'It sounds to me as though you had invented a kind of metal earthworm.'
