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

"If I can make you see the world the way I see it, then you will automatically think the way I think."
- Philip K. Dick

Turnover  
  The point in a torchship's trajectory when it must flip over and point its fiery tail toward its destination to decelerate.  

As far as I know, this is the first use of this term.

Hadley cracked an air valve beside a circular air door. The hiss of entering air crescendoed and died, and then Hadley cracked the door that opened in upon the huge driver tube. With casual disregard for the annular electrodes that filled the tube and the sudden death that would come if the pilot sent the driving voltages surging into the electrodes, Hadley climbed to the top of the tube and used a spanner to remove four huge bolts. A handy differential pulley permitted him to lower the near-exhausted cathode from the girders to the air door where it was hauled to the deck. A fresh cathode was slung to the pulley and hoisted to place. Hadley bolted it tight and clambered back into the ship...


(Differential pulley from 'Off the Beam" by George O. Smith)

"Probably this other thing will go on until we hit an emergency; then we shall prove that old statement about a loaf of bread being the maternal parent of a locomotive.” Channing lit a cigarette, and puffed deeply. “Where do we stand?”

“Thirty hours out,” answered the steward. “About ready for turnover.

Tom Bennington laughed. He was an old-timer, and he said in a reminiscent tone: “I remember when we used to do that on manual. There were as many cases of mal de void during cathode change as during turnover. Autopilots are the nuts — look! We’re about to swing right now, and I’ll bet a fiver that the folks below won’t know a thing about it.”

Technovelgy from Off the Beam, by George O. Smith.
Published by Astounding Science Fiction in 1944
Additional resources -

Here's another quote from Smith’s story:

Forty-one hours later, the Relay Queen made turnover and began to decelerate.

Fans of Robert Heinlein may recall this use from Double Star (1955):

U At turnover we got that one-gravity rest that Dak had promised. We never were in free fall, not for an instant; instead of putting out the torch, which I gather they hate to do while under way, the ship described what Dak called a 180-degree skew turn.

Compare to negative acceleration from Skylark of Space (1928) by E.E. 'Doc' Smith and skew-flip turnover, a masterly mathematical treatment by Robert Heinlein in Have Space Suit - Will Travel (1958).

Comment/Join this discussion ( 0 ) | RSS/XML | Blog This |

Additional resources:
  More Ideas and Technology from Off the Beam
  More Ideas and Technology by George O. Smith
  Tech news articles related to Off the Beam
  Tech news articles related to works by George O. Smith

Articles related to Space Tech
First Ever Proof Of Water On Asteroids
Gigantic Space Sunshade Would Fight Global Warming
Untethered Spacewalk's 50th Anniversary
ESA Designs Huge Inflatable Moonbase

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>

Google
  Web TechNovelgy.com   

 

 

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

Science Fiction in the News

Ulm Sleep Pods For The Homeless
'The lid lifted and she crawled inside...'

Prophetic Offers Lucid Dreaming Halo With Morpheus-1 AI
''Leads trail away from insertion points on her face and wrist... to a lucid dreamer...'

More Like A Tumblebug Than A Motorcycle
'It is about the size and shape of a kitchen stool, gyro-stabilized on a single wheel...'

Tesla Camera-Only Vision Predicted In 1930's SF
'By its means, the machine can see.'

First Ever Proof Of Water On Asteroids
'Yes, strangely enough there was still sufficient water beneath the surface of Vesta.'

Aptera Solar EV More Stylish Than Heinlein Steel Tortoise
'When confronted by hills, or rough terrain, it did not stop, but simply slowed until the task demanded equaled its steady power output.'

Gigantic Space Sunshade Would Fight Global Warming
'...the light of the sun had been polarized by two crossed fields so that no radiation could pass.'

Untethered Spacewalk's 50th Anniversary
'But that space walk of mine wasn't so very amazing.'

ESA Designs Huge Inflatable Moonbase
'It was like being inside a balloon; indeed, that was exactly where he was.'

AlphaGarden Robot Cares For Gardens Better Than Humans
'...a simple clock-set servok with pipe and hose arms.'

More SF in the News

More Beyond Technovelgy

Home | Glossary | Science Fiction Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.