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"The best fuzzy rules, the best knowledge, deal with the turning points of the system. If a race-car driver teaches you how to drive, you don't need him to show you how to drive on the straightaway. It's how he handles the curves that matters."
- Bart Kosko
 |
| Reaction-Motors | ||
| A spacecraft engine that works by firing matter out at high speed. |
This idea makes use of conventional physics.
| For three days Captain Grant had kept his great space-liner… ahead of the questing disintegrator rays of the Black Hawk only by burning his full battery of reaction-motors at their maximum power. |
| Technovelgy from Twelve Hours To Live,
by Jack Williamson. Published by Wonder Stories in 1931 Additional resources -
|
Here's what the drive looked like in operation:
The glow, he knew, was a fluorescent, electronic discharge in the radioactive gases jetting from the rockets of the racing ship...
The idea behind a reaction-motor is Newton's Third Law of Motion, which decrees that for every action, there is an equal and opposite reaction. For a spacecraft to move forward, you must throw matter out the other end.
Compare to the reactionless drive idea, which encompasses the various hyperdrives that allow a ship to move from one point to another in space, without traversing the space in between. See the inertialess drive from 'Doc' Smith's 1934 novel Triplanetary.
…Grant saw a vague pink glow come into being in the jet, star-sprinkled sky behind…
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| Tumblin' Tumbleweed Rovers To Eplore Mars |
| Tentacled Robot Captures Space Debris |
| Reflect Orbital Sunlight On Demand |
| Elon Musk Wants Data Centers In Space |
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'Across the ground something small and metallic came, flashing in the dull sunlight of midday.'
'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.'
