Originally Posted by
pphaneuf
Wait, wait, wait, I'm only changing the (fully static, so no ESC shenanigans) timing setting, are you guys telling me that from that, I could somehow get the approximate torque curve?!?
The only information I have at the moment is the max RPM (from the ESC), nothing else. Notably, I don't have the current, but I suppose I could get an ammeter and get that one relatively easily?
Yes, but as Jebarus stated it would only be approximate. All of our banter is based on a very simple motor model. That model implies that if you advance the timing, and the Kv increases, then the Kt decreases by the same amount, leaving the peak power output constant. We know that this is not true, and that's why we want to make a dyno!
The above implies that we can get an approximate optimum timing advance curve, where the optimum timing is that which gives a free-running speed of double the instantaneous speed of the motor. It's a good place to start.