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Nasa: a "helical engine" to reach the speed of light
Engineer David Burns is the creator of the project - ATTACHMENT
A Nasa engineer has devised a latest-generation accelerator called the "helical motor" that can potentially propel a spacecraft "close to the speed of light" without the need for fuel. David Burns, proposed an alternative to the traditional fuel for propulsion of space missiles: a huge propeller-shaped engine powered by a particle accelerator and said: "It could be used for long-term maintenance termination...
AVIONEWS - World Aeronautical Press Agency