The 8,000 planes you refer to were all B-24 Liberators, one of the most complex aircraft produced at the time. Ford's Willow Run plant built almost half of the entire production run of this plane, with the rest built by two Consolidated Aircraft factories and one North American Aviation factory. The peak output of 428 in a month works out to 1.7 hours per plane.
Besides the fact that the B-24 was a very large, complex plane to manufacture for its day, don't forget that Ford was also busy building lots of other military items, such as a large number of Jeeps.
Besides the fact that the B-24 was a very large, complex plane to manufacture for its day, don't forget that Ford was also busy building lots of other military items, such as a large number of Jeeps.




















































