HD520CT Align Trex 520 3G Carbon Fiber BladesProduct picture: Packaging picture: Function description: Product specifications: Applicable to T REX 550X 550E. The 520 3G main rotor is designed for intense 3D flight, combining flexibility and stability. The appearance adopts a new style of painting and airfoil, and strengthens the rigidity of the rotor to improve torsion resistance during flight. The design of the new airfoil effectively reduces unstable airflow disturbance at the wing end,