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06-08-2013, 07:45 AM | #1 (permalink) |
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Join Date: Jul 2012
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High pitch noise from 700-395-14s
Converted my 770 Goblin to 14s with KDE 700-395 was doing some test flights
went into a forward back elevator loop,right about time it got through the loop motor cut out an was making a LOUD high pitch noise all the way to the ground motor setting were 18* timing,12 PWM,Head SPd1850,running a 24 tooth pinion any ideas what to adjust so this don't happen again,Oh yea Running a YGE 160hv motor was HOT ESC normal temp |
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06-08-2013, 10:02 AM | #2 (permalink) |
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Join Date: Feb 2012
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High pitch noise from 700-395-14s
Did you record any sort of log?
Have you pulled the motor to check the bearings? What have you done for post flight inspections?
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06-09-2013, 10:13 AM | #3 (permalink) | |
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Thread Starter
Join Date: Jul 2012
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Quote:
my yge when i got to it all was quite exept the normal tail servo noise(chadder). was talking to a guy at local HS he was explaining that it sounded to him like the PWM needs to be lowerd.This was a serious squeel,but now motor seems like it runs ok,I am going to set pwm at 8,like my kde700-495 on my whiplash. Dude was explaining Pwm of motor and the load on motor relationships.it's not as simple a discussion as one would think.the motor pulled a VERY tight back elevator loop all on it's own with very little collective,so what he was saying made sense.at least it only did about 300-350.00 in repairs,i don't think i can bet that |
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