For phase five of C-17 Drag Reduction testing, two fairings will be placed on each winglet. One winglet fairing is located at the wing to winglet transition (shown) and the other fairing is located on the upper inboard side of the winglet. The winglet fairings will be added to the six wing pylon fairings and 12 aft fuselage microvanes of the aircraft used in phase four tests. All the test articles are 3-D printed by Lockheed Martin and bonded to the aircraft by Boeing contractors. (U.S. Air Force photo by Kenji Thuloweit)