Walkera 380SH motors have decent brushes
In the light of day I have had a good look over the 380SH motors. They are slot vented top and bottom and also have decent slots in the sides. They need to be run a couple of times to bed in the nice fat brush blocks they have... Yes you heard me right. The brushes consist of nice 1mm + thick copper arms with decent sized copper/carbon brush blocks making plenty of surface contact with the commutator. By the end of a 10 minute + flight the motors are no warmer than the LiPo.