"Even more ridiculous is the notion of them having warp drive or any FTL. In a fluidic space you could never achieve FTL speeds as the medium would never allow one to get anywhere near that speed."
I don't think that is necessarily true. Skipping the issue of FTL/warp capabilities (can't do it in normal space, so who know's how it would work in fluidic space?) , even if fluidic space operated (mostly) on the same physics as our own universe travel into outerspace at sublight speeds would probably be much easier (rather than more difficult) than doing so in the void of space. It would all depend upon the qualities of the "fluid". I think the word "fluidic" misleads people into visualizing 6472 swimming about in a deep ocean. But an atmosphere is also a fluid too. Perhaps fluidic space merely has an atmosphere everywhere -- even in their deepest parts of space. Given the fact that they are a legged and presumably "breathing" creature (rather than a finned and gilled one) this might indicate fluidic space to be more "atmospheric" than "oceanic".
Moreover, if fluidic space is supercooled (as it likely would be in the deeper parts of "space") it could also become a "superfluid" (which is a frictionless fluid), which would eliminate all the limitations aircraft have here on Earth due to friction with air at high speeds. This would likely mean a regular aircraft would work much like space-faring vessel traversing a void does. If our atmosphere were a superfluid, for example, a jet plane would turn off its engines once cruising altitude were achieved, much like a satellite in orbit does, because there would be no atmospheric friction to slow it down (only gravity). Moreover, planes and jets would easily achieve the speeds of space craft -- 10,000's mph.
Also, regular space travel needs both a propellant and a fuel (modern rockets combine these two things into the fuel-propellant they use). An airplane, however, only needs fuel to run its jet, using the atmosphere outside as the propellant. This means conventional spacecraft have to carry an inordinate amount of "stuff" with it into the near-void of space to throw out the back of it to make it move forward. In a super-fluidic space (even one as thin as the atmosphere on Earth), one would only need a fuel to run the engine. Which means a simple propeller or jet engine would suffice for any kind of space travel. This means "space-faring" ships in a super-fluidic space could be fairly tiny in size and thus be that much easier to accelerate to near-light speeds.
...anyway, enough of me babbling. It's actually a pretty interesting discussion point you raised here. Anyone else?
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