Cochrane (unit)

The cochrane was the unit of subspace distortion, named after Zefram Cochrane, the inventor of warp drive on Earth. The phase fluctuations in subspace fields were known as Cochrane distortions. (TNG: "Ménage à Troi")

Comparative list of subspace distortion

Picocochrane = 0.000,000,000,001 cochranes

• In 2381, Ensign Sam Rutherford increased the power output of the Tucker tubes by 7 picocochranes (LD: "I Have No Bones Yet I Must Flee")

Millicochrane = 0.001 cochranes

Millicochrane was one of the vocabulary words listed on the chart "A Tunnel in the Sky". This chart was seen in the schoolroom aboard Deep Space 9 in 2369. The subspace distortion caused by the Bajoran wormhole was measured in millicochranes. (DS9: "In the Hands of the Prophets")

• 1 millicochrane: Ensign Sam Rutherford's effort to improve transporter efficiency left transported subjects off by one millicochrane, in a partially phased state, producing an audible trilling noise. (LD: "Much Ado About Boimler")

• 24 millicochranes: A sign in Doctor Paul Manheim's laboratory on Vandor IV stated that Federation Science Council Regulation 5244 had to be observed at all times when the facility was in use, further regulating that all operational equipment had to be rated for 24 millicochranes or greater. (TNG: "We'll Always Have Paris")

Several signs with this warning were seen close to the antimatter storage in the lab. The text was not legible on screen though.

• 39.1 millicochranes: When the USS Enterprise-D was hit by a quantum filament in early 2368, it experienced a "+39.1 millicochrane containment field transient event". (TNG: "Disaster")

• 87 millicochranes: While conducting repairs, after the Klingons sabotaged the warp drive of Enterprise NX-01, locking the ship in at warp 5, the ship's field variance was at 87 millicochranes. (ENT: "Divergence")

• 288 millicochranes: In a transwarp topologic analysis, the net external subspace transwarp distortion of a transwarp conduit aperture, used by the Borg, fluctuated between 30 and 288 millicochranes. (TNG: "Descent", computer screen)

• 312 millicochranes: According to the Enterprise NX-01 database, when restarting the warp five engine reactor of the ship, the output had to be confined to within 300 and 312 millicochranes to prevent fusion of the dilithium matrix, unless the spatial compression index was greater than 5.62 percent, or the ship was within two parsecs of a class C gravimetric field distortion. (ENT: "Doctor's Orders")

• 408 millicochranes: A geodesic fold created an output of verteron energy of 408 millicochranes. (VOY: "Inside Man")

The display graphic supporting this reference gives the abbreviation for millicochrane as being "mC".

• 750 millicochranes: Federation Type 15 shuttlepods were equipped with two long-range 750 millicochrane impulse driver engines. (TNG: "Descent")

The Star Trek Encyclopedia, 4th ed., vol. 2, p. 42 defined millicochrane as "one one-thousandth of the force necessary to establish a field of warp factor one."

Cochrane

• 1.25 cochranes: Federation Type 6 shuttlecraft were powered with two 1,250 millicochrane warp engines. (TNG: "The Outcast")

• 2.048 cochranes: A graphic of the warp bubble in which Beverly Crusher was caught in 2367, revealed that it had a scan enhancement of 2,048 millicochrane FFT. (TNG: "Remember Me")

• 3.695 cochranes: Wesley Crusher's static warp bubble was roughly stable at 1,283 × 3,695 millicochranes. (TNG: "Remember Me")

• 4.562 cochranes: Metaphasic shield program 1, created by Geordi La Forge, employed aboard the USS Enterprise-D in early 2370, involved a steady increase of the subspace compression factor of the shields, which corresponded in the decrease of the field distortion from 4,562 to 4,513 millicochranes, after which the metaphasic field was engaged. (TNG: "Descent, Part II" display graphic)

• 22 cochranes: After B'Elanna Torres had removed nearly all Borg technology from the warp core of the USS Voyager in early 2374, the matter-antimatter reaction was measured at 22 cochranes and rising. (VOY: "The Gift")

• 39 cochrane: A Jem'Hadar attack ship created a 39 cochrane warp field. (DS9: "A Time to Stand")

• 500 cochranes: A new plasmadyne relay that Geordi La Forge created in late 2370 was able to withstand over 500 cochranes of warp field stress. (TNG: "Journey's End")

Kilocochrane = 1 thousand cochranes

• 4.077 kilocochranes: The anti-time subspace distortion that appeared in the Devron system had a distortion in the range of 4,077,000 millicochranes. (TNG: "All Good Things...")

4077 was a reference to M*A*S*H.

• 30 kilocochranes: A technique tested by Dr. Lenara Kahn used for creating artificial wormholes in 2372, required the USS Defiant to generate a subspace tensor matrix in the 25,000 to 30,000 cochrane range, and then sending out a magneton pulse using a target drone. (DS9: "Rejoined")

Teracochrane = 1 trillion cochranes

• 2.9 teracochranes: The opening of a Borg transwarp conduit produces subspace disruptions with a field magnitude exceeding 2.9 teracochranes. (VOY: "Dark Frontier")

Petacochrane = 1 quadrillion cochranes

• 20 petacochranes: Tri-cobalt devices used by the USS Voyager to destroy the Caretaker's array in 2371 had a yield of 20 petacochranes. A cochrane distortion of this scale was large enough to create a subspace tear. (VOY: "The Voyager Conspiracy")

See also

• Cochrane Equation

Background information

Non-canon comparative list of subspace distortion

Nanocochrane = 0.000,000,001 cochranes

• 5.26 nanocochranes: The field differential within the inertial damping force field of a Galaxy-class starship was 5.26 nanocochranes per meter. (Star Trek: The Next Generation Technical Manual, page 24)

Microcochrane = 0.000,001 cochranes

• 20 microcochranes: The goal maximum amount of subspace flux differential to be allowed to occur within the habitable volume of a Galaxy-class starship was 0.02 millicochranes, when the development of the class began. (Star Trek: The Next Generation Technical Manual, page 3)

Millicochrane = 0.001 cochranes

• 75 millicochranes: The average force field strength of the inertial dampening field of a Galaxy-class starship inside the habitable volume of the ship was 75 millicochranes. (Star Trek:The Next Generation Technical Manual, page 24)

• 150 millicochranes: The output of the amplifiers used in the inertial damping system of a Galaxy-class starship was 150 millicochranes. (Star Trek: The Next Generation Technical Manual, page 24)

• 180 millicochranes: The minimum output goal for an impulse drive driver coil, when operating in the temperature of 10.2 million Kelvin, for the Galaxy-class starships was 180 millicochranes, when the development of the class began. (Star Trek: The Next Generation Technical Manual, page 2)

• 250 millicochranes: The output of the amplifiers used in the structural integrity system of a Galaxy-class starship was 250 millicochranes. (Star Trek: The Next Generation Technical Manual, page 23)

• 450 millicochranes: The output of the amplifiers used in the main tractor beam emitters of a Galaxy-class starship was 450 millicochranes. (Star Trek: The Next Generation Technical Manual, page 89)

• 500 millicochrane: 500 millicochrane impulse driver engine was the classification of a nacelle of the Type 15 and Type 15A shuttlepod. (Star Trek: The Next Generation Technical Manual, page 160)

This would contradict the energy signature screen from "Descent"

• 550 millicochranes: The output of the amplifiers used in the navigational deflector of a Galaxy-class starship was 550 millicochranes. (Star Trek: The Next Generation Technical Manual, page 87)

• 625 millicochranes: The output of the amplifiers used in the deflector shield system of a Galaxy-class starship was 625 millicochranes. (Star Trek: The Next Generation Technical Manual, page 138)

• 750 millicochrane: 750 millicochrane impulse driver engine was the classification of the nacelle of a type-16 shuttlepod. (Star Trek: The Next Generation Technical Manual, page 160)

Cochrane

• 1 cochrane: Under the conditions where a 1 cochrane warp field achieves warp factor 1, approximately 20 gigajoules are required to create the field, and only 200 megajoules to maintain it. (Star Trek: The Next Generation Technical Manual, page 55)

• 1.25 cochranes: 1,250 millicochrane warp engine was the classification of a nacelle of the Type 7 shuttlecraft. (Star Trek: The Next Generation Technical Manual, page 161)

• 2.1 cochranes: 2,100 millicochrane warp engine was the classification of a nacelle of the uprated Type 6 and Type 7 shuttlecraft. (Star Trek: The Next Generation Technical Manual, page 161)

• 2.15 cochranes: 2,150 millicochrane warp engine was the classification of a nacelle of the type 9A cargo shuttle. (Star Trek: The Next Generation Technical Manual, page 162)

• 2.175 cochranes: 2,175 millicochrane warp engine was the classification of a nacelle of the uprated type 9A cargo shuttle. (Star Trek: The Next Generation Technical Manual, page 162)

• 3.35 cochranes: The subspace field generated to some computer core elements of a Galaxy-class starship to allow FTL data processing was 3,350 millicochranes. (Star Trek: The Next Generation Technical Manual, page 49)

• 3.594 cochranes: The subspace field generated to the Starfleet computer core elements of Deep Space 9 to allow FTL data processing was 3,594 millicochranes. (Star Trek: Deep Space Nine Technical Manual, page 49)

• 4.325 cochranes: The intended minimum level in the upgrade to the subspace field generated to the Starfleet computer core elements of Deep Space 9 was 4,325 millicochranes. (Star Trek: Deep Space Nine Technical Manual, page 38)

• 9.583 cochranes: The level of subspace distortion around the mouth of the Bajoran wormhole was 9,583 millicochranes. (Star Trek: Deep Space Nine Technical Manual, page 6 okudagram)

• 10 cochranes: Under the conditions where a warp field of 10 cochranes achieves warp factor 2, approximately 3 terajoules are required to create the field, and only 20 gigajoules to maintain it. (Star Trek: The Next Generation Technical Manual, page 55)

• 39 cochranes: Under the conditions where a warp field of 39 cochranes achieves warp factor 3, approximately 59 terajoules are required to create the field, and only 590 gigajoules to maintain it. (Star Trek: The Next Generation Technical Manual, page 55)

• 102 cochranes: Under the conditions where a warp field of 102 cochranes achieves warp factor 4, approximately 610 terajoules are required to create the field, and only 15 terajoules to maintain it. (Star Trek: The Next Generation Technical Manual, page 55)

• 214 cochranes. Under the conditions where a warp field of 214 cochranes achieves warp factor 5, approximately 4.3 petajoules are required to create the field, and only 150 terajoules to maintain it. (Star Trek: The Next Generation Technical Manual, page 55)

• 392 cochranes. Under the conditions where a warp field of 392 cochranes achieves warp factor 6, approximately 24 petajoules are required to create the field, and only 1.2 petajoules to maintain it. (Star Trek: The Next Generation Technical Manual, page 55)

• 656 cochranes. Under the conditions where a warp field of 656 cochranes achieves warp factor 7, approximately 130 petajoules are required to create the field, and 13 petajoules to maintain it. (Star Trek: The Next Generation Technical Manual, page 55)

Kilocochrane = 1 thousand cochranes

• 1.024 kilocochranes. Under the conditions where a warp field of 1.024 kilocochranes achieves warp factor 8, approximately 610 petajoules are required to create the field, and only 100 petajoules to maintain it. (Star Trek: The Next Generation Technical Manual, page 55)

• 1.5 kilocochranes: 1,500+ cochrane warp core was the generic classification of many Federation starship warp drives capable of maintaining speeds of warp factor 9.2 to 9.982 for 12 hours. (Star Trek: Deep Space Nine Technical Manual, pages 151-158)

• 1.516 kilocochranes: Under the conditions where a warp field of 1.516 kilocochranes achieves warp factor 9, approximately 3 exajoules are required to create the field, and only 1.2 exajoules to maintain it. (Star Trek: The Next Generation Technical Manual, page 55)

• 1.65 kilocochranes: When the development of the Galaxy-class began, 1.65 kilocochranes was the sustainable field output level that was to be exceeded by the warp core of the the starship. (Star Trek: The Next Generation Technical Manual, page 1)

Megacochrane = 1 million cochranes

• 1.2 megacochranes: 1,200,000 cochrane-hours was the goal life cycle of the primary warp coils of a Galaxy-class starship between refurbishments, when the development of the class began. (Star Trek: The Next Generation Technical Manual, page 1)

• 2 megacochranes: 2,000,000 cochrane-hours was the goal life cycle of the secondary warp coils of a Galaxy-class starship between refurbishments, when the development of the class began. (Star Trek: The Next Generation Technical Manual, page 2)