Heli is talking to me, what is it saying ?

[TBur]

getting a strange chirping sorta sound. you can hear it when the heli is close in this video.
[ame]http://www.youtube.com/watch?v=5dqbSev4PlE&feature=plcp[/ame]

when spooled up on the ground it does not make the noise, only after lift off.

its new - < 12 filghts. (for other issues the motor and tophat bearing replaced, most of tail as well - except the slider bearing)

Its been consistent, have not noticed any particular control inputs that change the noise.

Any thoughts on where to start looking to track this down ?

Thanks - Tim

[snaaakeey]

Not too sure if it's the noise your on about but the short group of high pitched pulsing sounds the motor made sounds possibly like too high a gov gain? If you rant running a gov then not too sure? My 6hv has gone through many strange noise changes in it life. Most haven't been a problem.


Sent from The Pad of I

[TBur]

Originally Posted by snaaakeey

Not too sure if it's the noise your on about but the short group of high pitched pulsing sounds the motor made sounds possibly like too high a gov gain? If you rant running a gov then not too sure? My 6hv has gone through many strange noise changes in it life. Most haven't been a problem.


Sent from The Pad of I

I am running the skookum gov, all settings for the gov are the defaults, I'll check into those settings. Thanks

[Grok]

That noise can also be caused by a vibration.

Sent from my Galaxy Nexus using Tapatalk 2

[360Wings]

Sounds fine to me... Just fly..

Play around with the gov. setting.. Gov. setting vary alot depending on h/s, blades, motor torque ...etc... Im running a SK540 and i have the gov gain at 34.

[TBur]

Originally Posted by 360Wings

Sounds fine to me... Just fly..

Play around with the gov. setting.. Gov. setting vary alot depending on h/s, blades, motor torque ...etc... Im running a SK540 and i have the gov gain at 34.

Was reading some posts, seems like low 30's is a good place to start. I'll give that a try tomorrow

[snaaakeey]

I'm running the scorpion 4525le and the highest I can get on the sk720 gov is 29.

Edit. Sorry ! In the 7hv!


Sent from The Pad of I

[alexmit]

This could also be a PWM rate in the ESC that is too low. That can cause chirping under load. I'm not saying that is what it is for sure, but it could be.

[TBur]

Originally Posted by alexmit

This could also be a PWM rate in the ESC that is too low. That can cause chirping under load. I'm not saying that is what it is for sure, but it could be.

Running the hw 70 @ 15, tried 18 and 21 previously, didn't alter the noise, good suggestion though.

Traveling now. Won't get a chance to fly till the end of the week.

Regarding the SK gov gain, tried 30, had gusting winds making enough noise friday that I couldn't say for sure if it helped.

[TBur]

Originally Posted by snaaakeey

Not too sure if it's the noise your on about but the short group of high pitched pulsing sounds the motor made sounds possibly like too high a gov gain? If you rant running a gov then not too sure? My 6hv has gone through many strange noise changes in it life. Most haven't been a problem.


Sent from The Pad of I

I think it was the gov gain. I'm still in process of trying lower numbers, but the pulsing noise is much less now. I'll post what I end up with.

Taking a while, had a crash/ fix... Then road trip where I couldn't try it it till the 6th, then an auto reset at about 6 inches off the ground on re maiden.. I had no Internet access so was not aware of the 3.1 logging issue... Figured maybe the crash had damaged the bec so I ordered a new one and replaced it when I got home.

Was greeted back in Seattle with T storms Friday ;( , got a 3 minute flight in yesterday before it started raining. Argggggg.

Oh well now I have a spare bec...

Tim

[TBur]

Ended up setting the gov gain to 27, no more pulsing noise