Hi Shawn,
The ESC is an Neumotors ADP 28S 300/400 A. It has a hardware RPM signal and no telemetry. So the hardware output signal needs to be hardwired into the flight controller. Is this possible and if so how do you setup ArduPilot to track the signal and use it to tune the INS harmonic notch filter?
ADP ESC info:
https://neumotors.com/product/apd-uhv-28s-brushless-esc-120v-400-amps/
William
P.S. my design is actually more complicated. It is a 200 lbs tricopter with 2 more ESCs of a different type in front (Turnigy Fatboy 15S 300A), but they have no hardware RPM output signal.
Details of the vehicle design are found here:
https://discuss.ardupilot.org/t/new-full-scale-unmanned-winged-tiltrotor-vtol/78146