Aviation
| Wed 25 Feb 2026
Beijing, Feb. 26 -- China North Unmanned Plane Research Institute has submitted a patent application for Cooling Device of Unmanned Helicopter. This invention was developed by Xu Xinyu, Qi Zhigang, Sa Rula, Li Liang, Zhao Dongyang, Hu Xiongwen, Xu Yuguo, Xiong Yunxiang, Liu Yonghui, Cui Qiannan, Bao Dongchen, Yao Yiming, Ma Libi..