T-MOTOR patented design improves the efficiency of longer flights. A special design of a winglet is employed to weaken the vortex and improve efficiency. The downward winglet abates the radial centrifugal tension and deformation quantity. Precise positioning avoids sweepback while the props are working. Push version propeller is special use on the bottom side of a co-axial frame. Improve safety performance with tightened fitted screws and locknut and two more hole sites. the innovative addition of a limit rubber ring to protect the propeller from abrasion and better shockproof competence.