Originally Posted by mhills51
It's your throttle curve. The gearing for the 500 is such with it's large blades to not want to go under 80-85% anything under puts the system under incredible stress because the blades don't have the power or time to increase speed and at the same time your increasing your pitch, loading it up even more. You can test this by flying around. Start up high and start slowly coming down, now start to level out. If you find you need a lot of collective to stop the descent and you get a bounce at the end your pitch and throttle curves are off.
Another thing to do is put the 13t back on. That HK motor is only efficient at 90% just like the 500mx. The older 500 motors were happy back down around 75 and 80% Just need to find the sweet spot.
Won't there be very little room for the governor to adjust the headspeed at 90% though?