I know that there 2 warp scales but i really think there is only one scale. The reason is this. In the original series at no time ever was it stated just how fast any warp factor was. simply that it was faster than light. With the exception of warp factor one which was stated to be the speed of light. Now in 1987 Gene Roddenberry states that he wants warp 10 as the absolute speed that the new ship can go. The warp scale that was "official" was actually fan conjecture that was later used by the FASA people as the real warp scale. The TNG creators made the real "official" scale with the creation of the TNG tech manual. Here's where things get scary. In ENTERPRISE they use the warp scale established in the TNG. Hmmm? That is when I decided that since we know they use the warp scale established in TNG in the TNG and also in ENT places 200 years beore TNG that maybe the used it in Kirk's era too. Since nobody in the original series era ever brings this to light it seems logical to assume this series also uses th same scale as the other trek eras. So in conclusionI decided that (at least in my trek universe) there should only be one scale. That it should be the one established by the producers and creators of the the show. So how was the old Enterprise able to go warp 11 in the old show? Easy the Kelvans did modify the ship. Oh yeah then theres "Star Trek V: The Final Frontier"! So need I go on? Below I created a system to help explain how I use the warp scale.
HYPERDRIVE CLASSES
Class velocity (c) distance traveled (per minute in light-years)
20 5.5x10^5 1.0 (just about as slow as they go)
10 1.1x10^6 2.0
7.5 1.6x10^6 3.0
5.0 2.1x10^6 4.0
4.0 2.7x10^6 5.0 (equal to the Quantum Slipstream Drive)
3.0 3.9x10^6 7.5
2.0 5.5x10^6 10
1.0 1.1x10^7 20
0.75 1.6x10^7 30
0.5 2.1x10^7 40 (Millennium Falcon’s top speed on a good day!)
Cost to fit a ship with a hyperdrive is always size of the ship. Setting a course with a hyperdrive requires perfect a hyperspace field parallel phase lock. This ordinarily is accomplished with the use of computer-controlled adjustments using a navicomputer Space Science (Astrogate) TN 10 modified by the ships operations reliability modifier.
SUBSPACE FOLDS (A.k.a. a subspace shortcut.) AND THE (absolute) WARP SCALE (Warp 10+)
Contrary to some sources there is only one warp factor scale. By using “Transwarp” or speeds above warp 10 starships can attain great supraluminal velocities. This is very dangerous to any ship attempting it because of the severe stress placed on the vessel. But by using certain naturally occurring subspace “folds” caused by continual warpdrive interaction with subspace through certain areas in space these folds can dramatically improve a starship’s velocity by taking the shortcut. Folds can only exist where warp drives and subspace interact with each other or subspace has been subjected to stress of some kind thereby causing any ship to sink into a deeper layer of subspace and causing it to be hyper accelerated. This means that in deep unexplored space folds may not be found which is why U.S.S. Voyager NCC-74656 couldn’t use on to return home. Starships with more advanced and more reliable 24th century warp drives can’t exceed warp 10 as they are designed with safety features to prevent subspace or dangerous accelerations beyond warp 10. On older 22nd, & 23rd century starships however these features weren’t available yet. It was not uncommon for such things as anti-matter imbalances or explosions to cause subspace interphase pockets, temporal rifts, or even wormholes to form if the ships warp system was not properly calibrated. On more than one occasion a starship has found a naturally formed subspace fold caused by subspace instabilities of some kind and found itself stuck in a dangerous situation. Using charted natural folds does not require a test. Known folds only exist between systems listed in all capital letters in the star charts. Any ship traveling along this path will be in the subspace fold while in a fold simply double the ships warp factor, i.e. warp 4.99825 (213.5c) would be 9.9965 (9574.18c). The NX-01 did this on her historic maiden voyage to Q’ronos. To find a natural fold have the player make a Science, Space (Astrogation) test, TN 20 (known space), TN 25 (explored space), & TN not possible for (unexplored space). Marginal success is needed to locate one, but only results in the ship losing 1d6 points of structure per minute and shields won’t help. Only a complete success avoids this and Warp velocity is now Warp 10+. The U.S.S. Enterprise NCC-1701 has set several speed records and exceeded Warp 10 reaching Warp 11 on several occasions and once even reaching Warp 14.1. This maneuver however is not under any circumstances safe. If the ships crew decides to try to force the ship beyond warp 10 without a natural subspace shortcut the following test must be made. First to determine if the engines and the ship can take the stresses involved have the engineer make an Engineering (Propulsion), and a Engineering (Structural) test TN 10+ Transwarp factor. Failure in either test results in the ship losing 1d6 points of structure per minute for every warp factor above ten the ship is at. With modifications to the engines and or navigational deflector starship can take the Blind Luck trait.