Log, Motor most time at 100%

[nivaldin]

Hi guys,

How is your log? is good?

I think my helicopter is using all power of the motor to try to keep the RPM that I set!

My setup is:

-Logo 600sx
-10s battery
-12T pinion
-106T main gear
-CC ICE2 Phoenix 80A
-2200rpm

Thanks.

[RedOctobyr]

You might just need different gearing, like a 13T pinion. They use the term "Motor Power Out", but that does not really mean it is the most *power* that the motor can produce. The motor's KV rating will determine how fast it can spin, even with no load.

If you are at 100% Motor Power Out by the end of a pack, even if you're flying fairly gently or hovering, then the pack voltage has simply dropped too far to let you maintain the headpseed set in the governor, with your gearing.

If your motor, ESC, and packs are not already too warm, I would go to a larger pinion. I'd expect you would be able to maintain the headspeed much better. Be aware that you will lose some torque (due to the higher gearing), and the current that you draw from the ESC & packs will likely climb. But you should be able to maintain a more consistent headspeed.

[ahahn]

Motot power out means that the ESC is running WOT.

So for that Kv, that Pack Voltage, and that gearing, your headspeed is simply too high.

Red October is correct, it isn't the max power, that is determined by the load you put on the motor. Going up a tooth on the pinion will up the power, and draw more current, and run a higher headspeed. As long as your components can take it, that is.

[nivaldin]

Originally Posted by RedOctobyr

You might just need different gearing, like a 13T pinion. They use the term "Motor Power Out", but that does not really mean it is the most *power* that the motor can produce. The motor's KV rating will determine how fast it can spin, even with no load.

If you are at 100% Motor Power Out by the end of a pack, even if you're flying fairly gently or hovering, then the pack voltage has simply dropped too far to let you maintain the headpseed set in the governor, with your gearing.

If your motor, ESC, and packs are not already too warm, I would go to a larger pinion. I'd expect you would be able to maintain the headspeed much better. Be aware that you will lose some torque (due to the higher gearing), and the current that you draw from the ESC & packs will likely climb. But you should be able to maintain a more consistent headspeed.

Thanks for the answer... What if I start using 12s pack?

[RedOctobyr]

That would make an even larger difference/improvement, vs going up 1 tooth on the pinion. This assumes your motor, etc, can handle 12S. The Motor Power Out should drop.

Enter the new voltage into the Castle software and see what it says about the Set RPM values you are using now, with the 12T pinion.

It is possible to go too far in the other direction, so that now the Motor Power Out is only 60% or something, and starts to overheat the ESC. You could always try 12S, then review/post the log. Worst case you'd want to go down to maybe an 11T pinion.

[nivaldin]

Originally Posted by RedOctobyr

That would make an even larger difference/improvement, vs going up 1 tooth on the pinion. This assumes your motor, etc, can handle 12S. The Motor Power Out should drop.

Enter the new voltage into the Castle software and see what it says about the Set RPM values you are using now, with the 12T pinion.

It is possible to go too far in the other direction, so that now the Motor Power Out is only 60% or something, and starts to overheat the ESC. You could always try 12S, then review/post the log. Worst case you'd want to go down to maybe an 11T pinion.

I printed the software screen to show you that now it shows 86% of full power output, instead of 105% when using 10s.

86% will be good for 3D maneuvers?

[RedOctobyr]

I'd expect that will be good, it will hold the RPM much better. Fly it and see what the logs show. You could always go to a smaller pinion, to gain additional torque, and raise your Motor Power Out, if it was now too low.