Hobbywing recently announced a new brushless motor for scale crawler enthusiasts looking for a compact, all-in-one power package. The 540 sized brushless motor is offered in 1200kv and 1800kv varieties and measures in at 36mm in diameter and 64mm in length. The extended length houses the Quicrun Fusion’s built in speed control, eliminating the need for external sensor wires or a bulky speed control case.
Inside the Fusion motor is an intelligent torque and RPM control system known as the Field-oriented Control (FOC for short), adding low-speed control when going uphill or down and smoothing out throttle inputs for increased traction (this feature can be disabled for a more traditional driving experience). The motor is compatible with 2 or 3s batteries and is rated at 40 amps continuous with a burst current of 160 amps.
Link: https://www.hobbywing.com/goods.php?id=671&filter_attr=