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Main Rotor Blade Tracking Adjustment
CAUTION:
Be sure to maintain a safe distance from the helicopter (approximately 10–15 feet) and to wear appropriate eye
protection (such as safety goggles) when tracking the main rotor blades to avoid injury.
Blade tracking is a critical element to the fl ight performance of just about any helicopter, including the Blade SR. Main rotor blades that
are out of track may cause vibration, instability, and loss of power. Although each Blade SR model is test fl own and tracked at the
factory, you may need to adjust blade tracking after blade changes, repairs, or pitch control link adjustments.
To check main rotor blade tracking and make any required adjustments:
• Be certain that the main rotor blades have been properly installed and secured. The main blades should be tightened so they can
pivot in the blade grip when moderate pressure is applied. Never allow the main blades to swing freely in their grips.
• After powering the model on and allowing the 2-in-1 unit and gyro to arm and initialize properly, bring the main rotor blades of your
Blade SR up to speed. You can check the blade tracking either on the ground or in the air at eye level. It might be a good idea to
have an assistant on hand to help sight the blades. Again, be certain to maintain a safe distance of approximately 10–15 feet from
the helicopter when checking the tracking of the main rotor blades.
• Once the main rotor blades have been brought up to speed, note which blade is running low and which blade is running high (by the
colored tracking tape).
Blades Out of Track - Adjustment Necessary
• Power down the helicopter in order to make any necessary adjustments to the linkages. You can increase the pitch of the low blade
by lengthening its pitch control linkage. This is accomplished by turning one of the Ball Link ends out by one-half to one full turn. Or,
you can decrease the pitch of the high blade by shortening the linkage.
Note:
The blade you choose to raise or lower when making tracking adjustments will depend on the pitch of each blade. Because
both rotor blades should be as close to 0 degrees as possible when throttle hold is activated and the throttle/collective stick
is in the middle position, you can easily identify which rotor blade to adjust.
If one blade is “lower” than 0 degrees, raise it to match the other blade. If one blade is “higher” than 0 degrees, lower it to match the
other blade.
