[Space/Spaceships] TL9 nomad fleet - playable?

[cccwebs]

Most ships need at least one system dedicated to one of each: Control Room, STL drive of some sort, reactor or other energy source, FTL drive of some sort, and a fuel tank (unless the none of the drives require fuel).

In a "fleet" setting, you'll probably want to include at least one Hangar Bay in every large craft. Transferring cargo would be considerably safer from internally docked ships vs "tubes" connecting ships externally.

At least one significant ship needs Mining and Refinery systems. It is not exactly clear if it would be more efficient to have a Homeworld-style Refenery ship with a Hangar, and lots of STL Miner Ships.

This is tricky. I'd think that smaller ships for the mining and refining with some sort of base cargo ship (for storage of refined materials and FTL tranport of the smaller ships) would work better. The problems with "in flight" mining/refining are going to be based more on the FTL/STL settings of the game than anything else. Ships with FTL and reactionless thrusters are going to be easy to deal with as they won't have to deal too much with delta-V and reaction mass. Reaction drives will require considerable planning on the part of mining operations as any of the vessels involved will have to expend reaction mass in reaching the raw materials and returning to the fleet.

'Population' ships consist of the necessary systems, plus an Open Space (or two for redundancy), with the rest of the slots filled by Habitat systems. Note that they are not 100% living space - there are also schools, offices, labs, clinics etc. The % of space dedicated to each will probably be analogous to that on earth, with some corrections.

Sounds about right, though 'population' ships might want to include at least 1 fabricator system to help with essentials.

Several ships should have Fabricators, preferably those with storage facilities. I'm not sure how to properly build a HW-style mobile shipyard in G:SS.

Mobile shipyards for a fleet would be limited in the size of ships they could construct. Unless setting up 'camp' for a while, any ships built should be able to fit inside (no larger than what can fit in the hangar bay). If a larger ship is needed, then the fleet would need to 'camp' for the duration of construction.