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| ==Introduction==
| | #REDIRECT [[Propulsion in the Re-imagined Series#Faster-Than-Light travel]] |
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| Acronym for <u>F</u>aster-<u>t</u>han-<u>L</u>ight. This is a term used to describe a means of astral propulsion utilized by the [[Cylons (RDM)|Cylons]] and the [[The Twelve Colonies (RDM)|Colonials]]. The standard term for FTL travel is '''"jump."'''
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| The FTL drive makes interstellar travel possible for both the Colonials and [[Cylons (RDM)|Cylons]]. No longer confined to their own home solar system, the Cylons managed to avoid Colonial interference for 40 years after the [[Cylon War]] and establish their own homeworld. However, not all ships -- from small to large -- are outfitted with these drives ([[Miniseries]]). It's likely that FTL drives are not commonplace on many civilian ships because of the costs involved in using and maintaining the drive and the amount of [[tyllium|fuel]] available. For some civilian ships that travel comparatively short distances between some destinations, such as the ill-fated [[Botanical Cruiser]], FTL may simply be impractical or unnecessary.
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| The technology behind FTL systems is such that, providing the relevant data is known, ships can jump with a high degree of accuracy, allowing ships to rendezvous in space and even "park" in a synchronous orbit directly above a given point on a planet's surface ([[Miniseries]]). Proper FTL use even enables vessels to arrive in crowded areas, such as the middle of an asteroid field or other ships, without the risk of collision and damage ([[The Hand of God (RDM)|The Hand of God]]).
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| No specific information on the technology of an FTL drive has been given in the Miniseries or regular series. We know only that ''Galactica'' has two FTL drives, and that other smaller or civilian ships have a single drive. We also know from dialogue that the FTL drives on ''Galactica'' are "spun up", suggesting a use of electromagnetic or centrifugal energies that may serve in creating the fields or forces needed to activate the engines.
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| == Colonial Limitations ==
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| * Colonial FTL systems are not small-scale, and cannot be installed into vehicles such as the [[Viper (RDM)|Viper]]. They can, however, be used on vehicles the size of a [[Raptor]], which is limited to brief, short-distance jumps. Raptors can make a sequence of short FTL "hops" in a row, to reach the same destination as a capital ship with a full-sized FTL drive ([[Miniseries]]).
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| * Colonial FTL systems cannot be used multiple times over a long period of time, for they are prone to breakdown after excessive, repetitive use ([[33]]).
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| * FTL jumps can apparently induce nausea or discomfort in some people, such as [[Cally]] ([[Miniseries]], [[Kobol's Last Gleaming, Part I]])
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| * The wormholes generated by Colonial drive systems are limited in size; this defines the maximum size to which a colonial vessel can be built (hence the need for [[Battlestar|battlestars]] to retract their landing pods and reduce their overall cross-section prior to a jump ([[Miniseries]], [[33]], etc.).
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| * Colonial FTL systems appear to be a holdover from the [[History of the Twelve Colonies#Exodus|Exodus]] from [[Kobol]], and their current designs have been developed to meet the needs of jumping between the [[The Twelve Colonies (RDM)|Twelve Colonies]], as their outposts in other [[Troy|star systems]]. Colonial FTL capabilities have defined limits, referred to as the [[Red Line]], beyond which jumps may not be possible / could result in damage to a vessel's drive system / lead to navigational inaccuracies that might put the ship at risk.
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| * Navigators must be careful to plan FTL jump paths so as not to get too close to planets or other large objects, as they can be dangerous ([[Kobol's Last Gleaming, Part I]]).
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| Knowing the limitations of their own FTL drives, a team apparently led by Lt. [[Felix Gaeta]] successfully refitted a [[Raptor]] with the FTL drive from a captured [[Heavy Raider]] (presumably the one used by [[Kara Thrace]] to return from Caprica in "[[Home, Part I]]"). They later use this drive's data (with the aid of the cooperative copy of [[Sharon Valerii (Caprica copy)|Sharon Valerii]]) to coordinate a squadron of Raptors to fly back to Caprica for a rescue mission to retrieve a [[resistance (movement)|team of resistance fighters there]] ([[Lay Down Your Burdens, Part I]]). Despite the accuracy of the advanced Cylon FTL drive and Valerii's aid in marking the Jumps, two Raptors do not complete the mission. One obtains corrupted Jump data and finds itself within a nebula and a undiscovered [[New Caprica|habitable planet]], and is forced to return to the Fleet. The second Raptor also gets corrupted coordinates and materializes inside a nearby mountain on the final Jump intra-atmosphere into Caprica, with a loss of ship and crew.
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| == Cylon Advantage ==
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| * Cylon FTL systems can be manufactured on a smaller scale to their Colonial equivalent, thus allowing the [[Cylon Raider]] to be outfitted with an FTL drive. ([[Miniseries]]).
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| * Cylon FTL drive systems are far more efficient than their Colonial equivalent. Tests with the Raider captured by the [[Battlestar]] ''[[Galactica]]'' ([[You Can't Go Home Again]]) demonstrated that the drive could enable the Raider to jump directly from the vicinity of [[Kobol]] back to [[The Twelve Colonies (RDM)#Caprica|Caprica]] ([[Kobol's Last Gleaming, Part I]]) - a jump completed by Lieutenant [[Kara Thrace]] during her search for the [[Arrow of Apollo]] ([[Kobol's Last Gleaming, Part II]]).
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| * The extreme ranges over which Cylon vessels can jump would indicate that Cylon navigation systems are far better integrated with their FTL system to enable such long-distance jumps to be accurately plotted.
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| * Given that the Cylons left Colonial space to find their own planet, it is possible that their longer-range FTL capability was created in response to a desire to be able to cover the distance between their adoptive homeworld and those of the [[The Twelve Colonies (RDM)|Twelve Colonies]] with a single jump.
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| ==Background to FTL in New BSG==
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| In establishing the series the creators of the [[Re-imagined|new Battlestar Galactica]] determined to keep everything within the show very "[[Naturalistic science fiction|natural]]". This means steering away from the standard clichés of television science-fiction: no bumpy-head aliens, no remarkable technology such as matter/anti-matter conversion, etc. So how is the concept of faster-than-light travel possible within this precept?
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| ===Underpinning Theories===
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| [[Image:Wormhole-demo.png|thumb|FTL: "Folding Space" (credit: Wikipedia)]]
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| The FTL drive technology used within the [[Re-imagined|new Battlestar Galactica]] appears to be based on the use of [[Wikipedia:Superstring Theory|Superstring Theory]] and [[Wikipedia:M-Theory|M-Theory]] that essentially enable the "jump drive" systems to "fold" space, reducing the distance between any two points by creating a "corridor" through space that links them together (essentially forming a wormhole, or Einstein-Rosen Bridge). Such "corridors" are allowed by the general theory of relativity; what [[Wikipedia:M-Theory|M-Theory]] does is provide a way to change the topology of spacetime dynamically.
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| The use of such Wormholes is based on the tenet that space is curved. Hence the term "[[Wikipedia:Wormhole|wormhole]]", which arises from the analogy that space can be seen as an apple. A worm can travel from one side of the apple to the other in two ways:
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| * By crawling over the surface, or
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| * By burrowing through the apple (creating a "wormhole").
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| Obviously, the second option is considerably shorter than the first.
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| ===Relativistic Acceleration===
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| A key point concerning the use of wormholes within the new Battlestar Galactica, is that they do not break the fundamental limiting factor of our universe: the speed of light. Vessels in the new Battlestar Galactica series do not accelerate to faster-than-light velocities. Rather, they use the wormhole to reduce the distance to their destination, thus giving the ''impression'' of faster-than-light travel.
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| This is the reason why FTL jumps are virtually instantaneous within episodes (e.g.[[33]]). It also means that the only ''direct'' form of propulsion available for vessels is generated by their [[Sublight Propulsion|sublight drive systems]]. In turn, this is why vessels exiting from a jump are seen to be travelling at the same velocity as when they committed to the jump ([[Miniseries]], [[33]], [[The Hand of God (RDM)|The Hand of God]], etc.)
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| ===Feasibility===
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| While the use of wormholes in this manner is not currently possible, work is progressing on superstring and M-Theory which may make the creation of wormholes possible in the future. The limiting factor is the ability to generate negative energy densities, which are allowed (though severely restricted) by quantum mechanics. As such, the use of such systems again meets one of the stated desires of the the producers of the new Battlestar Galactica: not to rely on the "traditional" trappings of science-fiction that require exotic science and technology. Theoretical physicist [[Wikipedia:Kip Thorne|Kip Thorne]] has carried out extensive research into wormholes, and helped develop a scientifically-consistent means of wormhole travel used by [[Wikipedia:Carl Sagan|Carl Sagan]] in his novel [[Wikipedia:Contact (novel)|"Contact"]] which bears a remarkable similarity to the technology employed within Battlestar Galactica.
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| ==Jump Calculations==
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| Based on deduction from information gleaned in [[Scattered|Scattered]], a set of Jump Coordinates used to execute an FTL-Jump "tells" the Jump Drive to fold space along a vector of three dimensions:
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| *Elevation
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| *Rotation
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| *Distance
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| Here, the dimension of Distance would represent more than just a straight line, plotted through three-dimensional space but the amount of space curvature that the jump drive would have to fold.
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| A possible algorithm for jump calculations would therefore necessitate first and foremost the figuring out of the exact location of the ship, relative to its intended point of arival after the jump. This is done by identifying, fixing and triangulating several stars. {{ref|tigh}}
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| Next, the ship´s position relative to the intended point of arrival would be [[Wikipedia:Point plotting|plotted]] on a three-dimensional [[Wikipedia:Cartesian coordinate system|Carthesian coordinate system]], using the ship as its [[Wikipedia:Origin (mathematics)|point of origin]], i.e. (0/0/0).
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| Then, the positions of any known stellar bodies and other obstacles would have to be plotted on that coordinate system as well, in order to establish where to jump and where ''not'' to jump.
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| Finally, the point of arrival would likewise be plotted. The hard part in making a single jump over long distances, like to Ragnar in the Miniseries, would therefore lie not so much in getting the jump drive to fold space correctly, as in correctly figuring out where possible obstacles, such as a sun or a black hole, are located and then adjusting the direction of the jump accordingly, so as to land the ship in a clear volume of space.
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| ==What happened in "Scattered"?==
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| In "[[Scattered]]", [[Galactica (RDM)|''Galactica'']] and the [[The Fleet (RDM)|Fleet]] executed jumps according to different sets of coordinates. As a consequence, ''Galactica'' had to jump back along its original jump vector, to the former point of origin of the two jumps, reacquire the former starfixes and calculate a best-fit solution given the Fleet´s current position.
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| At first glance, this seems counter-intuitive. Since presumably both sets of jump coordinates were known to ''Galactica'', a simple triangulation of the two jump vectors would have produced a third set of jump-coordinates which should have allowed ''Galactica'' to jump to the Fleet directly.
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| A possible explanation for the complications that arise in such a case may lie in the [[Wikipedia:General Relativity|"Curvature" of space]] and the fact that ships retain their initial velocity through a jump{{ref|velocity}}.
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| Space is not flat, but distorted by stellar masses, especially [[Wikipedia:Sun|Suns]] and [[Wikipedia:Black holes|Black Holes]]. Assuming that FTL Jumps cover enormous distances, the above the two different jumps would place lots of unknown stellar bodies between ''Galactica'' and the Fleet, distorting space and thereby screwing up the dimension of „Distance“ in the above mentioned third set of jump-coordinates.
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| So in order to find the Fleet, ''Galactica'' had to jump back to the point of origin of their last jump, reacquire the Fleet's set of [[Emergency Jump Coordinates]], i.e. figure out where the Point of Origin of these coordinates was ''and'' how to orient the coordinate system used to define these coordinates. This would ensure that ''Galactica'' took approximately the same route as the Fleet did, thereby passing the same stellar bodies along the way and ending up in the vicinity of the Fleet.
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| ==Notes==
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| # In the [[Miniseries]], Colonel Tigh gives the impression that an FTL jump hasn't taken place in some 20 years and would be inadvisable. Given the preponderance of ships with FTL drives (some 63 comprising the suriving Colonial fleet alone ([[33]]). Tigh was probably referring to the last time ''[[Galactica]]'' herself made an FTL jump.
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| #{{note|tigh}} This much is explained by Col. Tigh to his wife Ellen in „Scattered“.
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| #{{note|velocity}} This can be seen in the Miniseries immedeately after Galactica jumps to Ragnar.
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| [[Category:A to Z]]
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| [[Category:RDM]]
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| [[Category:Technology]]
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| [[Category:Terminology]]
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