tlb wrote:Can FTL communication occur within a hyper band? It seems probable, but it is not clear what range would be available. However one problem is that the communication is within the band, you would still need to physically carry the resultant data down into normal space.
Yes, but it's not as useful as you might think. The issue is that the FTL signal travels at the speed of light of the next higher group of hyper bands.
Which is great in normal space as the speed of light in the Alpha bands is 62 times faster than in normal; a major time savings.
But the higher you go the smaller the differential.
RFC provided a handy chart of
effective speed by hyper band and you can use that to see what the FTL advantage in each band would be by dividing the velocity multiplier of the next band by that of the current band..
Normal space - FTL 62x faster than radio
Alpha bands - FTL 12.4x faster than radio
Beta bands - FTL 1.9x faster than radio
Gamma bands - FTL 1.5x faster than radio
Delta bands - FTL 1.3x faster than radio
Epsilon bands - FTL 1.2x faster than radio
Zeta bands - FTL 1.2x faster than radio
Eta bands - FTL 1.2x faster than radio
Theta bands - FTL 1.2x faster than radio
While FTL in the Theta bands
is 6000 times faster than radio in normal space; it's only 1.2 times faster than radio from a ship of buoy in the Theta bands. (Which also means the higher you are the less the FTL links of Apollo help your SD(P)s - though Apollo is pretty darned nasty even without those.
But aside from that, you're right that we'd need to use ships to move the data across the various hyper walls since no known signal can be seen across even a single hyper wall. (Despite ThinksMarkedly's hopes for such a system being eventually developed). Also given the fairly short range of a Hermes buoy we'd apparently need to hang a
lot of them to get a working link (and then they'd need periodic fueling and servicing - and since some systems are in the middle of a grav way you'd need at least some buoys big enough to mount sails to stabilize themselves there). There have been a few threads over the years discussing this
(but then, what haven't there been threads discussion?)IIRC an individual Hermes buoy can reach less than 10 lighminutes, if you want more you need another to relay the signal. That implies that there are about 40-50 (assuming no redundancy) making up the ~7 lighthour chain from Manticore to the Junction.
In comparison to run a chain of them from Manticore to Grayson (a piddly 31 LY) through the Theta bands would (assuming no range reduction there) require about 325. Of course at the moment about 80% of the galaxy would sell their grandmothers to be able to swipe even a single Hermes buoy - so a chain of hundreds stretching across the light years is a invitation to theft and reverse engineering.
(which is a problem since Hermes gives you most of what you'd need to build some Apollo-like capability for FTL missile control)Ignoring the time it takes the ships on each end to carry the message to and from Theta that'd get a signal down the length of the chain in about 46 hours (compared to 55 hours if you used basic radio/laser links on the buoys - or 91 hours if just taken there by DB)