High Quality Content by WIKIPEDIA articles! A fusion rocket is a rocket that is driven by fusion power. The process of nuclear fusion is well-understood and recent developments indicate this technology may be able to provide terrestrial based power within 30 years.[citation needed] However, the proposed reactor vessels are large and heavy, making them unsuitable to use on spacecraft in the foreseeable future. A smaller and lighter fusion reactor might be possible in the future when better methods have been devised to control magnetic confinement and prevent plasma instabilities. For space flight, the main advantage of fusion would be the very high specific impulse, the main disadvantage the (probable) large mass of the reactor. In addition, a fusion rocket may produce less radiation than a fission rocket, reducing the mass needed for shielding. The surest way of building a fusion rocket with current technology is to use hydrogen bombs as proposed in Project Orion, but such a spacecraft would also be massive.

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