rudder effectiveness test in low speed

例句：

1. 1. The engineer conducted a rudder effectiveness test in low speed to ensure the aircraft's stability.
   工程师进行了低速舵效测试，以确保飞机的稳定性。
2. 2.During the flight, the pilot performed a rudder effectiveness test in low speed to detect any potential issues with the aircraft's control system.
   飞行中，飞行员进行了低速舵效测试，以检测飞机控制系统的潜在问题。
3. 3. The test results revealed that the rudder effectiveness was not optimal at low speeds, which could affect theaircraft's performance.
   测试结果显示，在低速时舵效不理想，这可能会影响飞机的性能。