"A propellantless thruster would resolve the issue, but most theorists think that producing accelerating forces without expelling some kind of propellant mass from the vehicle is an idle dream.&q

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"... a vehicle powered by a so-called Mach-Lorentz Thruster [...] could not only make the four lunar trips a day but deliver almost 3000 tons of cargo a year." As long as the theory isn't bu

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"Personal Flight Systems (PFS) has recently been awarded the patent for personal flight using ion electronic air propulsion - a clean technology that has none of the dangerous explosive risks inv

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"What the researcher is proposing is that a spacecraft can be made to accelerate in a direction perpendicular to a magnetic field." Near-future sf writers, take notes.

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"Is this a method for making the kind of lightsail Robert Forward once analyzed as a way of getting payloads and human crews to nearby stars?" I don't know, but I sure hope it is.

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"The so-called ‘electric sail’ would use fifty to one hundred 20-kilometer long charged tethers, their voltage maintained by a solar-powered electron gun aboard the vehicle."

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"Blimps steered by artificial muscles may one day swim through the air like fish, suggest recent flight tests." Old trope, new twist. Any bets on the time-till-included-in-sf-story of this i

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"A device called a Photonic Laser Thruster is making news since a December demonstration of the technology by its inventor, Young Bae." Potential space propulsion innovation.

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"After a decade of work, the first millimeter size turbine engine developed by researchers at MIT should become operational by the end of this summer."

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"...the possibilities of magnetic sails using a different kind of propulsion. Rather than being pushed by photons, a magsail interacts with the plasma of the solar wind."

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"Here is a list of 5 cool coil guns, either one would be fun to try out." Erm, yes ... though it *is* quite cool to see sf-nal weapons can be made in one's garage. The Mundane SF folks shoul

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"Inspired by the sleek and efficient propulsion of squid, jellyfish and other cephalopods, a ... researcher has designed a new generation of compact vortex generators that could make it easier ..

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"Tiny microrobots are under development at Monash University in Australia. A remarkable micromotor will allow them to swim like an E. coli bacterium, which uses its flagella to move around."

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"Humans must colonize planets in other solar systems traveling there using "Star Trek"-style propulsion or face extinction, renowned British cosmologist Stephen Hawking said on Thursday

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"When do you decide to launch a starship? It’s a question based as much on cultural assumptions as technology."

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"As NASA lays plans for travel to the moon and Mars, the agency is exploring propulsion systems, crew modules, and habitat structures [and more]."

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"Driving the ship would be a nuclear arsenal of staggering proportions: 30 million nuclear bombs, each of which would explode 120 kilometers behind the vehicle at intervals of 1,000 seconds."

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"Roger Shawyer has developed an engine with no moving parts that he believes can replace rockets and make trains, planes and automobiles obsolete." A propellant-free propulsion device ... an

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Does what it says on the tin - NASA groundtesting a new thruster design. Sounds like a winner.

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