Oh man, why do you have to be such a downer dcl?
The more you get me thinking about it the more I start to realize you may be right. My thought process was that we could take advantage of the different speeds the outsides surface area and internal volume would increase as we built bigger and bigger ships. Assuming we build it big enough we could make something with more than enough room for fuel to make up for the mass, but then I got to thinking about what you could possibly use to actually build a ship that massive.
I was about to post a reply talking about how with enough volume you could counteract all the extra mass, then I scrapped it all when it dawned on me that you'd probably need much stronger materials that what's currently available to build something that large and massive.
