Max thrust of a single motor

[malintha]

Hi All,

I'm developing a controller based on the thrust. Does anybody know the max lift a single motor can generate for that? I saw in the firmware that the max thrust of all four motors has been assumed to be 60g. So can I safely assume that the maximum vertical thrust that a single motor can generate is 15g and use it to calculate the motor ratio? (But I have a feeling that it could be more than that since cf can lift a maximum payload of 57g and usually it requires more than the weight to takeoff with tilt compensation)

Thank in advance,
Malintha

[arnaud]

Hi,
We have done some study on the thrust at some point: https://wiki.bitcraze.io/misc:investigations:thrust it looks like we have measured a max thrust of 57g for all 4 motors.
There has also been some system identification done by universities: https://www.bitcraze.io/research/#publi ... azyflie-20

These should give some idea of how the motors are behaving.

[malintha]

Thanks a lot, arnaud! The system identification study was all what I wanted. If anybody else is searching, this is the function that maps the input value (cmd = 0-65535) to the thrust of a single motor.

f = 2.130295 * 10 ^(−11) * cmd^2 + 1.032633 * 10 ^(−6) * cmd + 5.484560 * 10 ^(−4)