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ESC › CC Governor Warning
02-22-2014 05:34 PM  3 years agoPost 1
rudyy

rrElite Veteran

E. Amherst, NY

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I have heard that CC is more conservative in the governor mode. So, is it normal to set the RPM in the range that gives the governor warning?

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02-25-2014 02:01 PM  3 years agoPost 2
Richardmid1

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Leeds, England

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The yellow warning yes or around 95% throttle (not actually 95% though). I find it more efficient and less violent which makes it easier on the tail also.

60% of the time, it works every time!

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02-25-2014 02:22 PM  3 years agoPost 3
Pistol Pete

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Seffner, FL

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No, its not normal. The warnings are there by design, thus for a reason.

Thats what countless threads about gearing for the head speed youre after are all about...efficiency.

Read your data log. Specifically the power output where you shoot for the mid 90%. If its pegging at 100%, the gearing and or settings are not at their most efficient possibility...when using governor.

Main goal is to get the most out of your set up. If its not your goal, then

Data logging is your best "efficiency troubleshooting" tool.

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02-25-2014 02:33 PM  3 years agoPost 4
Richardmid1

rrProfessor

Leeds, England

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Yeah sure if its pegged at 100% most of the time but going to 100% output during power hungry manouvers especially towards the end of the flight is fine.

Even Bert Kammerer runs setups into the yellow governor warning on CC ESC's and says they still govern fine and from experience I happen to agree with him.

If you were to run a heli right in the middle between low head room and high head room warning the heli would be seriously over geared and THATS inefficient and I sometimes wonder if its partly to blame for all the fires and the reason people complain of seeing huge current peaks in the data logs!

60% of the time, it works every time!

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02-25-2014 03:59 PM  3 years agoPost 5
Pistol Pete

rrProfessor

Seffner, FL

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Great to know its performing for Bert as well as others. Would love to see those logs.

Yes, it can be done but its really not the "norm".

Agree on the low end. The start up seemed to be the main killer. You can see it on the battery ripple log as well.

On my latest electric project I was after the longest flight time for a given max head speed with motor output >90% but <100%. Once there and averaging 93%, I programmed the other two lower head speeds at 75rmp difference from each other. The battery ripple as well as mAh consumption went higher while motor output <85% negating the main goal and confirming how hard the start up is on the ESC.

On the other hand once you reach 100% = no more headroom in gov mode= reduction in efficiency (bogging if over pitched) = higher amps = shorter flight time = harder on the lower C batts which are lighter and cost less which can perform just as well for given application if you gear and pitch for them accordingly.

Finally theres telemetry to confirm the data log info. Best tools hands down when playing with electrics.

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02-25-2014 04:11 PM  3 years agoPost 6
Richardmid1

rrProfessor

Leeds, England

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But by hitting 100% occasionally means the gear ratio is higher (smaller pinion), therefore lower current draw and longer flights. The bogging in this instance is not a strain on the motor from asking it to do too much but rather that it has just run out of rpm.

60% of the time, it works every time!

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02-25-2014 04:15 PM  3 years agoPost 7
JKos

rrProfessor

Redondo Beach, CA

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> reduction in efficiency (bogging if over pitched)

That is an incorrect association. If you adjust gearing to have the same headspeed at 85% or 100%, the 100% setup will be more efficient.

- John

RR rules!

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03-04-2014 04:14 PM  3 years agoPost 8
Pistol Pete

rrProfessor

Seffner, FL

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Agree...100% is most efficient.

Keep in mind that what Im refering to (the story as a whole) is too high a gov set up with no more head room with an over pitched set up while seeking longer flight times.

Data logs helped seeking such...for me.

~~Enjoying the hobby one flight at a time~~

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03-05-2014 02:57 AM  3 years agoPost 9
rexxigpilot

rrProfessor

Florida

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I have heard that CC is more conservative in the governor mode. So, is it normal to set the RPM in the range that gives the governor warning?
The short answer is yes. The CC RPM too high warning in set RPM governor mode is not the optimum place to set your headspeed. Run it slightly higher for better efficiency and less peak current draw. I shoot for about 85-90%. The worst that will happen if you set it "too high" is you will lose some RPM during pitch heavy, high load maneuvers and near the end of flight when the pack voltage is lowest.

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