In Renton, Washington, aerospace company Boeing builds each of their 737 narrow-body jets in just nine days… around 42 per month. As competition ramps up with Airbus for the domestic jet market in China, Boeing is aiming for 57 planes per month by 2019. Wired visited their 1.1-million-square-foot factory to share how.

Watch more videos about airplanes and factories on this site, including MinutePhysics’ visit to Airbus to see how they build A350 airplanes.

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