T5 actually has the progression of tech levels and reduction of the
100D... so, yeah, at TL32 things get real wonky
And the G:IW timeframe matches to early TL drives ...

I'm a real fan of T5 LOL

On Mon, May 1, 2023 at 12:18 PM greg nokes - greg at nokes.name (via
tml list) <xxxxxx@simplelists.com> wrote:
>
> Made it back to my desk and books. :D
>
> From the G:IW book:
>
> "The mathematics of jump navigation is much simpler when there is a large mass, a star or very massive planet, in normal space close to each end of the jump. During the Interstellar Wars era, neither Terran nor Imperial navigators are able to plan a jump that starts or ends in deep interstellar space, far away from any such massive object.
> This means that the vast majority of interstellar travel must go from one star system to the next. The empty hexes on the maps in Chapter 5 (or on subsector maps generated using the rules in that chapter) are normally off- limits to starships using the jump drive. This means that “gaps” – regions of space containing no star systems – can be so wide as to be impassable!
>
> Of course, interstellar space is not entirely empty. An enterprising astronomer may be able to find massive objects even in the empty hexes on the maps: rogue sunless planets, large comets, “brown dwarf” stars, and so on. Such objects could easily serve as an “anchor” for one end or the other of a jump. Terran navigators call such deep-space objects “jump points,” and are willing to use them as needed. On the other hand, the Imperium has not searched for new jump points in centuries, and Imperial navigators rarely use even the ones that are known.”
>
> Since CT allows void jumps and it’s a handful of thousands of years later, I always assumed that early jump drives (and the underlying math to compute a jump) had not developed to the point where a void jump was safe.
>
> As time went on and with Solomani inquisitiveness, better mathematical models were developed and baked into the navigation routines which allowed for safer void exits. Up to the point where in the I3 they are not common, however they are safe.
>
> Extrapolating out further, we can imagine someone with Grandfather’s time and knowledge getting more and more advanced models and hardware, leading to surface to surface jumps or other magical tech.
>
> I mean, we know that Grandfather sends passable as sophont androids out to keep tabs on folks. Why would he build ships if he could just pop them out on Regina in a hotel room and allow them to travel wherever they need to?
>
> On Apr 29, 2023, at 4:13 PM, Tom Rux - tmr0195 at comcast.net (via tml list) <xxxxxx@simplelists.com> wrote:
>
> Howdy Jeffery,
>
> Thank you for confirming I was not out to lunch with my understanding of CT.
>
> I still have not purchased T5 so I do not have access to the source material. My last purchase was Mongoose Traveller.
>
> Tom Rux
>
> On 04/29/2023 10:35 AM Jeffrey Schwartz - schwartz.jeffrey at gmail.com (via tml list) <xxxxxx@simplelists.com> wrote:
>
>
> Hello Tom -
> Yes, you're dead right for CT
>
> I've been living in T5 the last several years. Not sure if you've read or fiddled with it, but I think T5 is the best of them. It's very CTish in some ways, but with a lot more expansion and explanation that clears up most of the CT era and MT era debates, especially on how spacecraft work
> I guess I should have specified which edition I was coming from in my answer, my bad.
>
> One of the T5 things is that X is commonly available at TL Y... But as early as Y-3 there's experimental and prototypes. At Y-1 there's "early jump-N" which does not have a governor, is larger, more expensive, uses more fuel, etc
>
> At Y+1, they start getting better, less fuel, less tonnage, or same tonnage but cheaper... And more reliable, less likely to injure you when they do fail, and easier to use.
>
> On Fri, Apr 28, 2023, 18:10 Tom Rux - tmr0195 at comcast.net (via tml list) <xxxxxx@simplelists.com> wrote:
>
> Hello Jeffery,
>
> My understanding of CT LLB 2 1st ed 1977 is that a ship's jump drive used all the jump fuel regardless of the actual jump made. A ship with a J2 drive can make a 1 parsec jump but will use all the fuel. My understanding is based on the following guideline:
>
> CT LLB 5 Hg 1st edition 1979 p. 32 "Jump Governor: It is possible to procure a jump governor for ships produced according to Book 2. It allows such a ship to utilize fuel more efficiently; instead of consuming all fuel when performing a jump, regardless of the jump number, the ship will consume fuel equal to 0.1MJn, where Jn is the actual jump number used, rather than the maximum jump number available. Available at any industrial world with tech level 10 or higher. Cost Cr300,000. Mass 1 ton. Ships produced according to this boo already have the jump governor as part of their drives."
>
> Of course I could be out to lunch on my understanding.
>
> Tom Rux
>
> > On 04/28/2023 6:04 AM Jeffrey Schwartz - schwartz.jeffrey at gmail.com (via tml list) <xxxxxx@simplelists.com> wrote:
> >
> >
> > You precipitate from jump space at the location you specified when you
> > built the jump, unless:
> > 1) a systems failure causes a misjump
> > 2) a navigation error causes a misjump
> > 3) at the moment you initiate jump, your course line crosses the 100D
> > boundary of an object with more mass than your ship
> >
> > Early versions of Jump drives do not have jump governors. This means
> > that if you have an early Jump-2 drive, you're going to either go 2
> > parsecs, or deliberately plot courses that intersect objects less than
> > 2pc away.
> >
> > On Thu, Apr 27, 2023 at 5:19 PM Christopher Sean Hilton - chris at
> > vindaloo.com (via tml list) <xxxxxx@simplelists.com> wrote:
> > >
> > > Hi,
> > >
> > > I have a question about the mechanics of jump drive. Did I read somewhere that in a nominal
> > > jump trip, you precipitate out of Jumpspace at the 100D limit of a target object in normal
> > > space? If this is the case, how do you handle jump into empty hexes?
> > >
> > > --
> > > --
> > > Chris
> > >
> > >      __o          "All I was trying to do was get home from work."
> > >    _`\<,_           -Rosa Parks
> > > ___(*)/_(*)_____________________________________________________________
> > > Christopher Sean Hilton                    [chris/at/vindaloo/dot/com]
> > > -----
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