4 ms·

Assuming 100% combustion of fuel is not realistic, especially with fusion.

• rbanffy 7y ago
  If the engine manages to get half as much useful thrust out of the fuel, it's still a nice 1g all the way to your destination. Still quite a revolution. How much would be realistic?
  • garmaine 7y ago
    Maybe 2%? That’s based on yields common in nuclear weapons of this complexity. Fusion should be even harder to contain above critical temperatures.
    • rbanffy 7y ago
      Well... I guess even .04 G can be useful... And if we are only fusing 2%, we can bring the reaction to much closer to the ship itself.