![]() ![]() ![]() “The engine itself would be able to get to 99 per cent the speed of light if you had enough time and power,” says Burns. For that reason, the engine would only be able to reach meaningful speeds in the frictionless environment of space. It would also need to be big – some 200 metres long and 12 metres in diameter – and powerful, requiring 165 megawatts of power to generate just 1 newton of thrust, which is about the same force you use to type on a keyboard. Discover more about NASA’s missions: Explore four NASA space centres on a New Scientist Discovery Tour Frictionless space
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