I use to balance all my props very thoroughly, but since I got into high performance electrics I`m not able to balance the tiny 4.1" to 5" props. They are so light-weight that they don`t move at all on my magnetic balancer, making balancing impossible. Maybe they all are perfectly balanced from the mold? I have began to just slap them on and fly, I have not experienced any problems or vibration to speak off so far. I turn these props from 28 000 rpm to 42 000 rpm static. Too little mass I think, to make a difference.


Edit: This is me flying my Zagi Typhoon 430 in the early days of development, it is faster now One shold think that these props would need to be balanced, but maybe they aren`t so bad to begin with.

http://www.youtube.com/watch?v=N_1uW_Ix8cs


Yeah, I know this isn`t glow, but I feel it fits this balacing thread somehow

Bottom line is that I agree that a small imbalance of a small washer on the output shaft turning about 9-12K propably will not be noticed at all