Thank you to TapTechNews user Assassin for the tip! TapTechNews reported on May 16th that according to the Aviation Industry WeChat account, on May 13th, the AG600 'Kunlong' completed the final flight test for airspeed calibration and baseline stall speed compliance in the air segment, and successfully landed at the Pucheng National Civil Aircraft Flight Test Base in Shaanxi. According to official sources, airspeed calibration and baseline stall speed flight testing are crucial to ensuring the performance and safety of the aircraft, and are necessary steps to obtain the airworthiness certificate and put the new aircraft type into operation. Airspeed calibration is one of the necessary subjects for aircraft to enter the TIA (Type Inspection Authorization), where stall and dive air calibrations are high-risk subjects. Calibration can determine corrections for airspeed indication, pressure altitude, temperature, and angle of attack, and verify their compliance with airworthiness standards. Speed and altitude parameters are critical inputs for multiple systems, and calibration can improve measurement accuracy, reduce errors, and enable pilots to make more accurate decisions. Baseline stall speed flight testing is also one of the mandatory flight subjects for aircraft to enter the TIA. The significance of this test is to determine the minimum reference speed for transport category aircraft, to determine the flight characteristics and performance of the aircraft in stall conditions, and it is a key aspect of airworthiness certification. This speed corresponds to the speed at which the aircraft reaches the maximum lift coefficient, and plays a crucial role in determining takeoff, landing, and climb speeds. Determining the baseline stall speed is crucial to ensure that the aircraft can operate safely under various flying conditions. It provides a safety margin for pilots to ensure that the normal operating speed is significantly higher than the stall speed of the aircraft. The stall warning system also needs to set warning thresholds based on this data. The AG600 'Kunlong' is currently the world's largest amphibious aircraft under development, independently developed by China. The AG-600 amphibious aircraft features a single hull, cantilevered single wing layout; is equipped with four WJ6 engines, and uses a retractable tricycle landing gear. When carrying out forest fire extinguishing missions, the AG-600 can scoop up 12,000 kilograms of water in 20 seconds and make multiple round trips between the water source and the fire scene to extinguish the fire. During water rescue missions, the aircraft can maintain a minimum stable flight altitude of 50 meters and can dock on the water surface to carry out rescue operations, rescuing up to 50 people in distress at a time. As of the time of TapTechNews' article, the AG600 aircraft has completed preliminary validations of water rescue mode, firefighting capabilities, high-altitude ground tests, and night flight tests.