Century Helicopter Products Hummingbird Elite Series CP Gebrauchsanweisung - Seite 9

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Century Helicopter Products Hummingbird Elite Series CP Gebrauchsanweisung

Section 6

ADJUSTING THE BLADE TRACKING

Tracking Adjustment

1. Tracking refers to trimming the actual pitch of the main rotor blades to be equal. On the first flight, bring the rotor head up to speed

without leaving the ground and look at the side or profile of the rotor disk.

2. Only one rotor blade should be visible, if there are two distinctive blades then the tracking linkage must be changed. Observe which

blade color is lower and carefully remove the ball link on that blade grip and shorten the link by one complete turn.

Both blades should track in the same line A=B.

TROUBLESHOOTING QUESTIONS AND ANSWERS

Q: Everything is on and connected. Why won't the rotors turn?

A: -The throttle trim may be set too high try moving the trim to the lowest point.

-Your gyro may be installed incorrectly make sure the the order of wires is as shown on page 4.

-Your throttle channel may be reversed.

Q: Why does the helicopter spin like a top?

A: -It's possible that the rudder channel on your radio is reversed or your gyro is installed upside down. Please see page 8 for best

mounting location.

-Check the connections to the receiver to make sure connections are correct. If the problem persists take a look at the direction the

tail motor turns.

-The curved portion of the tail rotor should move forward being the "leading edge". If this is not the case please check the polarity of

the motor's connection to the mixer board.

Q: Why is there vibration?

A: -The main blades may be out of track. Refer to the blade tracking information above.

-The main shaft may be bent. This can be difficult to notice when the blades are not moving. A bent main shaft can be caused in a

crash or a hard blade strike.

-Vibration can also result from any loosely connected components such as the battery tray or the landing gear. Make sure to secure

them and be sure to check the frame and flybar every time you crash or have a hard landing as they may need to be repositioned.

Q: Why won't the helicopter come off of the ground?

A: -Be sure that the gear mesh on the main motor moves smoothly and that the battery is fully charged. Do not fully discharge a NiMH

type battery as it will lose it's capacity memory.

-If you don't think it's the battery it's possible that slightly damaged blades are reducing the possible lift. If there is a part of the blade

broken off especially near the tip the helicopter may not lift properly.

-Check to make sure nothing is rubbing against the main gear possibly slowing its RPM.

Q: Why is it so difficult to move the helicopter backwards?

A: -The elevator servo may be installed too far to the rear. The servo may have to move forward in its mount so the servo arm will clear

the rear of the frame.

Q: Why does the helicopter operate on its own without my command inputs?

A: -You may be getting hit with interference. RF interference can occur for many reasons. Ordinary household electronics, televisions,

cell phones, microwaves, electric tools and other R/C models can add to the field of interference affecting your model. Try turning off

unnessesary electronics or find an area where there are less electrical disturbances.

Q: Why does the helicopter still move too far forward or backward even after adjusting the servo arm positions and trims?

A: -The helicopter may not have an even center of gravity. You can slide the battery in it's mounting tray to adjust it's center of gravity.

-You can also combine your battery weight centering with trims and servo arm positions to get any desired combination.

During regular operation the Hummingboard will remain solid green but as the battery starts to run out and the voltage drops the

helicopter will simply descend. At this time it is best to land immediately.

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acking / Q & A

Blade tr

ade tracking / Q & A

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acking / Q & A