Heh. In the spaceship business, "strong" equates to never leaving the launch pad. Rockets are wimpy, generally designed with a 1.4 factor of safety. I kid you not.
That's why water ships are better than space ships; they don't have to operate quite so near their ulimate margins. Can you imagine what people would say if you launched a 5-million-pound water ship to deliver a 30,000-pound payload?
