2022-01-19, 03:48 AM
I'm working on a similar project, using a pre-built PyPilot from Sean to steer an electric trolling motor in my fishing boat. I'd suggest you get under way at the max speed you'd feel good with autopilot on and use a fish scale to measure the max force it takes to turn the tiller. I tested mine, and it took about 3 pounds to turn. Remember that because of P-Factor (prop torque), one direction may be easier than the other, so you may need to test both port and starboard turns. 3 pounds is only 13 newtons, so in my case any strength actuator would do it.