I was going over "Lightsecond chart" in FFS (pg 226-227) also seen as the Interplanetary Distance Matrix ...

So the chart is good for all sorts of orbits -- even Far companions -- say a Binary stellar or Trinary mix.

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So the engine I am using is my HT version of the TL 9 Fusion Rocket (I'll also show the TNE version -- and thus one can see which one they want ...

HT TL 9 FR (Hard Times pg 84)

TT - 195 ======= 19,500 TT

wt - 4 ========= 400 tons

vol - 1 ========= 100 kl

Fuel - .005 ====== .5/h -> 21,915 kl (5 yrs)

F.wt - .07 ======= 1534.05 tons

F.Type - Liq Hyd

Pwr - [+3.9] ===== [+390 Mw]

pr - .35 Mcr ===== 35 Mcr

so obviously uses a lot of light weight fuel -- but that 5 yrs is awesome for long range flights

so now

TNE TL 9 FR (FFS pg 70)

TT - 9 -> 99 (x200) =============== 19,800 TT

wt - 1 (11x200) ================== 2200 tons (since each engine is 11 kl/11 tons)

vol - 1 (11x200)================== 2200 kl

Fuel - .00035 (x19,800 TT) -> 6.93/hr = 30,374.19 kl (6 months)

F.wt - .07 (x30,374.19) ============ 2126.1933 tons

F.Type - Liq Hyd

Pwr - TTx.02 ==================== [+396] Mw (it *is* a self-contained thruster)

pr - .35 Mcr (x2200 kl) ============= 770 Mcr

note*: The TT-9 for the rocket is the Minimum thrust for it -- so I can really crank up the TT's for our rocket engine; the fuel usage will skyrocket also -- so the TT's of thrust I multiplied by 22 so that my TT was nearly identicle to the HT ones above

The differences I see? .. the TNE using all those engines which take up wt & vol + the added fuel usage, and thus fuel wt -- so it all adds up.

So *this* is why I use the HT Fusion rocket compared to the TNE version -- although I could see the HT FR being say a TL 10 or 11 version of thre TNE FR.

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OK -- so now for the real meat of my question ...

a light year = 31,557,600 seconds (60x60x24x365.25)

we want to use acceleration by G's section on FFS, pg 227

so -- let's say our Fusion Engines are burning at a constant 1G for a full month -- how much acceleration do we get -- and how many light seconds can we go?

1) (24x365.25)/12 -- should be 730.5 hrs in a month

2) we look at the Interplanetary Speed chart (pg 227) and see 8G & 18 seconds.

3) We know that 18 is 1/40th of 730.5 (basically) -- thus according to the rules ....

4) we divide 18 by 40 ... and get .45 of a minute to travel 1 light second (which is 18 seconds)

So my Far companion is right in the midddle of Orbit 15 & 16 -- right at 3731 AU -- or 1,837,950 ls

6) 1,837,950 x .45 = 827,077.5 min

7) 827,077.5/60 = 13,784.625 hrs

8) 13,874.625 /24 = 574.35937 days

9) 574.35937/365.25 = 1.5725 yrs

So to travel to a Far Companion is not bad at all: 1 mo burn to get up to speed -- then 1 mo in reverse to slow down -- so 2 months of fuel total use. (The TNE version of the FR would work fine for this kind of trip)

But now -- let see what we can do for a Parsec -- true Interstellar distances!!

(we would need to use the HT version of FR for this trip)

we will do a 1 yr long constant burn -- the acceleration should be pretty damn good.

8766 hrs/yr

we will use the 9G and 16 sec line

16 is 1/547th of 8766

so 16/547 = .02925 min/ls = 1.755 sec/ls (which comes to roughly 57% Light Speed --

31,557,600 x.02925 = 923,059.8 min = 15,384.33 hrs = 641.014 days = 1.755 yrs (for 1 LY)

which comes out to 5.265 yrs/Parsec [and only burning 2 years of fuel- so my 1st FR would have 3 left over once it go to its destination]