- Joined
- Dec 18, 2015
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- 191
I'm sorry. I thought that your issue was with the slowest motor. The blue line is the fastest motor. That is also one of the most heaviest loaded. That could mean a bearing in it's very earliest stages. It could also be something about the prop, since you mostly notice it when flying. For some reason the ESC want's to spin the prop faster than the others, which would suggest some prop abnormality. What do you hear with no props?
If you move the props around, does it follow the prop? What about trying a new prop?
The other thing to consider, is that is the motor going fastest. It will probably sound different for that reason.
Well when I am flying, I can't tell where the sound is coming from. So, that is when I brought it home and got the dat file and all that stuff. I also then used the stethoscope to listen to all the motors. I do not have the props on when I hear the noise with the stethoscope. That is when I found the Left Back motor to sound way different than the other three. The other three all sound smooth and fine. The Left Back motor sound I'll have to say, rough like something is hitting or rubbing continuously. When I am outdoors flying, I can't tell where the sound is coming from and it is hard to tell the speed too. I did put a tachometer on my props at home, and the readings with props on are shown below. I also checked the balancing of the props which are not nicked or damaged or tweaked in any way and are balanced both on the horizontal and vertical axis accurately.
Thanks again.