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Upper Main Rotor Blade Tracking Adjustment
Caution: Be sure to maintain a safe distance from the helicopter (approximately 10–15 feet) when
tracking the Upper Main Rotor Blade.
Your Blade CX3 MD 520N is equipped with an adjustable linkage between the Stabilizer Flybar and Upper Main
Rotor Blade . This linkage allows you to adjust the tracking of the upper main rotor blade for smoother and more
stable flight performance .
• You can check the upper main rotor 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 blade tracking .
• Once the main rotor blades have been brought up to speed, note whether the tips of the upper main rotor blade
are tracking in the same plane or not .
• If the tips are not tracking in the same plane, power the helicopter down to make adjustments to the adjustable
linkage. You can start by turning the ends of the linkage in one-half to one-full turn at a time. Power the helicopter
up again and re-check the blade tracking .
If the tracking has improved, continue to turn the ends of the linkage in one-half to one-full turn at a time until the
tips are tracking in the same plane .
If the tracking has become worse after first turning the ends of the adjustable linkage in, turn the ends of the
linkage back out one-half to one-full turn at a time . If the tracking then gets better, continue to turn the ends of
the linkage out one-half to one-full turn at a time until the tips are tracking in the same plane .
Typically, not much adjustment should be necessary to properly track the tips of the upper main rotor blade .
However, due to the small size of the linkage ends and threaded rods it may not always be possible to achieve
absolutely perfect blade tracking . Don’t worry as the helicopter will still perform well as long as the blade tracking is
adjusted as closely as possible .
Note:
It will not be necessary to adjust the Lower Main Rotor Blade tracking as fixed links are used between the
rotor blade and swashplate .
Tips Out Of Track—
Adjustment Necessary
Tips In Track—
No Adjustment Necessary
