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"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

Ornithopter  
  Also called a 'thopter, it had adjustable wings and was jet-powered. Describes any plane capable of wing-beat flight in the manner of birds.  

In Dune, science-fictional technologies were set at variance with feudal social systems. A technology which really brought out the fusion between these seemingly incompatible systems was an aircraft called an ornithopter, or 'thopter for short. The wing-beat movement was particularly effective on take-offs.

Paul fastened his safety harness, saw that his mother was secure, checked the aircraft. The wings were at full spread-rest, their delicate metal interleavings extended. He touched the retractor bar, watched the wings shorten for jet-boost takeoff the way Gurney Halleck had taught him. The starter switch moved easily. Dials on the instrument panel came alive as the jetpods were armed.


(Ornithopter from 'Dune' by Frank Herbert)

Technovelgy from Dune, by Frank Herbert.
Published by Putnam in 1965
Additional resources -

Although this quote gives primarily technical details about the aircraft, the winged motion was often used in association with the symbol of the hawk, which was part of the Atreides coat of arms. Here are several quotes that describe its manner of flight:

He broke off as the Duke kicked on the jet brakes. The ship bucked as its tail pods whispered to silence. Stub wings elongated, cupped the air. The craft became a full 'thopter as the Duke banked it, holding the wings to a gentle beat, pointing with his left hand off to the east beyond the factory crawler.


(Ornithopter flight from 'Dune' by Frank Herbert)

Note that the craft was jet-assisted:

The wings snapped back and down, hurling the 'thopter out of its nest. Power surged from the jetpods as the wings locked into lift attitude...


(Ornithopter detail from 'Dune' by Frank Herbert)

Paul fed more power to the jetpods. The 'thopter banked...

Neither the word itself nor the concept were inventions of Herbert's. Da Vinci first described them (with very good engineering diagrams); the first flapping-wing working models were created by Alphonse Penaud in France in the late nineteenth century.

Here's a picture of a "flapwing flycar" from Arthur Radebaugh, the illustrator of the popular newspaper comic “Closer Than We Think”. The Flapwing Flycar appeared in newspapers in 1958.


(Flapwing flycar by Arthur Radebaugh, 1958)

For an interesting real-life look at ornithopters, see Ornithopters In Fact And Fiction. See also Project Ornithopter for more information about them.

The word is also interesting; it is derived from the Greek words for "bird" (ornitho) and "wing" (pter).

In Ringworld, Larry Niven creates a whole other way to fly; see the entry for flycycle, a sort of ultimate flying motorcycle. Also, compare to the bee wing from Slacker's Paradise (1941) by Malcom Jameson.

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Additional resources:
  More Ideas and Technology from Dune
  More Ideas and Technology by Frank Herbert
  Tech news articles related to Dune
  Tech news articles related to works by Frank Herbert

Ornithopter-related news articles:
  - Ornithopters In Fact And Fiction
  - The Dune Ornithopter, Movie And Book

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