Composite failsafe torque tube

A method for forming a composite air vehicle control surface, the method comprising:

• positioning a forward bag carrier on a lower mold;
• positioning a mid bag carrier on the lower mold;
• positioning an aft bag carrier on the lower mold, wherein the mid bag carrier is positioned at least partially between the forward bag carrier and the aft bag carrier;
• positioning a failsafe torque tube on the lower mold, wherein the failsafe torque tube is positioned at least partially between the forward bag carrier and the aft bag carrier, wherein the failsafe torque tube comprises an inner tube and an outer tube;
• adding an upper skin at least partially over the mid bag carrier, the aft bag carrier, and the failsafe torque tube;
• adding a lower skin at least partially under the mid bag carrier, the aft bag carrier, and the failsafe torque tube, wherein the outer tube, the upper skin, and the lower skin are made of a composite material;
• positioning an upper mold at least partially over the composite upper skin;
• positioning a forward bag at least partially around the forward bag carrier;
• positioning an aft bag at least partially around the aft bag carrier;
• and
• co-curing the outer tube, the upper skin, and the lower skin together to produce an integral, monolithic, composite article, wherein the composite article comprises the composite air vehicle control surface, wherein the lower mold at least partially defines a surface of the lower skin, and wherein the upper mold at least partially defines a surface of the upper skin.