Equipped with gimbals mount, the boom adopts inward and lateral inclination which can make the aircraft more stable in roll and pitches directions and flexible in rotate. 500mm Wheelbases rack, suitable carrying gimbals for Hero3, entertainment grade flight photography, and practice machine option. Adopting integrated Printed Circuit Board wiring and equipped with strengthen 5um composite Printed Circuit Board, electrical adjustment and other wiring faster and safe. Four force arms are craft from nylon and carbon fibered rod, each arm is reinforced with a whole carbon fibered rod. The new is lowered the installation position of the motor and raised the Printed Circuit Board position, making the center of gravities of the new four aircraft lower and more stable.