[gregebowman]

But if you want to be realistic, it's going to take 180-200 turns for a population to produce enough personnel to produce enough of a crew to a "human" ship. That's 10 turns per year times 18-20 years for a human child to reach maturity. Other races may produce adult personnel sooner, depending on their physiology. I think this should be taken effect into gameplay, although I'm not sure how it could be done.