To help your model to respond smoothly and to minimize any rotor head vibration, you can easily adjust the main rotor blades. Balancing the blades is not required, but the included decal sheet includes tracking tape. As the rotor blades spin, if they appear (when viewed from the side) to be tracking in line, the blades will appear as a single disc with one tip at each edge. No adjustment is required. If, however, you can see a disc with two tip edges (one on top of the other), you need to adjust the tracking.
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