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Gyro Gain Adjustment
• If the tail wags or oscillates, lower the gain on the gyro.
On your transmitter's gyro menu, decrease the gyro gain values a small
amount at a time until the helicopter is stable within a particular flight
mode
Blade Helicopter Belt Tension
Belt tension that is too tight results in loss of power and causes the belt to
wear more quickly. Tension that is too loose can cause belt damage and loss of
tail rotor control in flight.
To check for proper belt tension:
1. View the tail rotor drive belt through the opening at the back of the main
frame.
2. Use a hex wrench or standard screwdriver to compress the belt through the
opening.
3. Apply light pressure on the belt, compressing the belt toward the left side
of the tail boom.
4. The belt tension is correct if the compressed side of the belt reaches ap-
proximately halfway to the opposite side of the belt.
a. If the compressed side of the belt reaches farther than halfway to
the other side of the belt, the tension is too loose.
b. If the compressed side of the belt does not reach halfway to the
other side of the belt, the tension is too tight.
Post-Flight Inspections and Maintenance
Make sure the plastic ball link holds the control ball, but is not tight (binding) on the ball. When a link is too loose on the ball, it can separate from the ball
Ball Links
during flight and cause a crash. Replace worn ball links before they fail.
Cleaning
Make sure the battery is not connected before cleaning. Remove dust and debris with a soft brush or a dry lint free cloth.
Bearings
Replace bearings when they become notchy (sticky in places when turning) or draggy.
Wiring
Make sure wiring does not block moving parts. Replace damaged wiring and loose connectors.
Make sure there are no loose screws, other fasteners or connectors. Do not over tighten metal screws in plastic parts. Tighten screw so parts are mated
Fasteners
together, then turn screw only 1/8th of a turn more.
Make sure there is no damage to rotor blades and other parts which move at high speed. Damage to these parts includes cracks, burrs, chips or scratches.
Rotors
Replace damaged parts before flying.
Make sure the AR7200BX is securely attached to the frame. Replace the double-sided tape when necessary. The helicopter will crash if the AR7200BX
Gyro
separates from the helicopter frame.
• If the tail is drifting while hovering, increase the gain on the gyro.
On your transmitter, increase the gyro gain values a small amount at a time
until the tail starts to wag/oscillate. Afterwards, reduce the gain until the
tail stops wagging/oscillating within a particular flight mode.
To adjust belt tension:
1. Loosen the two horizontal stabilizer screws.
2. Loosen the four screws at the back of the main frame.
3. Slide the boom forward or aft to adjust the belt tension.
4. When the belt tension is properly adjusted, tighten the four screws at the
back of the frame.
5. Tighten the horizontal stabilizer screws.
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