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The front end of the guide tube must not be supported against the tail boom, but should be left
„floating" freely on the wire pushrod; for this reason it must be left as long as possible, i.e. it
should extend forward as close to the servo as possible.
At the front end the standard method of connecting the wire pushrod to the tail rotor servo is to
solder a threaded coupler to the end, and screw a clevis on the coupler. Remember to cut the
pushrod to the correct length before soldering the threaded coupler to the wire: when the
collective pitch stick is at centre, the output arm of the tail rotor servo should point straight down,
and the tail rotor bellcrank should be exactly at right-angles to the tail boom.
Alternatively you can simply form a Z-bend in the front end of the wire pushrod using Z-bend
pliers (Order No. 5732). The advantage of this method is that the guide tube can be extended
very close to the servo, providing maximum support for the pushrod, whereas it would have to
be shortened further if a clevis and threaded coupler were used. The drawback is that you
would have to determine the position of the Z-bend with great accuracy, because there is no
means of adjusting the pushrod length with this arrangement. This solution is therefore only
recommended to the experienced modeller.
11. Cabin
(bag SR-6)
11.1 Installing the front cabin supports
Install the two front canopy stand-off pillars in the clips at the front of the sub-structure, securing
each with an M3 x 12 socket-head cap screw fitted from the rear.
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