Look
here.
The blueprints linked at the top of the page give numbers for maximum speed (0.15c) and endurance (96 hours). The math can be done easily enough. All the other information for Spaceships conversion should be available there as well.
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"When you talk about damage radius, even atomic weapons pale before that of an unfettered idiot in a position of power."
- Sam Starfall from the webcomic
Freefall