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FInAl PreFlIght checK
Once all assemblies have been completed, please review the following suggestions before
attempting initial flights.
• Review the instruction book and confirm that all assembly steps have been completed thoroughly.
• Check to ensure that all servos are operating smoothly and in the correct direction. Also verify that there is no
binding in the control rods and that each servo horn is secured with a servo horn mounting screw.
• Check to ensure that all bolts and screws have been completely tightened and secured with threadlock where
indicated.
• Verify that the gyro is operational and compensating in the correct direction.
• Make sure that both the transmitter and receiver have been fully charged (refer to your radio
system instructions for proper charging procedures).
• Check to ensure that the throttle is working properly and in the correct direction.
blAde trAcKIng Adjustment
Blade tracking is an adjustment to the main rotor blade pitch that must be accomplished during the initial test
flights.
Although the blade pitch angle in each blade may appear equal, it is still possible for a set of main rotor blades to
run “out of track,” making adjustment necessary.
Main rotor blades that are out of track with one another can cause vibration, instability and a loss of power due to
additional drag.
On the initial flight, it will be necessary to increase the blade speed to just before lift-off rpm and view the rotor disc
at eye level from a safe distance (approximately 15 to 20 feet (4.7 to 6 meters)).
Note which blade is running low (by colored tracking tape) and increase the pitch of the low blade one turn of the
ball link at a time until each blade runs in track (on the same plane).
Please refer to the diagrams on the following page to identify the different tracking situations, as well as methods to
mark each rotor blade for tracking identification.
Summary of Contents for Vibe 90SG
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