To determine the “heavy point”, the trial weight of 500 g was placed on the first blade of the main rotor.
After that, the unbalance vector shifted very little in phase, which signifies that the corrective weight is to be placed around the angle of the first blade. It was calculated that the mass of the corrective weight is 1980.14 g and the angle of its placement is 12⁰.
The corrective weight was split onto two nearby blades:
- 1803.1 g on the first blade (the actual weight mounted - 1800 g)
- 432.88 g on the second blade (the actual weight mounted - 400 g)