Aerospace
| Tue 10 Feb 2026
Beijing, Feb. 11 -- China Helicopter Research & Development Institute has sought patent for Helicopter Ground Resonance Calculation Method Based on Multi-mode Coupling. This invention was developed by Wang Wentao, Zhu Minfeng, Zhang Jun, Ma Songlin, Wang Ying, Wang Yalong, Huang Yuping, Cheng Qiyou, Wu Tangzhen, Zha Jianping, Li..