Century Helicopter Products Hummingbird Elite 3D Pro Buku Petunjuk - Halaman 7
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Juga untuk Century Helicopter Products Hummingbird Elite 3D Pro: Manual Perakitan dan Instruksi (12 halaman)
Halaman Cetak
Section 8
ROUTING THE ANTENNA
To provide the best possible reception for the model, the Hummingbird Elite comes with a plastic tube for routing the antenna. Put a small
hole in one end and pull the antenna all the way through leaving about 2 to 3 inches of slack. Wrap the antenna around the tube. After the
antenna is almost completely wrapped around the plastic tube place a hole at the other end of the tube to secure the end of the antenna.
The Hummingbird Elite series helicopters have brackets in the landing gear for mounting this plastic tube.
Place a hole
here using a
thumb tack.
MOUNTING THE BATTERY
The 3D pro is provided with 2 battery mounting standoffs. Place
the battery against the standoffs to test alignment and reinforce
the battery with a small amount of double sided tape or industrial
strength velcro so the battery does not shift.
The battery holders slide back and forth on the lower frame so you
can adjust the center of gravity on the helicopter.
To test your results hold the helicopter by the flybar (flybar should be
90 degrees from tailboom). Move the battery to have the helicopter
sit level or very slightly nose heavy.
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 (FROM A VERY SAFE DISTANCE, MAKING SURE TO WEAR
EYE PROTECTION).
2. Only one rotor blade should be visible, if there are two distinctive blades then the tracking linkage must be changed. Observe which
blade is tracking above the other by marking one first. Carefully remove the ball link on that blade grip and shorten the link by one
complete turn.
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TROUBLESHOOTING QUESTIONS AND ANSWERS
Q: Everything is on and connected. Why won't the rotors turn?
A: -The throttle may not be set in the transmitter or a connection may be loose or disconnected.
-Be sure to follow the guidelines given for the speed controller. Your transmitter or speed controller programming may have to be adjusted for use with
an R/C helicopter.
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 improperly.
-You may simply need to adjust a few settings in the transmitter for additional sensitivity.
-Check the connections to the receiver to make sure connections are correct. If the problem persists take a look at the direction the rudder servo
moves when the gyro is activated in relation to the tail rotor pitch.
-Check the pitch control linkage on the tail rotor from endpoint to endpoint making sure the blades have enough pitch and pitch enough in each direc-
tion.
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.
-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 espe-
cially near the tip the helicopter may not lift properly.
-Check to make sure nothing is rubbing against the main gear possibly slowing its RPM.
-Observe the travel of the collective. Based on varying climates and altitude conditions your endpoint positions may need to be modified to give it ad-
ditional pitch. OR:
-You may have too much pitch. Too much pitch will lower your head speed to a point too low to lift the helicopter. Use the throttle and pitch curve set-
tings in your transmitter to find the best rotor head speed and pitch for at least 3 points on the pitch/throttle.
Q: Why is it so difficult to move the helicopter backwards (or any direction)?
A: -Check all servo movement when the helicopter is in motion and stationary. You are looking for any control input that causes the servo or pushrod in
that area to get caught or bind. After discovering any bind eliminate it by adjusting servo travel or pushrod length. (it is unnecessary to increase the
length of any pushrod or the travel on any servo to a point that may cause binding.)
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, micro-
waves, electric tools and other R/C models can add to the field of interference affecting your model. Try turning off unnecessary 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.
-Mount the electronics in the front of the helicopter to avoid being tail heavy. Having the helicopter slightly nose heavy helps improve forward flight on a
helicopter (R/C or otherwise).
Tips, Blade Tracking, Q & A
Very Bad!
Better!
Place a hole
here using a
thumb tack.
Moving the battery back or forward
will help adjust center of gravity
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