This is a little off topic, but an interesting video on the B-24 liberator and how Ford was able to produce these in 1941 at the rate of 1 airplane every 55 minutes, with over 1 million separate parts!
http://xa.yimg.com/kq/groups/15654030/1604819366/name/bomber_plantwmv
http://xa.yimg.com/kq/groups/15654030/1604819366/name/bomber_plantwmv