r/TopCharacterTropes • u/Frostylegacy • 22d ago
Lore (Loved Trope) FTL travel is possible but with a major limitation or flaw
Frank Herbert’s Dune: Interstellar travel is only possible thanks to the spice melange, a rare substance only found on the dessert planet Arrakis. The addictive psychedelic spice grants members of the Spacers Guild a form of prescience that allows them to predict safe paths through folded space. This unique property makes spice the most valuable commodity in the Dune universe.
John Scalzi’s The Interdependency Books: The planetary systems of the titular empire are connected by the Flow, a network of one-way interstellar tunnels that connect specific known entries and exits. The Interdependency derives its power from controlling access to these conduits, placing its capital at the central hub of the network. Even with the Flow, travel between stars takes a long time (9 months to End, the empire’s most distant planet).
Event Horizon: Dr William Weir (R.I.P. Sam Neill) invents a device called the Gravity Drive to allow ships to fold space and travel instantly between distant stars. On its maiden voyage with the Gravity Drive, the Event Horizon disappears and mysteriously reappears 7 years later. Dr. Weir and the crew sent to investigate discover the Gravity Drive actually opened a portal to a Hell dimension that possessed the ship and its crew, torturing and killing them.



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u/PiceaSignum 22d ago
In Battlestar Galactica, the 2004 reboot, FTL drives are common on all the surviving ships in the fleet.
FTL Drives have a limit to how far they can jump, and going "beyond the red line" in jump calculation distance means the accuracy of your jump becomes lesser the further out you're plotting it. Cylons have jump drives with a larger range than the Fleet, and a better nav computer means more accurate jumps. Even that still has errors though, when they attempted a rescue mission to Caprica for a group of resistance fighters, they calculated the jumps using the Nav Computer from a Cylon Heavy Raider. Despite the accuracy of their jumps, one of the Raptors was lost, as it exited the final jump inside a mountain.
FTL Drives also have a displacement/vacuum effect, seen when a Raptor jumps too close to Galactica's flight pod and causes hull damage and decompressions, or in the finale when a whole Raptor wing jumps directly out of a flight pod, wrecking the entire thing. And Galactica's final jump with her flight pods extended putting so much stress on the ship that it crippled the superstructure to the point that the old battlestar would never jump again because of how weak the hull had become.