Experimental Research on Foldable Gliding Wing with Flap Wing

Most of the gliders need to be assembled and disassembled before and after flight. After reviewing the information, we found that there are almost no semi-automatic foldable gliders on the market. Based on the four-bar linkage and slider structure of the umbrella, we designed two umbrella-like structures to fold the glider's wings and its tripodone on the upper part and one on the bottom part. These two umbrella-like elements are controlled by the same main slider, which is placed in the horizontal direction at the middle part of the entire structure (one on both the left half and the right half). Meanwhile, glider wings may encounter many obstacles and weather conditions, such as wind and rain, during flight. In order to adapt to wind velocity and detour obstacles, we have decided to use another four-bar linkage structure to adjust the elevation angles of the left and right wings separately. There are four such four-bar linkage structures on the wings (two on both the left half and the right half). If the speeds of the left wing and the right wing are not the same, the direction of flight can be changed. Thus, this structure can facilitate takeoff, speed adjustment, and direction change.