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Install the motor from underneath. The starter shaft must
engage in the clamping roller freewheel which is an integral
part of the clutch.
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Fix the motor mount to the frame on both sides using the
retainers (washers) and screws.
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Align the motor carefully, then tighten the screws.
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Install the hexagon starter driver. Check that the starter
shaft rotates freely.
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Connect the motor to the fueltank using fuel tubing. We
recommend using a fuel filter, e.g. No. 6009.
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Install the silencer and gasket, using the screws, three
circlips and nuts.
Stage 2: Installing the tail boom and toothed belt
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Before installing the tail boom loosen the pre-fitted screws
in the chassis, as this makes it easier to slide the boom into
position.
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When fitting the tail rotor drive belt note the direction of
rotation as shown in sketch „B".
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Set the correct belt tension by carefully pulling the tail boom
back as shown in sketch „A". Caution: don't over-tighten
the belt - light pressure should push it in slightly.
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Tighten the four retaining screws.
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The two grubscrews which secure the tail boom should not
be tightened until the vertical stabiliser has been fitted and
aligned (Stage 3).
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Caution: ensure that the tail boom is not pushed out of
shape when you tighten the screws.
Stage 3: stabiliser panels, tail boom braces and tail rotor
pushrod
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Fix the vertical stabiliser to the tail rotor gearbox using two
M3 x 10 socket-head cap screws.
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Attach the tail boom braces to the chassis using two M3 x
10 socket-head cap screws. Align the horizontal stabiliser
mount and tighten the screws before fitting the horizontal
stabiliser.
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Align the tail boom with the help of the vertical stabiliser,
and tighten the grubscrews in the chassis.
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Note: in the interests of clarity the servos are shown
already installed.
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Attach a ball-link to one end of the tail rotor pushrod.
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Position the pushrod guides and spherical bushes on the
tail boom following the dimensions stated in the drawing.
Caution: note the positions „A", „B" and „C" of the balls as
shown in the drawing.
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The spherical bushes must be free to swivel when the
pushrod guides have been installed and the screws
tightened.
Ornith 46
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Stage 4: installing the servos
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Stage 5: installing the pushrods
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Stage 6: installing the receiving system
Note:
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5
Thread the tail rotor pushrod through the guides from the
tail end, and connect the ball-link to the tail rotor actuating
lever.
Check that the pushrod runs in a straight line and moves
smoothly; if necessary rotate the pushrod guides until this is
the case.
Fix the horizontal stabiliser to its mount using two M3 x 10
socket-head cap screws.
Press the rubber grommets and metal spacers into the
servo mounting lugs. Caution: the spacer sleeves must be
fitted with the flange at the bottom, so that they rest on the
chassis itself.
Install the servos and fix them to the chassis using 2.6 Ø x
12 mm self-tapping screws and washers.
Attach the flanged linkage balls to the servo output arms as
shown in the drawings, using M2 x 8 countersunk screws
and hexagon nuts. Secure the nuts with Loctite, No. 5074.
Fit the output arms on the servos.
Connect the pre-assembled pushrods to the linkage balls
as shown.
Note: the motor's throttle arm is shown at the centre
position.
The location of the receiving system components (battery,
receiver and gyro) shown in the drawing is only a
suggested installation. You may prefer a different
arrangement to suit your radio control system.
Fix the receiver, gyro electronics and battery in place using
foam, double-sided tape or soft foam rubber to reduce the
effects of vibration.
Suitable methods of mounting include:
Double-sided foam tape, No. 5014, foam rubber hose, No.
S3086, or damping mat, No. S3087 plus rubber bands.
The gyro element must be mounted with vibration-
absorbing material, but must be firmly located relative to the
mechanics.
A good solution is to use double-sided foam tape, No.
5014, or the double-sided tape supplied with the gyro.
Ensure when deploying all the leads that they do not chafe
on or foul the mechanics.
It is important that none of the plug and socket connections
should be under constant tension.
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