With a nose similar to that of the modern 747, the Clipper was the "jumbo" airplane of its time with a top speed of 199 miles per hour. Boeing built 12 Model 314s between 1938 and 1941. At the outbreak of World War II, the Clipper was drafted into service to ferry materials and personnel. Few other aircraft of the day could meet the wartime distance and load requirements. Able to carry 74 passengers and a crew of 10, the four-engine Model 314 was the largest passenger airliner of its time. The Clipper's 74 seats converted into 40 bunks for overnight travelers.