Originally Posted by jer291113
This is my first edf plane and have two basic questions.
1. How can you tell if the fan is out of balance?
2. If so, how do you balance it ?
Sorry for such basic questions...but thanks for your advice!
I found with mine that right out of the box, the fans were not clearing the shroud very well, so I had to go in with a Dremel and grind off just enough in those places where they touched. If one or both fans are not balanced, you can sometimes feel it as a vibration when you spin it up or you can hear odd harmonics. If you really want to be sure, then you have to take the fans out and check them on a prop balancer. But then, you won't know if the motors are balanced. To balance the whole assembly becomes a fairly complicated trial and error exercise. These are not terribly high rpm fans, so if they run pretty good at max throttle, just leave them. Besides making clearance for the fans, I did nothing else to them.