Brushless Sensorless Motor for 1:6 scale vehicles. Dimensions: 86.5 mm (L) x 49 mm (Ø). Shaft diameter: 5 mm. Weight: 587 g. Suitable for operation with 3-6S LiPo batteries (11.1 - 25.2 V). Number of poles: 4. Designed for on-road and off-road models in 1:6 scale. Sensorless. In sensorless brushless motors, the rotor position is determined by the back EMF induced in the stator coils, which is evaluated by the electronic control circuit. Since a minimum speed is required to evaluate the back EMF, sensorless brushless motors operate blindly until that speed is reached. A brushless motor is an electric motor without brushes, which, compared to brushed motors, features higher efficiency, lower wear, and reduced weight.