Some more thoughts on Reaction vs. Speed drives.
I think Dartz idea about reaction drives could be both the "racing drives" and "economy cargo drives" could work if the "delta-v" of reaction drives is limited because of their need for reaction mass. You can build very fast drives, but you burn through the reaction mass quickly. Or you just accelerate for some time and then coast most of the journey.
Speed drives would be easier to use because they normally don't use much reaction mass at all (or just a little bit for show). But they could be more limited in terms of acceleration and you need to keep them energized the whole journey.
What do you think?
I think Dartz idea about reaction drives could be both the "racing drives" and "economy cargo drives" could work if the "delta-v" of reaction drives is limited because of their need for reaction mass. You can build very fast drives, but you burn through the reaction mass quickly. Or you just accelerate for some time and then coast most of the journey.
Speed drives would be easier to use because they normally don't use much reaction mass at all (or just a little bit for show). But they could be more limited in terms of acceleration and you need to keep them energized the whole journey.
What do you think?