Protech ZOOM 425 ccpm Specifications Page 117

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1. Loosen the main blade grip bolts so the main blades move freely.
2. Hold the helicopter so the right side or left side is facing down.
3. Turn the main rotor hub so the blades are parallel to the ground.
4. Tighten the blade grip bolts just enough so the blades won't droop much when the heli is
lightly shaken. If you overtighten the main blade grip bolts, then the main rotor blades will
not straighten out at full headspeed and this will cause vibration.
If you have too many boom strikes later, you can tighten the blade grip bolts after running
up the heli to full headspeed to ensure the blades have straightened out.
13.3.3. Flybar paddle setup
This step is not necessary for the Corona since it is already performed by the instructions in
the construction manual. The tilt of the flybar paddles should match the tilt of the swashplate.
This is done by adjusting one flybar paddle at a time.
1. First, make sure the flybar paddles are parallel to each other. This can be done using the
KSJ-624 paddle gauge or just by visual inspection. If the paddles are not parallel to each
other then loosen the paddle mounting screw or setscrew and twist the paddle and retight-
en the screw.
If you use the KSJ-624 paddle gauge on a micro heli, the weight of the paddle gauge will
twist the paddle and change the pitch by a few degrees. To avoid this, hold the heli so the
flybar is perpendicular to the ground and then sight along the edge of the paddle gauge
down to the ground. This will prevent the weight of the gauge from twisting the paddle.
2. Next, rotate the main rotor so the main rotor blades are aligned with the body, e.g. one
points forward and the other points backwards.
3. Pick one flybar paddle, and lower it slightly so it almost obscures the swashplate. Now
align the outer edge of the flybar paddle with the top of the swashplate. It should be level
with the top of the swashplate. If the paddle is tilted relative to the swashplate, then this
should be fixed by shortening or lengthening the linkages between the swashplate and the
flybar paddles
4. Now rotate the rotor head 90 degrees so the flybar paddles are aligned with the body.
Check the same paddle against the top of the swashplate again. It should still be aligned.
5. Repeat the last two steps for the other flybar paddle and make sure it is aligned with the
top of the swashplate at two different angles 90 degrees apart.
13.4. Main motor setup
13.4.1. Transmitter throttle reverse setup
If you have a Futaba transmitter and a Castle Creations or Schulze ESC, then you will need to
reverse the throttle for this step. The throttle reverse may be necessary for other transmitter
and controller combinations as well.
13.4.2. ESC programming
Helicopter and Transmitter Setup
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