Ask Lemmy

The exact mechanics are never explained, but I’ve always loved “fenestering” in David Zindell’s Neverwhere and Requiem For Homo Sapiens trilogy.

A pilot, in a one-person “lightship”, interfaces with their computer, merging their minds into one. They then solve maths equations which have never been solved before and prove new mathematical theories. This opens up a window underneath the ship, which it falls in to, into hyperspace. They then need to do more novel maths to open up the window to where they’re going and fall through that.

It’s weird and it’s nerdy and it’s poetic and it’s mystical, like everything in the books, and it’s just so incredibly cool.

Does L space in the Discworld novels count?

The Mirrors in Book of the New Sun. Basic idea is to surround yourselves with mirrors until you create an infinity room and then, through 'exactly aligned' lights, the light waves don't cancel out but instead 'push' objects out of the universe, returning at the destination when the light slows down to universal speeds.

the farcaster network built by a machine super intelligence in Hyperion. unbelievable

Slipspace from Halo.

You can weaponize that shit in a pinch if you wish. It seems to be the appropriate FTL method for humanity to use.

Event Horizon… it just had a few downsides.

In the Commonwealth Saga it's trains! It's portals with hugely demanding power consumption. They mostly have to stay fixed to one place and open. So they run choo choos. Their world is commerce and economics. And trains are a lovely symbol of that.

In The Final Architecture it's jaunty. Unspace helps you go fast but you are always alone. Crewmates gone. When you come out they reappear. When you inside there is something coming to get you. Something that lives in unspace and doesn't like that we use it for travel. The terror of its hunting you drives everyone to suicide. So instead they sleep. Magic "you sleep now" pods for everyone.

Except. You can only sleep if you are on a known route. Some rare people can feel out new routes. And they have to say awake. Most shows just follow normal routes. But the special ships with these other folks can go all over the place! At the cost of route terror.

The books are about coming together in the face of adversity cosmic horror. And unspace is a foil to that. You are alone. But we do what we can anyway. Your alone now, but not forever. Unless the monster gets you.

The Drop Drive from Final Space, just because it's so amazingly silly. XD

I thought the Expanse did this really well. For starters, most travel is restricted as we currently know it. They have the Epstein drive, but something like that is feasible. In any case, humans are still meat bags that can only accelerate so much.

But then the FTL component requires some otherworldly technology with gating. That leaves the physics mystery to having been built by some smarter species and I think that is perfect for suspension of disbelief.

So I really like the Stargates. They're a lot more limited/less flexible in where you can travel, but with that limitation comes unique challenges and intriguing stories. The biggest pro about them? It's the fastest form of FTL there is. You can travel literally instaneously to any other gate. And there are innumerable gates to travel to.

But there are a lot of cons too.

Convenience... gates must already be where you'd like to go. The gates are relatively small, unable to fit even a car through, and the gate has a time limit on holding it open so there is limited ability to send large quantitaties of goods through and absolutely no large objects.

Risk... connections are blind, so you don't know what's on the other side until you or a probe goes through and relay back details. And it's a single point of entry, and only one way, so it's easy to be trapped or ambushed on the other side without escape. The gate can also be damaged or have its dialing device missing, disabled or destroyed, making it functionally useless from that end. If your gate is dialed into, the only way to stop anyone from traveling through is with a barrier so close to the wormhole event horizon to make molecules unable to materialize. But even then, they can hold your gate open from their end for the time limit of the wormhole, and then immediately redial and prevent you from using it indefinitely.

Unknowns... Certain anomalies like black holes affecting the destination gate can also pose a cataclysmic danger to planet of the gate of origin. Random happenstance with solar flares can cause the wormhole to travel through time as well as space. Gates may be too far to travel without extra power, and there may not be power available on the other side to get back. Gates can be dialed at random or you may have a list of addresses, but without someone who's been to these gates before, you have no idea who or what you'll find on the other side until you dial it.

The typical use for the gates is cool, but the really interesting stuff is when things go wrong, or when people get really creative with the mechanics. Things going wrong like heading home to Earth but being gated unexpectedly to an icy cave with no exit and no dial device to be found and everyone having to figure out where you went even though none of it seems to make sense. And creative things like overcoming the gates' distance limitations/extra power needs to cross between galaxies by daisy chaining hundreds of them in the void between the galaxies and setting up a macro to pass the matter buffer from one to the next without rematerializing the objects and people within in between.

Of course, traditional FTL ships exist in Stargate, but they are much slower than the instantaneous stargates, and have other dangers associated with them, like other armed ftl ships, pirates, replicators... Most ftl ships in stargate use hyperspace travel, but I believe that the Ancient's inter-galactic stargate seeding ship, Destiny, uses a classic warp drive.

A bunch already here that I like for different reasons but I think my favorite is what they did in the game The Sword of the Stars. Sadly a case of a game with great ideas but only so-so-execution.

My memory on the mechanics might be wrong as I haven't played it for years but basically as a strategy game the fun twist is that every species has a fundamentally different approach to FTL.

You have a Lizard species with basically Star Trek warp drive with fixed speed above light speed from any point to point of their choosing.

Then you have humans that stumbled across naturally occurring interconnect lines between many stars and can travel faster along those routes by comparison to warp drive but have to travel below light speed off of those lines.

Then an aquatic species that doesn't do FTL in the normal sense. They developed teleportation but is it only for short distance. However they are able to get the power requirements down very low and rapidly repeat the process and so they flicker across space and the distance of each step gets longer the farther they are from a gravity well so they travel faster around the outside of something like a galactic cluster than in the middle of it. Reversing the normal pattern of where things get colonized.

And last was an insect species that developed ship size star gates but travels sub light to anywhere new but as long as they bring a gate ship travel is basically instant after that.

And the bonus layer is that since the game has direct ship to ship combat also in the mechanics the difference drive types have trade offs as well like the insects having extremely good combat drives since they don't have ANY FTL systems on their combat ships so it all goes to direction propulsion.

So far it is the only Sci-fi setting I can think of that has so many different ones overlapping not just something like a newer system replacing an older one.

I love the idea that navigators in Dune ripped a line of space cocaine to forsee the best path through folded space for travelling.

Infinite Improbably Drive in Douglas Adams’ Hitchhiker’s Guide to the Galaxy.

What I like about FTL is how it works with the story.

My favourite examples are Elite Dangerous and Dune.

Elite Dangerous's FTL tech is based on alien tech and that allows the developers to do cool stuff that you wouldn't expect in an mmo (this is usually a loading screen so when this first started happening people were terrified).

And Dune's idea of having the entirety of interstellar civilisation dependent on one substance that can only be made on one planet, which also has other uses extremely important to different groups, sets the stage perfectly for what happens in the books.

Warp Drive in Star Trek. Largely because there is modern day physics that points to the possibility of it being an actual possibility.

From a story telling, fits into the narrative version, the FTL in the newer Battlestar Galactica series. Look no further than the Battle of New Caprica. That was fracking awesome.

Farnsworth: These are the dark matter engines I invented. They allow my starship to travel between galaxies in mere hours.

Cubert: That's impossible. You can't go faster than the speed of light.

Farnsworth: Of course not. That's why scientists increased the speed of light in 2208.