I flew my Trex 550 today with 553mm Edge blades, I'm using the stock motor which is the Align 600m. At the end of the flight I touched the motor and it was too hot to hold your finger on, I fly for 4 minutes on a throttle curve of 100-95-90-95-100. The heli seems okay on the power front but at the end of one flight i think i smelt electrical burning but not sure if it was the heli. The align 70A ESC was only at 40c at the end of the flight.
What are other peoples experiences? I have a IR temperature sensor I will take with me next time I fly but wondered if the motor is getting too hot and on the way out.