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bring the teeth of the tail rotor drive bevel gear into engagement
with the main bevel gear.
Fig. AS-07
The tail boom is prevented from shifting in the axial direction
by the M2 x 6 screw 95, which should be fitted from the right-
hand side as shown.
Fig. AS-08
Secure the tail boom clamp 71 using four M2.5 x 16 screws
98 and one M2.5 x 12 screw 97. Tighten the screws to clamp
the tail boom in position.
The meshing clearance between the main bevel gear and the
tail rotor drive bevel gear can be adjusted by altering the vertical
position of the main bevel gear. It is very important that the
gears rotate smoothly.
Tip: to set the correct meshing clearance, draw a strip of blotting
paper between the teeth of the bevel gears. Press the gears
together, tighten the grubscrews in the main bevel gear, then
wind the paper out again by turning the gears manually. Use
thread-lock fluid to secure these grubscrews.
Fig. AS-09
6.4 Attaching the tail rotor
Slide the front tail rotor bracket 66 and the rear tail rotor bracket
65 onto the tail boom with the small holes facing down.
Insert the rear end of the prepared tail boom in the tail rotor
housing. The hole in the boom (located 20.5 mm from the end
of the tube) must line up accurately with the corresponding
hole in the tail rotor housing. Fit the M2 x 10 screw 96 to
clamp the tail rotor housing to the tail boom. Finally fit the M2
x 6 screw 95 to ensure that the boom cannot shift in the axial
direction.
Fig. AS-10
The tail rotor linkage is completed by installing the tail rotor
pushrod 33 in order to connect the bellcrank to the tail rotor
servo. Slip the pushrod through the two tail rotor brackets from
the rear. Finally slip the pushrod through the articulated barrel
fitted to the tail rotor servo output lever, but don't tighten the
clamping screw in the barrel at this stage. The pre-formed end
of the pushrod should first be connected to the bellcrank from
above. Position the tail rotor in its neutral position, then adjust
the tail rotor servo in such a way that the servo output lever is
inclined 10° to the left when the servo is at neutral, when you
view the helicopter from the left-hand side. Now apply thread-
lock fluid to the grubscrew in the articulated barrel, and tighten
it firmly.
Fig. AS-11
7 Main rotor blades
Attach the main rotor blades 50 to the blade holders using the
four M3 x 16 mm grubscrews 109.
Fig. AS-12
8 Fuselage assembly
Glue together the front fuselage shells 41L and 41R, at the
same time gluing the canopy latch 90 in the appropriate
recesses. The glazing panels (86, 87, 88, 89) can also be
glued to the fuselage nose at the same time.
Fig. AS-13
Glue the fuselage locating pieces 43L and 43R to the inside of
the rear fuselage shells 42L and 42R. Glue the horizontal
stabiliser panels 44L and 44R in place.
Fig. AS-14
You will find a moulded-in brace below the opening for the tail
rotor housing in the left-hand fuselage shell; this can now be
removed using a sharp balsa knife.
Fig. AS-15
The vertical stabiliser shells 45L and 45R are glued to the tail
rotor housing only; they should not be attached to the rear
fuselage itself.
Fig. AS-16
Press the rear fuselage shells against the tail supports on the
tail boom.
Fig. AS-17
Slide the joined front fuselage section onto the integral chassis
rails. To remove the front fuselage section again, press the
canopy latch on the underside, then withdraw it forward.
Fig. AS-18
9 Centre of Gravity
For comfortable hovering the Centre of Gravity should be located
on the axis of the main rotor shaft, whereas a slightly nose-
heavy balance point is recommended if you wish to fly circuits.
The CG position can be adjusted by re-positioning the flight
battery.
Fig. CG (see Quick Start)
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