The site ct-starships on yahoo Richard "Jason Barnabas" Flores shared the spreadsheet "Information about Analysis LBB 2 Engines in HG". I have looked over the spreadsheet but I have not figured out what the material is telling me yet.

I do not agree that the Drive Potential Table on CT LBB 2 1977, 1980 page 22 are all built at TL 15 since the CT LBB 3 1977, 1980 Technological Charts on pages 14-15 have Jump Drives Type A-D with performance levels of 2, 4, and 6 available at TL 9.

CT LBB 5 HG 2e 1980 established that the J4 drive is available at TL 12, however in CT LBB 3 the Technological Levels chart shows that by TL 12 Drive Types A-N are available. Comparing the CT LBB 2 Drive Potential Table with the CT LBB 3 TL Chart a J4 drive is available as a TL 9 Type B, TL 9 Type D, TL 10 Type H, TL 11 Type J, TL 12 Type M, and TL 12 Type N. The only CT LBB 2 drives that fit the CT LBB 5 J4 drive criteria are the Type M or Type N drive.

The CT LBB 5 criteria for a fusion power plant is TL 7 while in CT LBB 3 fusion power is available at TL 8. In CT LBB 5 the reactionless maneuver drive is available at TL 7. In CT LBB 3 non-starships are available at TL 7 there is no mention of a maneuver drive. The CT LBB 3 the TL Chart has the Drive Types starting at TL 9.

Technically CT LBB 2 non-starship and starship designs start at TL 9 while CT LBB 5 allows non-starships at TL 7 and starships at TL 9.

As far as I recall (and you would have to trawl the archives) the “standard” jump drives in book 2 are the most efficient drives you can get in CT.

Which suggests, and what I believe the consensus of the list was, that they are all built at the best tech level they can be (TL15), and then shipped to various shipyards as “standard” drives you can just buy “off the shelf”.

This then provides justification against different drive letters providing different jump distances in different hull sized (they are all TL15) so they can provide higher jump distances in smaller hulls, or smaller distance in bigger hulls (as long as you have the computer to back them up).

But what they are not is a TL12 drive that can provide jump 4, because Jump 4 is TL13.

The TL to jump range is in CT. The TL charts in the Traveller book have them defined, and they may well be in starter Traveller or elsewhere as well.

xxxxxx@quibell.org.uk

Sent from my ZX81

For the fallen in the cause of the free:

"When I go home I will tell of them and say,

For our tomorrow, They gave their today."

My spelling is entirerly due to dyslexia, typos, and poetic license

On 15 Oct 2019, at 14:12, Thomas RUX < xxxxxx@comcast.net> wrote:

Hello Greg Nokes,

I can share the spreadsheet with the caveat that it is a slapped together construct that appears, aside from cost and crew, to work good enough for me, I think it works anyway.

Send me an e-mail and I'll send you a copy of the spreadsheet which is an Microsoft Office 2010 Excel Spreadsheet.

Tom Rux

On October 14, 2019 at 8:59 PM Greg Nokes < xxxxxx@nokes.name> wrote:

Aside;

Are you sharing these creation system sheets that you are using? I’d love to have access to some sheets for older systems.

Sent from my iPad

On Oct 14, 2019, at 6:32 AM, Thomas RUX < xxxxxx@comcast.net> wrote:

Hello Phil,

I'm trying to work on the calculations but the scratch spreadsheet I hastily put together is slowing me way down. I hope to have something in the next couple of days.

Before I get to deep I wan to make a quick check to ensure I'm calculating the right instance of J-max.

CT LBB 2 1977, 1981 and CT LBB 3 1977, 1981

TL 9 100 ton hull standard: J2 constrained by 15 ton drive space requirement and custom J3 by reducing Power Plant fuel tankage to 2 or 3 weeks of operation.

Is this want is being asked for?

Tom Rux

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