Ycopter Quad Motor / Propeller Testing

I have successfully used the NTM 28-36 (28mm diameter, 36mm length) motors in a number of multirotor designs, on the YQ2 they work well and have adequate power, but when pushed they get hot. I searched for an alternative with greater current handling, similar weight but still great value for money.

NTM 30-35 motors with 10" X 5 Graupner e-props.

There is no alternative NTM in the 750Kv range, so I went with the NTM 35-30 1100Kv motor which has a larger diameter but shorter can length. Interestingly both motors are around the same weight but they have very different current handling. Here are the specifications of both motors: 

The 28-36 750Kv motors are a nice match with 10 x 4.7 APC propellers, the higher Kv motors would therefore require a propeller with much less thrust. I had heard that the Graupner e-propellers provided less thrust than other propellers of a similar diameter and pitch, so I decided to give them a try. Here are the test results for both motors:

All tests were carried out with a fully charged 4S battery on the YQ2 Quadcopter (X 4 motors) at 100% throttle.

During flight testing the 35-30 motors performed really well, very high performance and the motors came down cold after each flight.

Verdict - If you want very high speed from the YQ2 and you can afford the Graupner e-props, then go for the 30-35 motors.  They sound smoother and have quite a bit more power.  If this is your first quad then stick with the 28-36 motors until you are used to flying it and are less likley to break expensive props! 

Take a look at this video to see these motors in action: