Archer's Five Parsec Drive

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The J5H "Archer drive" was developed semi-secretly by the Free Worlds Federation. Early on in pre-project research Dr. Archer had solved key equations allowing laminar Alcubierre fields in a ring formation. These were suppressed and the development continued in secret. Previously, fields were generated by brute force using emitters distributed throughout the mass of the ship and anticipated payload. This approach had seen initial success, allowing development of the J2 or 2 parsec jump drive. It could scale with ship size but it was inefficient, unable to maintain its Alcubierre field for more than two parsecs of wormhole transit. Even then, a full two parsecs was much harder than the earlier "magic number" of 1.19 parsecs (3.88 ly) which required one quarter the field nodes but was not capable of travel to Proxima Colony in a single jump. Dr. Archer solved the "ring problem" of how to solve earlier equations that indicated a smooth bubble would be highly efficient.

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The structure of early project drives was a single ring, which was much improved. This early innovation was the J3 or 3 parsec drive. The team, however, all felt there was much untapped potential. With nearly another decade of discovery it was shown that multiple rings could work even better than one. This design issue made the J3 drive look like child's play but the J5 drive was developed. Simultaneously the team discovered how to safely hot jump a drive, jumping a second time with a hot drive and no cool down time. Their work culminated in several successful prototypes and eventual the Apollo tender ship as part of project Aldrin.

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Dr. Sakura Archer and her handpicked team continue to advance the state of the art in a number of systems. She has indicated there is still room for significant advances to the Apollo-Aldrin system in the phase 2 refit and beyond. Having her advanced work on hand was of significant benefit to future proofing the platform, so Aldrin carrier groups will have a long and distinguished service life.

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As of 2131 the other powers have pressed first generation J3P drives into service. Like the J2s these can not hot jump and still have field turbulence issues that limit payload mass fraction compared to even the early Federation J3s. Solar Authority J3Ps are expected to overcome their prototype issues with field refits.

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Jump Drive Classes

* J1 - 1.19 parsec - 3.88 Ly - 180 hr CD - 38 Ls GS - R7 - M18
* J1A - 1.06 parsec - 3.72 Ly, - 140 hr CD - 34 Ls - R6 - M10
* J2 - 2 parsec - 6.52 Ly - 195 hr CD - 34 Ls GS - R6 - M44
* J3P - 3 parsec - 9.79 Ly - 178 hr CD - 29 Ls GS - R8 - M19
* J3 - 3 parsec - 9.79 Ly - 192 hr CD - 27 Ls GS - R9 - M15
* J3H - 3 parsec - 9.79 Ly - 192 hr CD - 25 Ls GS - R9 - M12
* J5P - 5 parsec - 16.31 Ly - 227 hr CD - 19 Ls GS - R10 - M18
* J5 - 5 parsec - 16.31 Ly - 168 hr CD - 17 Ls GS - R12 -M15
* J5H - 5 parsec - 16.31 Ly - 168 hr CD - 14 Ls GS - R12 - M12

P is prototype design

H is hot jump capability

A is an advanced, miniature, drive module. This recent refinement of the J1 with a J2M in development. They can only work with small to mid size vessels but allow smaller craft to explore.

M is the % mass of the drive system including all specialized equipment, reactors and radiators required. This is a percentage of the total mass that may transit through a jump.

1 Parsec = 3.2616 Light years (Ly)

1 Light second = 299,792.46 kilometers

CD is Cool Down in hours before drive can jump again safely, drive failure modes are not well understood but at least it will result in a ruined drive

GS Gravitational Separation in light seconds from the nearest gravity well above 0.09g

R is refurbishment limit, the number of reliable jumps before the drive needs to be partially disassembled and serviced. This applies only to early era jump drives such as human technology still produces in the G13X universes - though the humans indigenous to that part of the multiverse have not encountered alien ships or cultures as of 2131 so they have no record of more advanced cultures. Note that a carrier crew, tender crew or very talented engineer with the right tools can refurbish a drive in the field but keeping spare parts eats up cargo capacity. Refurbishment can take a week on good conditions to a month or longer in the field, with drive damage, etc.

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