BMI CarbOOOn CP, Руководство пользователя

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Push-rod B to aileron servo (1)
Push-rod C to aileron servo (2)
Swashplat (outer ring)
Swashplat (inner ring)
Paddle control link
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Push-rod A to aileron servo
Angle of attack and lift decreases
Flying bar turns
Pitch increases
Pitch increases
Centre hub
R otor H ead
Angle of attack and lift increases
Pitch decreases
Pitch increases
Pitch control link
4
6
(B) Actual parts
3
2
5
1
7
8
1.Paddle 2.Rotor head 3.Pitch control link 4.Paddle control link
5.Main blade 6.Centre hub 7.Swashplate 8.Push-rod to servo
The center hub is fixed on the main shaft and revolves together with it. But, the center hub is not allowed to slide up or down on the shaft. Nevertheless,
the rotor head can revolve together with the shaft and also can slide up or down on the shaft.
Referring to Fig.(2-A), when you push the throttle stick forwards on the CCPM transmitter to increase the motor speed, the three push-rods (A), (B) and
(C) will simultaneously move downwards and pull the whole swashplate down as shown by the
solid arrows. Hence, the two pcs of paddle control link
(connected to the top swashplate) will pull the whole rotor head downwards. And, the two pcs of pitch control link will move down along with the rotor head
and turn the two main rotor blades in opposite direction. Thus, the pitch of both blades will simultaneously increase the same degrees. This is the so-called
the Collective Pitch Control System. ( “Collective” here means “a group together” because the two main blades increase or decrease the pitch angle the same
degrees.)
On the other hand, when you move the aileron stick to the left, the push-rod (B) will move downward while the push-rod (C) move upward. Hence, the left
side paddle control link pushes upward while the right paddle control link pulls downward as shown by the
dotted arrows. The flying bar together with the 2
paddles will turn in the same direction. Please be noted that, in this way, one paddle increases its angle of attack and lift while the other decreases. The lift
difference makes one paddle rise up and the other drop down. So, the pitch control link on the rising side moves upward while that on the dropping side
moves downward. Thus, the two pitch control links cause the two main rotor blades to turn in opposite direction as shown by the
dotted arrows. The pitch
as well as lift of one blade increases while the other decreases. This is the so-called the Cyclic Pitch Control System. ( “Cyclic” means “happening in a
regularly repeated order” because the pitch of each blade changes from min to max in a regularly repeated way while revolving in a complete cycle.)
The difference between the lift on the blade makes the “rotor disc” slanted and tilt sideways. In fig (2-A), since the pitch as well as the lift on the right
blade are greater than those on the left blade, the “rotor disc” as well as the resultant lift on it will tilt towards left, which results in that the helicopter
flies side-ways toward the left.
The above shows how the cyclic pitch control system works to make the helicopter fly sidewards. Similarly, if you should push the elevator stick
forward or pull the stick backwards, the helicopter would fly forward or backward. Be careful, should you push or pull the elevator stick too much,
the helicopter would dive or do loops.
Since the RTF (or ARF) mini heli is virtually assembled at the factory, including installation of the servos, battery pack and the radios, what you need to do
is to fully charge the battery pack before adjusting and flying.
Nevertheless, if you are to purchase only the KIT or ARF model, you have to first do installations bu yourself as shown in Fig.(3) below:
1. Use double-sided adhesives to glue the elevator servo and 2 aileron servos in place.
2. Use double-side adhesives to glue the “4 in 1” Control-box (or the “3 in 1” Control box plus your own mini receiver) on the surface of the plate in
the front of the main frame.
3. Make sure that the monitor lamp (3) and the two trimmers (1) & (2) are facing you as shown for easily accessible.
4. Use the push-rod (A), (B) and (C) to connect the elevator servo and the two aileron servos respectively to the bottom swashplate as shown in Fig.
(2) and Fig.(3).
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5. Place the battery pack between the front and the rear battery-holders and fix it with a rubber band. To shift the battery pack fore and aft you
can adjust and get the proper C.G. position at and beneath the main rotor shaft.