Okay, I've got a start here. Totally unscientific. Just going with my gut and years of experience building and working on my scoots. I'm totally out of my league here. As we all know, I had a single motor that appeared to have more resistance than the other three motors. I chose to pull the motors and administer a single, minute drop of oil on the shaft of the motors (around the sealed bearings), top and bottom. I cleaned all residual oil off and ran low pressure air to all of the motors, both top and bottom. I worked the oil in, reassembled the bird and spun up the motors. All seemed very good. No more resistance.
At the advice and concern of others that the oil may have an adverse effect on things, I pulled everything apart today, inspected everything thoroughly and put it all back together again. I found no signs of residual oil or spillage on any plastic parts.
I will provide an amateur video of what it sounds like now (I wish I had done one when the problem first surfaced but I didn't). I will use the "feel" from hand, spinning the motors and the sound of this video as a baseline. If my fix works, great. If it doesn't, I'll share the results and everyone will know better. I've got no dog in this fight, I'm just trying to keep my birds in the air in a safe and responsible manner. We'll see what happens.
Jerry
At the advice and concern of others that the oil may have an adverse effect on things, I pulled everything apart today, inspected everything thoroughly and put it all back together again. I found no signs of residual oil or spillage on any plastic parts.
I will provide an amateur video of what it sounds like now (I wish I had done one when the problem first surfaced but I didn't). I will use the "feel" from hand, spinning the motors and the sound of this video as a baseline. If my fix works, great. If it doesn't, I'll share the results and everyone will know better. I've got no dog in this fight, I'm just trying to keep my birds in the air in a safe and responsible manner. We'll see what happens.
Jerry