On December 5, 2023, the large-scale fire-fighting/water rescue amphibious aircraft "Kunlong" AG600 successfully completed the internationally recognized Class I risk test flight test subjects - flutter and aerodynamic servo elasticity (ASE) at the Shaanxi Pucheng National Civil Aircraft Test Base. The compliance test flight marks a solid step towards airworthiness certification for the AG600 aircraft.
This flutter/ASE compliance test flight verified that the AG600 aircraft meets aeroelastic stability requirements and related special conditions, and confirmed that the aircraft will not experience flutter and other aeroelastic instability phenomena and servo elastic instability phenomena within the design envelope. , and has an appropriate stability margin, providing a basis for model certification.
During the implementation of this compliance test flight mission, the Shanghai Certification Center, the Aviation Industry Flight Test Center, TAC South China and relevant participating research units thoroughly implemented the spirit of General Secretary Xi Jinping's important instructions, worked together, carefully organized, and overcame difficulties. It ensured that the test flight mission was completed safely and efficiently.
Flutter and aero-servoelasticity (ASE) test flights are internationally recognized Category I risk test subjects. All new aircraft and major structural changes require flutter test flights. Aircraft with fly-by-wire flight control systems must undergo ASE test flights. Flutter and ASE explore the right boundary limit of the aircraft flight envelope. It is no exaggeration to say that it is dancing on the tip of a knife. Once a flutter and ASE test flight is carried out, all members must enter a state of preparation. Project personnel are often under tremendous pressure. The closer they are to the right boundary of the flight envelope, the more rigorous and accurate calculations and analysis they need to do, and they also need to deal with emergencies.
Flutter and ASE test flights require long-term accumulation of theoretical foundation and engineering experience from flight test principles, excitation methods, test flight technology to data processing methods. Only with solid technology, excellence, unity and collaboration, and persistence in innovation can we perfectly complete the arduous and outstanding test flight tasks of flutter and ASE.