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Submission + - Fusion Thrusters for Space Travel (

kgeiger writes: John J. Chapman, a physicist and electronics engineer at NASA’s Langley Research Center, envisions a laser-pumped fusion drive. Chapman estimates the drive can produce thrust 40 times more efficiently than existing ion engines such as those on the Dawn mission now exploring the asteroid belt.
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Fusion Thrusters for Space Travel

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Be careful when a loop exits to the same place from side and bottom.