T-MOTOR F90 KV1300 motor is specially designed for long range quadcopters.5-6s setup The T-Motor F90 is specially designed for quadcopters that use a 5-6s LiPo. F-series The F-series focuses entirely on FPV pilots. Craftsmanship, quality and flexibility are central to T-motor's F-series, equipment for pilots looking for ultimate power! 1300KV The T-Motor F90 1300kV motors have an RPM of 1300KV. This means that the motor rotates 1300 times per minute per volt.