The single engine small passenger plane is equipped with an engine with a LARGE CULVERT RATIO.Greatly improves the comfort ratio and saves fuel.However the design of loading the engine into the tail also produces as strong power torque.For I design the center of gravity relatively backward, so it is not easy to control. so I can consider adding flight control on my own. Sample foreign excellent maneuverability enhancement system and angle of attack sensor. the main landing gear is self made not very strong, and there is no spring.But also designed the landing gear cabin very launch with sufficient modifications space.The stability of the aircraft's vertical tail is not particularly good.However,It can be basically control, and it can be considered to install gyroscope and till the angle of.