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"The planet's immune system is doing everything it can. The planet's immune system is doing everything it can."
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Niven makes good use of this real-life invention in the novel. It is a propulsion method that scoops hydrogen atoms from space via electromagnetic fields, then directs them into a fusion chamber and expels them out the back for thrust.
The emissions of a ramscoop tend to be high-energy hydrogen and helium, lithium radicals, borates, and lithium hydride, producing a purplish flame.
The magnetic field of a Ramscoop is considered to be lethal to living organisms.
The Bussard ramjet design was originally proposed in 1960 by physicist Robert W. Bussard. Among the problems with the original design are
For a look at a propulsion system using a more tenuous fuel source, see light sail, from Sail 25, by Jack Vance.
Compare to these propulsion systems: Light Pressure Propulsion (1867),
apergy (1880),
Beam-Powered Propulsion (1931),
Granton motor (1933),
Vibration-Propelled Cruiser (1928),
geodynes (1936),
ion drive (1947),
Planetary Propulsion-Blasts (1934),
stardrive (1953),
solar sail (light sail) (1962),
Lyle drive (1961),
laser cannon (1966),
Bussard ramjet (1976),
asymptotic drive (1976),
Interstellar Laser Propulsion System (1985). Comment/Join this discussion ( 1 ) | RSS/XML | Blog This | Additional
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Science Fiction
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