An aircraft autopilot is a combination of mechanical, electrical & software systems that guide a vehicle without human intervention. Piloting aircraft is a very complex & tedious job resulting in wear & tear of pilots in long distance flights. Autopilot feature in aircraft"s helps to reduce the work load on pilots making them more productive & active. This project aims at design & implementation of Auto Pilot Control System. Thrust required to take off flight along with added payload can be achieved by giving PWM pulse to the main motor. Main motor draws high amount of current which can be supplied using H-brigde circuit. Sensors such as Ultrasonic sonar & Accelerometer are placed onboard to limit the flight height &caliberate the tilt angle respectively. Microcontroller & Power supply to onboard electronic components are placed off the board to reduce the payload of the flight. Flight is being very sensitive to added additional payload, making it difficult to stabilize. Stability...