 At , it was the largest assembly line in the world at the time.At its peak in 1944, the Willow Run plant produced 650 B-24s per month, and by 1945 Ford was completing each B-24 in eighteen hours, with one rolling off the assembly line every 58 minutes.Ford produced 9,000 B-24s at Willow Run, half of the 18,000 total B-24s produced during the war.