@victochen , sounds good, feel free to ask more questions.
The 62A current draw (1.3KW!) for one motor is probably OK for motor to sustain for a short period of time, but my guess is that the motor itself would overheat pretty quickly. Unfortunately I could not find any test data about this particular motor, which is unusual.
If we knew the propeller's thrust vs rpm, you could estimate your hover power draw right from this calibration plot (knowing the weight of your drone).
In any case, after you do a short first flight, you should analyse the log data, if you are using PX4, you can use flight-review to view the PX4 logs. Additionally, we maintain our own version of the flight review analysis tool, which includes some VOXL2 specific updates including all the ESC data (commanded and actual rpms, etc). You can find the fork of flight-review and instructions how to use it locally on your machine here : https://github.com/modalai/px4-flight-review
The total current (as the FPV ESC does not measure the individual motor current), will be reported in the battery_status message in the PX4 log and is viewable using flight-review (there is a section for battery voltage / current).
Also just to give you an idea of M0138 performance (and you can reproduce these tests), here is a test of 4 2207 motors with 5x4x3 props, 6S battery, spinning at 25K RPM (in closed loop RPM control mode) with full airflow cooling of the ESC. You can see the the ESC temp(s) go up pretty quickly, but this particular test was pretty short, i think i did not want to cook the motors, since ESC temps were still fine. The ESC is pulling around 125-130A total in this test and the performance is stable. You will notice two temperature bands in the 4 temperature measurements because these temps are reported from different locations (the higher temps are from the MCU's built-in temp sensors, which run a bit hotter due to MCU power consumption) and the lower two temperature measurements are from dedicated temperature sensors located next to the Mosfets (top and bottom of board).
m0138_full_cooling_25000_rpm_8sec.png
voxl-esc tools provide the tools to perform this analysis on the bench pretty easily and find out how your propulsion system is stressed under different conditions. You can also get similar logs from flights / px4-logs for real use case analysis.
Finally, our ESC driver in px4 supports warning and critical temperature limits, which will send out warnings to QGC if those limits are reached. The limits are disabled by default, but you can enable them with params: https://github.com/modalai/px4-firmware/blob/voxl-dev/src/drivers/actuators/voxl_esc/voxl_esc_params.c#L238 . However, i am not 100% sure of the behavior of PX4 if ESC reports critical temps, it could enter some failsafe mode, or something like that - you should double check that, if you enable these warnings.
Alex
