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"...being predictive, being right about the future, is not the point of any given story or novel. The point is about exploring as wide a range of possibilities as possible."
- Peter Watts
 |
| 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. |
| 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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'I'm afraid to tell you this Mr. Quaid, but you have suffered a schizoed embolism...'
'It drew its power from six square yards of sunpower screens on its low curved roof.'
'...lifted themselves to skimming flight upon whirling helicopters."
'Twenty rocket tugs towed it from its Earth hangar out into space.'
I don't need it to go fast, it just needs to amble along.
'The program raced up the screen one scan line at a time, subtly smoothing, deleting and coloring.'
