Note I have pulled out what are the key bits of information and tried to quote the material used exactly.
In the 1977 CT LBB 2 Starships 1977 The Engineering Section pp. 11-12: "Each starship is fitted with a power plant (to provide internal power and power the maneuver drive), a maneuver drive (for interplanetary travel), and a jump drive (for interstellar jumps). The installed power plant must be of a letter type at least equal to the drive letter of the installed maneuver drive (the power plant letter may be higher than the maneuver drive letter)."
From 1977 to 1979 I agree that the jump drive was a modified fusion power plant designed to get the ship into jump space without assistance from the fusion power plant.
In 1979 the first edition of CT LBB 5 HG was published, followed by CT LBB 5 HG second edition in 1980, CT LBB 2 Starships 1977/1981, and the Jumpspace article in JTAS 25 in 1985. Here are, I hope, the important bits.
CT LBB 5 HG 1979 p. 23 added the information that "on any given ship, the power plant number must at least equal the higher of the jump drive number or the maneuver drive number." Capacitors are mentioned on p. 28 linked to force field projectors.
CT LBB 5 HG 1980 p. 22 Drives: "Non-starships may omit jump drives. Some ships (such as an express boat) omit the maneuver drive. All ships require power plants. On any given ship, the power plant number must at least equal the jump number or the maneuver number, whichever is higher." Force Field Generators, p. 31, "All energy, whatever form, that contacts the black globe is absorbed and diverted to the ship's capacitors, doing no damage. The capacitors in the ship's jump drive may be used to store this energy; additional capacitors may also be purchased."
CT LBB 2 Starships 1977/1981: Required Starship Components p. 13/The Engineering section: " A non-starship must have a maneuver drive and a power plant. A starship must have a jump drive and a power plant; a maneuver drive may also be installed, but it not required. In all cases, the power plant letter must equal or exceed the maneuver drive letter or the jump letter, whichever is higher."
JTAS 24 1985 pp. 34-38 Jumpspace by Marc Miller: Required Items pp. 35-36:
"Power Source: Jump uses large amounts of energy to rip open the barriers to rip open the barrier between normal space and jump space. Normally, only a fusion power plant can supply this energy. Some alternate systems make use od solar power generation (which operates more slowly, or anti-matter power systems (rare and very tech)."
"Energy Storage Nodes: Once power is generated, it must be stored until the instant of jump. Capacitors or large fast-discharge batteries fit this requirement."
"Strong Hull: Starships contain as an integral part of their structure a network of wiring which maintains the jump field around the ship"
"Computer: Jump drives have precise power requirements which can only be met if the power is fed under computer control. In addition, the calculations needed for a jump requires a high level of accuracy."
"Jump coils p. 36: The jump coils that channel a ship's energy within the jump drive are constructed of lanthanum, a rare earth which has exactly the correct properties for the purpose. Lanthanum coils are used to control the drive energies during jump."
Pulling all the material from 1979 to 1985 together my idea is now that the jump drive is not a specialized fusion power plant, but I have no clue other than the guts have capacitors, coils, and other stuff not described.
Of course my idea is probably out to lunch, but it is my best shot to date.
From: "Jeffrey Schwartz" <xxxxxx@gmail.com>
To: "TML" <xxxxxx@simplelists.com>
Sent: Thursday, February 11, 2016 8:29:02 AM
Subject: Re: [TML] Instant city
Jump Caps are separate from the power plant caps.
Heck, the Jump Drive is supposed to have it's own built in fast-burn reactor.
On Thu, Feb 11, 2016 at 11:15 AM, <tmr0195@comcast.net> wrote:
> Hello Jeffery Schwartz,
> IIRC the capacitors in the Jump Drive are the major reason for the huge
> power plant output, followed by the onboard weapons starting with the spinal
> mount, beam lasers, fusion guns, particle accelerator turrets, nuclear
> dampers, meson screens.
>
> I may have missed or more likely over-looked the Traveller sources
> mentioning the fusion reactor powering a battery/capacitor system. My
> experience on how submarines generate power is how I image a Traveller space
> going vessel to operate. The reactor heats up water into steam which is
> directed through a turbine that converts the steam into electrical power
> which is distributed through a power grid with all the components that
> allows the power output to be used by the lights, ventilation, other
> environmental systems, and the systems that need electricity to operate. The
> back-up systems for the reactor are batteries and a diesel generator.
>
> I like the alternate possibilities suggested here.
>
> Tom R
>
> ________________________________
> From: "Jeffrey Schwartz" <xxxxxx@gmail.com>
> To: "TML" <xxxxxx@simplelists.com>
> Sent: Thursday, February 11, 2016 7:02:53 AM
> Subject: Re: [TML] Instant city
>
> Did some quick checking....
> Tigress has 40k EP of power in normal operations.
> I think 1 EP is about 250Mw?
> I read that as the better part of 10 terrawatts for the power plant?
>
> Earth as a whole ate about 19Tw of electric in 2012.
>
> Most "detail oriented" Traveller stuff has the fusion plants charging
> some kind of battery/capacitor system, which is used to even out
> distribution needs to the ship systems.
>
> If you presumed the fusion reactors were running up until the landing,
> and then shut down, you'd have something like 400Tj of juice in the
> caps. (40Tw x 1000 second space combat turn)
>
> If all you're powering is lights, basic environment, and enhanced
> environment, I suspect that would last a long, long time.
>
> https://www.eia.gov/consumption/commercial/data/archive/cbecs/cbecs2003/detailed_tables_2003/2003set10/2003html/c14.html
> implies that very large buildings use about 17 Mw of power. Figure
> TL14+ has more efficient lighting and such, but also is running sewage
> processing that our buildings don't do.
>
> 400Tj divided by 17Mw comes out to about 18 years before the batteries go
> dead.
>
> If the ship's computer put the fusion plant into "hibernation" and
> only fired it for a 10 minutes or so every year, I think it might last
> a very long time. Maybe a 1 minute run each month.
>
> That also leaves out the many-many subcraft. I'd imagine one could
> pull the power plant from one of those, and use it to come up with the
> measly 17Mw needed for housekeeping.
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