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Fig. 4
- Screw the bottom end of the brace to the skid bar, and the
top end to the clip on the tail boom.
Fig. 5
- Attach the horizontal stabiliser to the tail boom using the
clip and screws provided. Ensure that the stabiliser is
exactly at right-angles to the main rotor shaft.
Fig. 6
- Undo the front screws and remove the servo frame "S".
Fig. "L", Measuring the pushrod lengths "X".
Fig. 7
- Prepare the pitch-axis servo (N) and the roll-axis servo (R)
as follows: set the servos to neutral from the transmitter,
cut down the output arms as shown, and fit them on the
servo output shafts in the position shown.
- Use rubber grommets and metal spacers when installing
the servos.
- Connect the pushrods (Y-02, pitch-axis, length: 59 mm)
and (Y-03, roll-axis, length: 49 mm).
- Place the servos in the servo frame and secure them with
the screws and nuts provided.
Fig. 8
- Install the servo frame again.
- Press the pushrods onto the ball-end bolts on the rocker
and the bellcrank. Fix the four cabin supports to the
chassis; secure the screws with Loctite.
Fig. 9
- Set the collective pitch servo (P) to neutral from the trans-
mitter, cut down the output arm as shown and attach it to
the servo output shaft.
Assembly instructions
Crown III
- Connect the collective pitch pushrod (Y-06, length: 15
mm).
Fig. 10
- Install the servo and secure it with the screws and nuts
supplied. Connect the collective pitch pushrod.
- The collective pitch actuator Y-01 is adjusted as part of the
radio control system set-up procedure.
Fig. 11
- Undo the rear screws in the chassis (arrow) in order to
install the gyro support.
- Fit the gyro support and re-tighten the screws.
Fig. 12
- Set the tail rotor servo (H) to neutral from the transmitter,
cut down the servo output lever as shown, and mount it on
the servo output shaft.
- Open up the hole in the servo output arm to 1.5 mm Ø,
screw the linkage ball to the output arm and secure it with
a nut, not forgetting the Loctite.
- Place the servo in the frame and fit the retaining screws.
Fig. 13
- Attach the tail rotor servo assembly to the tail boom using
the clips provided. Tighten the screws just to the point
where the assembly cannot shift.
Fig. 14
- Route the tail rotor pushrod Y-08 through the guide in the
horizontal stabiliser clip.
- Connect the pushrod to the linkage ball on the servo out-
put arm and the bellcrank.
- Adjust the position of the servo assembly so that the
bellcrank is at right-angles to the tail boom.
- Tighten the screws in the clips in this position.
4
Fig. 15
- Attach the gyro to the gyro support using double-sided
foam tape.
Fig. 16
- Attach the speed controller to the chassis using a cable
tie.
Fig. 17
- Install the flight battery and secure it. Don't connect it to
the speed controller at this stage.
Figs. 18 and 19
- Connect the servos, the gyro and the speed controller to
the receiver.
- Fix the receiver in place.
- Locate the flexible wire aerial attached to the receiver,
route it through the holes in the skid bars and finally to the
vertical stabiliser.
Figs. 20 and 21
- Connect all the pushrods to the main rotor head after
checking that they are set to the stated lengths.
Pushrods: see also Replacement Parts list, "Stage 12".
- Linkage points and pushrod lengths at the main rotor
head:
- Y-04, swashplate - flybar frame, length: 42 mm
- Y-05, collective pitch compensator - mixer lever, length: 25
mm
- Y-07, mixer lever - blade holder, length: 14.5 mm
- Y-09, Bellcrank (roll-axis) - swashplate, length: 22 mm
Order No.
S 2610
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