ok, brainstorming here…
refrigerant
isnt ammonia the more common coolant in space?
i hear that helium would be used to cool the DPF anode?
VASIMR
is the shape realistic?
pictures i’ve seen show the accelerators as longer cylinders
xenon propellant tank for VASIMR?
if opposing nozzles, then each VASIMR engine would connect at about the centre of mass?
can the VASIMR nozzles be positioned?
if they hinge/twist at or near the station’s centre of mass, then they could be
positioned quickly and effectively for acceleration in any direction
mass of the modules?
total station mass?