crop duster,
Here goes (these are for tail rotor not for props):
1. You would usually expect to be close after about 3 runs. This depends on the condition of the bearings in the hub.
2. This is a bit subjective really. It will extend the life of your tail rotor components or prevent premature failure, but it is always very hard to prove.
3. We have our own balancing equipment
4. See Q.3
5. Every 100 hours or Annual Inspection.
A Bell 47 tail rotor is not a complicated thing to balance. I am not familar with the equipment that you have, but follow the procedure step by step, and it does work quite effectively.
Please PM me if you need any further advice!
Good Luck!!!
