... 50-class 3D helicopter without ANY limits.With the belt-driven Titan X50B, Thunder Tiger unveiled the ultimate 50-class eCCPM ... , extreme 3D performance. Now comes the eagerly awaited torque tube driven version, Titan X50 Torque-tube version equipped not only with ... , of course, is the X50’s highly efficient, torque tube driven tail rotor. It’s perfectly engineered for crisp rudder response ...