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Unusually wide and long (over lO5′), the Boeing 747 wing skins rarely test the performance of this massive stretcher. Located at Alcoa’s Davenport (Iowa) Works, this machine was installed with the future in mind since industry demands points to even longer and wider aluminum plate than the current giant 747 requires. Stretching provides flatness and aligns internal structural stresses. The alumium plate is placed between the huge jaws and lengthened as the machine slowly exerts its a-million pound pull.