Whistling Sound

[GustavL]

Hi, I have noticed a slight whistling sound when flying.
I have checked props and motors. All looks fine. Have done about 90 flights with the PV2+.
Apart from the that it flies like a dream.
Anything I should investigate or worry about? :?

 

[Green_Phantom]

Do you ever oil your motor bearings?

 

[GustavL]

No, not yet? Should I, and what must I use?

 

[dbooty]

Sewing machine oil works well as it's nice and fine and doesn't seem to be a dust magnet

 

[Green_Phantom]

If your motors are whining, you might have already fried the bearings. Although you could prolong their death by oiling them as soon as possible.

Hit up your local RC hobby shop and ask them for some bearing oil.

Or look around online. There are thousands of places to get some. I like Amazon myself
http://www.amazon.com/Racers-Edge-3002- ... +motor+oil

Try to get one that has the needle tip on it to make this easy.
Here's a how-to
https://www.youtube.com/watch?v=TNYXs42McqQ

 

[GustavL]

Thanks for the help. Hope that solves the problem.

 

[job2310]

Is there no way to do this without drilling?

 

[flyNfrank]

Can you notice any movement at all outside of the normal rotating movement, like up & down? I get grass debre sometimes and possible dirt from forward tilt when landing.

 

[GustavL]

Is there no way to do this without drilling?

Also don't like the drilling part.

Can you notice any movement at all outside of the normal rotating movement

I don't notice any up and down movement.

Got some oil and a needle and injected a couple of drops in at the top.
Tested without props. Sounds a lot better. Wind is too strong outside to go and test.

 

[Green_Phantom]

If you don't want to drill holes, every 10 flights you can pop the top off the phantom and remove the 4 screws that hold each motor in place to get to the bottom bearing. Much more of a pain if you ask me. But other than those 2 methods, there's no magic way to get to the bottom bearing on these motors.