Assembling The Skid Landing Gear; Installing The Silencer; Tail Rotor Control System - GRAUPNER heim Starlet 50 Mode D'emploi

Starlet 50

8. Assembling the skid landing gear

(bag SR-4)
Push the skid tubes 4447.7 through the skid bars 4447.6, and set the bars 207 mm apart
(distance between retaining screws) by adjusting the position of the bars on the tubes.
The skid landing gear can now be fixed to the mechanics using two M3 x 16 socket-head cap
screws at the rear and two M3 x 20 socket-head cap screws at the front; note that the spacer
sleeves 4451.5 must be fitted at the front. Position the skid tubes so that they project beyond
the rear skid bars by about 50 mm on both sides at the rear. Check that the skid tubes are
parallel to each other. Working from the inside, drill 1.5 mm Ø pilot-holes through the skid bars
and skids, and fit 2.2 x 6.5 mm self-tapping screws to fix the parts together. Apply a little two-
pack adhesive to the end-plugs and press them into the skid tubes.

9. Installing the silencer

If you are using an expansion silencer, such as Order No. 1809.33 or 1871.72, install a
pressure nipple in the expansion chamber and attach the silencer to the motor using the screws
supplied with the unit. Don't use a gasket at the exhaust joint; it is better to apply a thin coating
of thread-lock fluid to the contact surfaces.
If you are using a tuned pipe silencer, for example Order No. 1783A, the first step is to screw
the exhaust manifold 2259 to the motor, and pass it through the circular opening in the
mechanics sub-structure; here again, a thin coating of thread-lock fluid is better than an exhaust
gasket. Install a pressure nipple on the tuned pipe, then route the pipe through the rear
bulkhead 4450.18, working from the rear, and connect it to the exhaust manifold with Teflon
hose and spring clips; there should be a gap of about 5 mm between the manifold and the inlet
stub of the tuned pipe. At an earlier stage you should have fitted the additional tail boom flange
1292.6, and this includes the tuned pipe support. Adjust the position of the support and rotate it
so that the tail pipe of the tuned pipe silencer can be clamped in the holder by tightening the M3
x 16 socket-head cap screw. Fit a piece of silicone exhaust hose on the tail pipe before you do
this.
Regardless of the type of silencer you are using, the pressure nipple on the silencer should be
connected to the vent nipple which is mounted in the top of the fuel tank, using a length of
silicone fuel tubing.

10. Tail rotor control system

(bag SR-5)
The first step in connecting the tail rotor pushrod 4451.3 is to undo the screw in the tail rotor
bellcrank 4618.60, and fit the straight end of the pushrod through the guide holes in the tail rotor
gearbox flange and the horizontal stabiliser mount, working from the tail end. If the pushrod is a
slightly tight fit in the tail rotor gearbox flange, open up the hole in the flange using a 2 - 2.5 mm
Ø twist drill. Connect the pre-formed end of the pushrod to the outermost hole in the bellcrank,
then fit the crank again and tighten the retaining screw.
Slide two rubber grommets onto the CFRP guide tube at the rear end to a distance of about 20
mm, and space them about 3 mm apart. Slip the guide tube onto the pushrod from the front, and
position it so that it rests on the tail boom brace flange 1292.6 at the rear. Fix it in this position
by wrapping a cable tie round the tail boom between the rubber grommets.
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