The mig-21 belonged to another player (whose name I forgot), and I modified and optimized the control surfaces of the wings to improve maneuverability. It is fitted with an infrared photoelectric sight, an aerial refueling tube and a landing ladder on either side of the head. Install cockpits made by other players (forget names), five other players (forget names), gyroscopes made by them, missiles, guided bombs, machine guns, etc. Armed with: automatic lock AA missile X8, manual lock AA missile X8, meat cutter X2, guided bomb X2 (hellfire missile launch guidance, recommended launch speed of 550+), 50 pound bomb for unguided bombing), a powerful machine gun, a normal machine gun. The missiles are all locked by wide-angle radar, with no locked borders. Operation: AG1: turn on/off gyro AG2: turn on/off anti-air weapons AG3: turn on/off ground/sea weapons and head infrared photoelectric sights AG4: abandon land/sea weapons Lamps and lanterns of AG5: AG7: open the parachute AG8: cockpit instrument lights TIM: control the lift and lift of flap and tail control surfaces .Note: the gyroscope is turned on for yaw control, which has good yaw performance. If the gyroscope is not turned on for yaw control, the aircraft can be turned over. Thank you very much. Thanks to the players who made such good planes and parts, I was able to assemble this plane, even though I forgot their names!