INSTALLING A HEADING HOLD GYRO IN THE AXE CP

INSTALLING A HEADING HOLD GYRO IN THE AXE CP
™
INSTALLING A HEADING HOLD GYRO IN THE AXE CP
Items Needed:
❏ (1) Futaba® GY240 AVCS Gyro (FUTM0809)
❏ (1) Great Planes® ElectriFly™ C-12
Micro Brushed ESC w/BEC (GPMM2015)
❏ (1) W.S. Deans® Micro 2R Plug (WSDM3007)
(for C-12 ESC)
❏ (2) Small Tie Wraps
Optional Items:
❏ (1) Great Planes LiPo 910mAh 11.1V 3s 15C
Discharge Deans battery (GPMP0815)
❏ (1) W.S. Deans 2-Pin Ultra Plug™ WSDM3001)
Tools:
❏ Solder and Soldering Iron
❏ Wire Cutters
❏ Solder a Micro Deans plug onto the motor wires of the
C-12 ESC as shown. The negative (-) motor lead (blue
wire) connects to the male pin on the connector. This will be
connected to the tail motor in a later step.
Installing a heading hold gyro into the Heli-Max™ AXE CP™
will make the model easier to fly. The gyro will now allow you
to focus your concentration on the other controls instead of
constantly flying the tail.
We highly recommend using the optional Great Planes
LiPo 11.1V 3s 15C battery (GPMP0815) for the best overall
performance. This battery provides a longer flight time and
higher power output in comparison to the stock NiMH battery.
❏ It will be necessary to solder the E-Board and C-12 ESC
to the battery connector as shown above. If you decide to
use the Great Planes 910mAh LiPo battery (GPMP0815),
we suggest installing a Deans Ultra Male Plug onto the ESC
and E-Board to match the connector on the battery pack.
The Deans Ultra Plug will better handle the increased current
draw of more aggressive flight as your skill level advances.
INSTALLING THE GYRO
❏ Using wire cutters, remove the Deans Micro connector from
both battery input leads on the E-Board and the C-12 ESC.
Remove 1/4" [6mm] of wire insulation from both the positive (+)
and negative (-) leads of the C-12 ESC and E-Board.
❏ Compare the battery pack connector to the ESC connector
❏ Use alcohol and a paper towel to remove any grease or
mold release agents on the gyro and helicopter frame. Apply
the double-sided foam mounting tape included with the gyro
to the bottom of the unit. Carefully align the gyro as shown in
the picture and mount the gyro onto the helicopter frame.
and verify the polarity is correct before soldering. Twist and
solder together the positive battery lead from the C-12 ESC
and the positive lead from the E-Board. Slide the supplied
heat-shrink tubing (included with the Deans Ultra Plug) over
the wires and solder them to the Deans connector. Repeat
for the negative lead. Slide the heat-shrink tubing up the wire
to the plug. Use heat to shrink the tubing.
❏
Disconnect the tail motor plug as shown above and
connect the plug directly into the blue and white motor wires
on the C-12 ESC.
❏ On the gyro, set the “AVCS” switch to “ON” and set
the “DIR” switch to “REV”. Set the gain to 60% using the
adjustment dial on the gyro. If necessary, adjust the gain to
match your flying style or desired setup. The typical range of
gain is 50% to 75%.
Review your work and verify that none of the wires can
get caught in the main rotor gear or the swash plate. The
helicopter is now ready for the test flight.
FLIGHT INITIALIZATION
❏ Since the E-Board provides power to the receiver and servos,
the BEC in the C-12 ESC must be disabled. Carefully lift up
the plastic tab on the C-12 ESC connector, remove the red pin
from the plug, and fold it back over the wire. Wrap a piece of
electrical tape or heat-shrink tubing around the connector pin
and wire. Plug the C-12 ESC into the GY240 gyro.
If this is your first time flying a heading hold gyro, be sure
to take your time and become accustomed to the new gyro
before jumping into your normal flying routine.
Turn on the transmitter, center the tail rotor trim tab, extend
the antenna, and verify the idle up switch is “OFF” (toward
the back of the transmitter). Connect the flight battery and
allow the gyro 10 seconds to initialize. The helicopter and tail
rotor stick must remain still during this process.
ARMING THE TAIL ESC
The tail motor ESC must be armed before each flight. The
best time to do this is after you place the helicopter on the
ground before taking off.
❏
Remove the orange wire from the receiver and plug the
GY240 into the same position. Verify the black wire (-) on the
connector is towards the outside edge of the receiver. Now
plug the orange connector into the next available position on
the receiver (channel 5), and align it with the column of white
wires on the other connectors.
You will hear three beeps from the tail ESC once the gyro has
initiated. Carefully apply full right tail rotor and you will hear
4 beeps. Apply full left tail rotor and you will hear another set
of beeps. The tail ESC and motor are now armed and you
are ready to fly. If you need to pick up the helicopter, firmly
hold onto the main frame since the tail motor could operate
at any time. You can hold full left tail rotor on the transmitter
to prevent this from occurring.
FLYING
If the tail wants to drift slowly due to wind gusts, your gain
may be set too low. Increase the gain a small amount and
see if performance improves.
If the tail has a tendency to oscillate from left to right,
your gain may be set too high. Reduce the gain and see if
performance improves.
❏ Use two tie straps to attach the gyro wires to the frame. Bundle
the wires and ESC together at the front of the helicopter.
© Copyright 2007
HMXZ7001 for HMXE04xx
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