Inrunner motors tend to spin
exceptionally fast, often as high as 11000 RPM KV. However, inrunner lack torque. As a result, most inrunner are used
in conjunction with a gearbox in
both surface and aircraft models to reduce speed and increase torque。Modern brushless inrunner can have iron core windings to
address the lack of torque while maintaining high RPM capability, more commonly
used in RC car and truck applications