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positions. When you are sure of this, apply a drop of thread-
lock fluid to the grubscrews in the articulated barrels, and tighten
them firmly.
Fig. CH-19
2.11 Installing the electronics
Install the speed controller, the gyro and the receiver on the
left-hand side of the mechanics, as shown in the illustration.
We recommended double-sided foam tape for this, as the
material absorbs vibration, and helps to prevent damage to the
electronic units.
When installing the gyro it is important to orientate it correctly.
Refer to the gyro instructions for more information.
The set is supplied with four cable ties 17 which can be used
to deploy the cables neatly.
Fig. CH-20
3 Completing the main rotor
3.1 Assembling the rotor head
Press the pushrod 56 onto the adjustment lever 60. Push the
swivel link 61 into the rear socket of the adjustment lever and
connect the parts by pressing the 1.5 Ø m6 x 20 mm dowel
pin 111 into place. Secure the dowel pin from one side with a
little cyano glue, but please take great care to avoid the adhesive
running into the swivel link. The next step is to slip the rotor
hub 57 through the adjustment lever. Insert the second 1.5 Ø
m6 x 20 mm dowel pin 111 to connect the rotor hub to the
adjustment lever, and apply a drop of cyano to secure the
dowel pin as described previously.
Fig. MR-01
The next step is to fit the rotor yoke 62. This part features an
opening at one end, and two integral depressions at the other.
Fit this part on the rotor hub 57 in such a way that the pushrod
56 projects through the opening, and the two depressions are
on the underside. Secure the rotor yoke by pressing the 3 Ø x
28 mm dowel pin into place. Push the dowel pin through to the
point where it lies flush with the opening for the pushrod; the
dowel pin must not project into the opening.
Fig. MR-02
Position the rocker 52 between the rotor hub bearing brackets,
and secure it by inserting the 2 Ø m6 x 16 mm dowel pin 112.
Apply a little cyano to the dowel pin as already described, and
check that the parts move freely.
Fig. MR-03
The blade holders 91 feature moulded-in points which mark
the pitch angle (5°); they must be installed with these points
visible at the top. Secure the blade holders using the two M3 x
20 mm socket-head cap screws 100.
Fig. MR-04
3.2 Rotor head linkage and mixer
Attach the screw-fitting ball-links 14 to the two adjustment
links 13. Screw the ball-links onto the rods until the overall
length is 62 mm, as shown in the illustration.
Fig. MR-05
The two mixer arms 59 are attached to the rocker using the
M2 x 10 mm screws 96; note that the flat face of the mixer
arms must face the rocker. Press the double-bend main rotor
rods 32 into the outer holes, and the mixer arm pushrods 35
into the inner holes, before tightening the M2 screws fully; the
double-bend rods should be inserted in the outer hole in the
rotor yoke on the other side. Fit a 5 Ø x 2 Ø x 0.3 mm washer
104 between the screw-head and the mixer arm on each side.
Fit the angled end of the mixer arm pushrods through the outer
hole in the mixer arms.
Fig. MR-06
3.3 Auxiliary rotor
The two M5 x 35 mm socket-head cap screws 102 act as
centrifugal weights in the auxiliary paddle blades, and should
be screwed into the tips of the auxiliary rotor blades 51. Tighten
one fully, but leave the other one slightly loose, so that the
flybar can be fitted in the next stage.
Fig. MR-07
Place the auxiliary rotor on the rocker, and slide the flybar 40
through the appropriate hole in order to connect the auxiliary
rotor to the rotor head. Use a length of thin wire or similar to
push the flybar through as far as it will go. Now tighten the M5
x 35 screw which you previously left loose. Connect the pushrod
56 to the auxiliary rotor.
Fig. MR-08
3.4 Completing the main rotor shaft
Figs. MR-09 & -10
Push the main rotor shaft 31 into the rotor hub 57 from the
underside, noting that the notch which locates it in the rotor
hub must be at the top. Now look through the hole in the rotor
hub and rotate the shaft to the point where the M3 x 12 mm
screw 99 can be inserted unhindered. Fit a 6 Ø x 3.2 Ø x 0.3
mm washer 105 between the screw-head and the rotor hub.
Secure the screw by fitting the M3 self-locking nut 114.
4 Assembling the tail rotor
4.1 Tail rotor shaft
Fig. TR-01
Press the tail rotor shaft bevel gear 75 onto the tail rotor shaft
28, noting the dimensions stated in the illustration.
4.2 Preparing the tail rotor shaft
Fig. TR-02
Fit the ballrace 116 onto the tail rotor locating piece 84a. Press
the joined parts onto the tail rotor shaft 28.
4.3 Assembling the tail rotor
Fig. TR-03
Place the tail rotor hub 84b and the two 6 Ø x 3 Ø x 0.3 mm
washers 106 between the integral blade holders of the two tail
rotor blades 80. Ensure that the tail rotor blades are fitted the
correct way round: viewed from the left, the tail rotor rotates
clockwise.
Fit the two M3 x 16 mm grubscrews 109 to connect these
parts.
Fig. TR-04
Now assemble the tail rotor and the prepared tail rotor shaft.
Apply a drop of thread-lock fluid to both grubscrews 109.
Fig. TR-05
Check that there is no axial play in any of the parts fitted on
the tail rotor shaft, i.e. there must be no gaps!
Fig. TR-06
The next step is to install the control yoke 83: the ends of the
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