posted on Jan, 26 2009 @ 05:19 PM
Sorry to resurrect an old thread, but I found this while searching for this exact same topic. There are a few spin-off web series based on the
SeaQuest DSV universe. Now, the performance characteristics of said "Subfighters" is grossly in excess of what they would actually be, but they used
an "advanced" kind of hydrojet. I'm not sure how much better than normal underwater propellars that would be, but I think the difficulties of
creating supercavitation for something the size of a subfighters (if you assume it's a similar size to, say, a small aircraft) is quite difficult.
Let's also remember that speed is relative to how fast everything else can go underwater, and just because you have weapons which can outrun the
craft you're in, doesn't mean you necessarily don't bother building the craft. Afterall, in the early days of military aviation, did they say "oh,
hell, we shouldn't even bother building aeroplanes for use in combat because they couldn't possibly break the sound barrier and bullets can"? Of
If a subfighter had a well defined role to play, then it would be built. It's not at all technically unfeasible, as it could easily use a combination
of ballast and hydrofoils (let's not forget that water is a fluid just like air and so lift still applies; it could be used in the opposite
direction), and as for crush depth it would probably be used for things in shallower water, leaving deep sea missions to larger vessels. It could
carry torpedoes the same way that some more modern fighters (i.e., the F-22) carry their ordinance (in a closed bay; in this case torpedo tubes built
into the fighter), or even use guns firing supercavitating bullets (although this is much more difficult than just using torpedoes; perhaps you could
design miniature torpedoes that could be fired from the thing?). All this is entirely possible within the foreseeable future (there isn't really any
sci-fi to the tech). The problem with the concept is in the role it would play. If it has no role, it won't be built. There would be no point.
On a side note, this type of technology would probably only be developed if there was extensive ocean colonization, as there was on SeaQuest DSV.