I have been playing Star Trek Bridge Commander for some time. Although such a ship never existed in the Federation, is there any modders out there who would be prepared to design a Federation Mothership?
you mean something like a mobile starbase? maybe a 2km long mobile starbase named infinity? ;) www.bridge-commander.com
what exactly do you mean by mothership?
There is a mobile starbase on bcfiles - stick a slipstream drive on that and you've got a mothership of sorts.
Very expensive to produce though...