The enormous Catalina wing is mounted on a central pylon to raise the engines and propellers well above the water. Twin struts brace the 104-foot wing to the hull. The wing is made from aluminum, but parts of the trailing edges, along with the ailerons, are covered in fabric. The wing has an area of almost 1,400 square feet and plenty of room to hold 1,750 gallons of fuel in the center section. It needed all of that wing area because it could weigh more than 26,000 pounds for takeoff.