RCU Forums - View Single Post - ESC braking. Truth vs. perception. Please help!
Old 09-19-2011 | 10:12 AM
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Jetdesign
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Default RE: ESC braking. Truth vs. perception. Please help!

Hi Scott,

Couple of things: one of my mentors suggested that anything below 80% brake on the 85HV doesn't do much. If you have your brake on and prop is accelerating, the brake strength is too low. I had/have about 96% brake on my ICE HV80 and it keeps prop from revving in down lines, stops prop on landing.

For motor spinning/stopping, it takes more energy to start a motor spinning (overcome resistance/friction, etc) and thus motor start throttle is higher than motor stop throttle position (just learned this myself not long ago).

I have started flying with a 'flight idle' and have my brake on a switch, similar to post above. If you use your trim to set up an idel rpm, the motor will essentially work as a brake to keep this rpm in down lines; it will not let the prop spool up.

So, either try increasing the brake, or actually keeping a few clicks of throttle on.

As the original post says, there are a lot of thoughts/opinions/etc on what is the best braking method. For me, the brake seemed to work OK, but throttle on after braking was not a smooth transition, sometimes made noise, and going from stopped prop/no wind to moving prop is a significant transient.

With a nice size prop and low idle rpm, my plane still slows down nicely, does not accelerate in down lines, and really is a lot smoother through looping maneuvers.