The helicopter in my Raven stated making noise the other day. It happened before, but stopped.
It's hard to describe the sound - sort of like the most annoying noise in the world from Dumb & Dumber, but not as high pitched or as loud.
It makes the noise if it's turned while off. I added some sewing machine oil to the gears & bushings, but it still does it. It sounds like it's coming from the motor structure.
Is there anything I can do? They're out-of-stock at PBR. I'm thinking I'll just de-solder a lead if it gets too annoying.