Constitution class project begins, spawning a series of similar ships that develop in parallel
2245
Enterprise launched, Dreadnought undergoing initial design phase
2250-2255
Federation class dreadnought designs submitted; final design locked in 2255
2255
Second batch Constitutions launched
2260
First dreadnoughts finished; meet success in their limited roles.
2261
Dr. Eugene Wesley makes 10-domain discoveries
2262
Transwarp work begins; group comes to call itself the 'Excelsior Group'
2266
Starfleet Command begins to see the need for a new, well-armed, multi-purpose advanced starship to supplement and eventually replace the aging Constitution class also capable of fulfilling the role of the limited-capacity Federation class dreadnoughts. Meanwhile, design work begins on a total refit for the Constitution class.
2267
Original TDP due date, extension granted
2268
Stardate 5693, Defiant Incident, resulting in interphase breakthroughs in the TDP
2270
Enterprise returns from 5-year mission; Starfleet announces fleetwide modernization and revitalization refit plans for vessels ranging from the Constitution class to the Miranda class.
2271
Federation Council and Starfleet review and approve TDP to be included on SV-20.
2273
V'Ger incident
2275
Adm. Morrow becomes CinC, heralds new vessel and gives it the name Excelsior.
Excelsior designs finalized, approved. Starfleet places orders for six Excelsior class ships, three (including the prototype Excelsior, NX-2000) to begin construction immediately. The second Excelsior is planned to be the next Enterprise (NCC-2007).
2276
Construction of Starship Excelsior begins at San Francisco Fleet Yards. Other components under work include the transwarp core at Jupiter Station, transwarp nacelles at Copernicus Yards, Luna, and modular components at Utopia Planitia.
2277
Frame construction underway.
2278
Montgomery Scott rejects offer to become an engineer on the TDP
2279
Test core installed; USS Constellation launched.
2280
Computer core installed; functional t/w core installed; aux reactors installed, on-line
2281
Computers at 84%, AI becomes self-aware within the year; transwarp core begins primary testing; bridge module locked; stardrive section nears completion
2282
Primary hull complete, habitat modules installed; bridge module brought online; computer programming underway; outer hull work nears completion
2283
Transwarp core at Review Three, 80% peak; ship becomes self-sufficient; impulse passes R3; all other systems finally reach R3 shortly afterward.
Starship Enterprise retired to Sol System as Academy trainer.
2284
On the Earth-Jupiter run, all systems but transwarp pass Review Four.
Stardate 8104.5, Comissioned (August 2); Captain Styles takes command and gives a publicity tour to the media and Starfleet officials. Initial flight reviews begin within the Sol System.
2285
Calibration of transwarp core continues, flight tests scheduled to begin soon.
Starship Enterprise officially retired after damage in a battle with the renegade Khan Noonien Singh. Enterprise is shortly stolen and Captain Scott sabotages Excelsior to prevent pursuit; results in nearly six months of refit for Excelsior.
2286
Speed trials soon prove disastrous; three sets of nacelles and two cores are attempted; the first core ruptures and is ejected, and the second is successfully shut down before breaching. Excelsior is trapped idle in dock during the Whalesong Crisis.
For saving the Earth, Starfleet rewards James Kirk by renaming the Constitution-class Yorktown as Enterprise 1701-A, and changing the second Excelsior?s name to Yorktown. The next Enterprise is scheduled for construction and launch by 2293, to coincide with the current vessel?s projected date of decommissioning.
2287
Transwarp experiments are finally deemed a failure. Rather than scrap the costly and otherwise successful Excelsior, Starfleet makes the widely unpopular decision to refit her with conventional warp drive. Construction begins on the next two Excelsior class ships.
2289
Excelsior re-launched and undergoes second shakedown, certified for duty.
2290
Captain Sulu is assigned to command Excelsior. He selects Lt. Cmmdr. Janice Rand as his communications officer. Excelsior begin three-year mission in Beta Quadrant 'cataloging gaseous anomalies,' which is really an excuse for increased presence near the Klingon and Romulan empires.
U.S.S. Yorktown, NCC-2007, is launched and begins shakedown. Construction proceeding on the next Enterprise, including several upgrades designed to cure the Excelsior of particular design quirks.
2291
Yortkown begins a three-year mission.
2293
Khitomer Incident. Excelsior returns from her three year mission and undergoes refit. Enterprise-A is decommissioned. Soonafter, the Enterprise-B is commissioned.
2294
Excelsior and Enterprise-B are launched on new five-year missions. Construction proceeding on the final of the first six Excelsiors.