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Old 09-09-2016, 02:31 PM   #1
wingnut
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Brushless motor timing


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Hey Gang:
What effect does advancing the timing have on power output on brushless motors?Is there any advantage to be had in advancing the timing and how much is too much?
Regards: Bill
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Old 09-10-2016, 09:28 AM   #2
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Re: Brushless motor timing

question #2
what are we actually doing when we program our timing?? telling the speed controller to release more battery quicker=more power/less efficiency (advance) are we actually gaining RPM? i have a tach, i should check.
I fly Electric Formula 1, and have advanced my timing to max. I'm only in the air for a couple of minutes, 1:20 full throttle.
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Old 09-10-2016, 12:12 PM   #3
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Re: Brushless motor timing

hey Cpaine:
Thanx for the reply. What is max advance in degrees for your formula 1,and when your done your 2 min .flight how much battery is left in % age.
Regards:Bill
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Old 09-12-2016, 10:36 PM   #4
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Re: Brushless motor timing

Advancing the timing will draw more power from the battery. You will see a significantly reduced but more powerful flight.

For the models you have and the battery type you usually fly with you will not benefit.
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Old 09-15-2016, 12:03 PM   #5
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Re: Brushless motor timing

Thanx Dangaras:
Your the only one to post meaningful info.What are the limits? How much advance can a brushless motor stand or is this something you can only discover from testing?
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Last edited by wingnut; 09-15-2016 at 12:25 PM.
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Old 09-15-2016, 08:33 PM   #6
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Re: Brushless motor timing

Quote:
Originally Posted by wingnut View Post
hey Cpaine:
Thanx for the reply. What is max advance in degrees for your formula 1,and when your done your 2 min .flight how much battery is left in % age.
Regards:Bill
Sorry late response....
I think it's 25deg.on a eflite 60amp. My packs are 4cell/2600mah/65c. I have about 35-40% after a race... 1min, 20 sec full throttle. Couple of half throttle cool down laps up high.
Not sure if any of this any help.
Cheers
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Old 09-16-2016, 10:19 AM   #7
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Re: Brushless motor timing

Not sure what ESC 's you are using but when I set up my Castles on the computer to match to the Scorpions they have explanations pop up... If you make adjustments it exoplains what the different changes do i.e. create more heat , use less battery for more duration and so forth. Good stuff. I see now that some of the bigger AXI motors are now coming out with built-in telemetry sensors . Progress ......
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Old 09-16-2016, 11:18 AM   #8
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Re: Brushless motor timing

Also if your motor and prop combo have too much inertia, the motor cant turn as fast as the ESC's timing, causing that cringworthy "Skreeeeek" you hear coming from the motor when you goose the throttle. In that case, you need to reduce the timing so the motor can keep up!!
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Old 09-16-2016, 12:13 PM   #9
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Re: Brushless motor timing

I usually go with what castle recommends when setting the BEC voltage but sure like their explanations when clicking on the little "? " mark. Issue with some of the motor
manufacturers is that they don't give enough motor data for best input. I guess that the parameters may vary too much so that is were the price vs the quality comes in.

Just my thoughts in any case.
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Old 09-17-2016, 09:45 PM   #10
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Re: Brushless motor timing

It you play with timing the best two things you can use are a what's up meter and a thrust gauge. An rpm meter can assist but isn't necessary.

I don't care about props unloading in the air since all the tests are based on ground results.

Start with current timing, measure power, voltage & amps through your flying throttle range.
Repeat with the timing at the next setting and then repeat with the next timing setting and repeat and repeat....

You get the idea. Record you results from the meter. If you want, use a thrust gauge (luggage scale) to record your thrust for each timing setting.

Forget all the blah blah blah. The numbers will tell you what you want to know.

Good luck.
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