section_path: Career/Ford Airplane Company/Willow Run
section_name: Willow Run
paragraph_text: Willow Run
  
  Before the U.S. entered the war, responding to President Roosevelt's call in December 1940 for the "Great Arsenal of Democracy", Ford directed the Ford Motor Company to construct a vast new purpose-built aircraft factory at Willow Run near Detroit, Michigan. Ford broke ground on Willow Run in the spring of 1941, B-24 component production began in May 1942, and the first complete B-24 came off the line in October 1942. At 3,500,000 sq ft (330,000 m), 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.