How is done the static balancing of a propeller?
The first common belief to correct is that static balancing depend on the momentum of the blades not their actual weight. It means that when you receive your set of blade, weighing them isn’t going to tell you if they have been statically balanced together; a difference of weight doesn’t generate any vibrations, only a difference of momentum does, which also mean that the static balancing process requires a specific bench. After the moulding process, the blades are grouped in set of 2 or 3 blades according to their momentum. Then a specific static balancing bench is used to bring the blades to the same momentum. The reference blade is the heaviest one, that one will not be altered. Metallic weights are added in the foot of the lightest blades so as to obtain identical momentum for all blades which are then going to constitute a propeller. The blade number is then marked on the foot of the blade, with this number we can find out the full reference for any blade, and this reference tells
