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You will find a three-pole micro-switch on the left-hand side of the mechanism: solder
a servo extension lead to the contacts as shown in the photo.
The purpose of this micro-switch is to "arm" the speed controller once the motor
pylon has been extended.
There are two methods of installing the retractable motor system: it can be attached
directly to the wing joiner sleeve, or mounted on separate formers in the fuselage.
The simplest solution is to fix it to the sleeve for the wing joiner rod.
If you opt for separate formers, you will need to cut the two wooden supports from 6
mm beech plywood to suit your glider's fuselage, and trim them carefully to fit at the
appropriate point. These formers should then be glued horizontally to both sides of
the fuselage, as shown in the photo.
It is absolutely essential to position the formers in such a way that the motor axis lies
parallel to the fuselage centreline when the motor pylon is extended. This point is
important, since the model's flying characteristics depend upon it. The retractable
motor unit is then screwed to the formers, using the two aluminium brackets and the
appropriate brass tube. Check that the system is completely enclosed inside the
fuselage in the retracted state, and is aligned exactly in the centre of the fuselage,
otherwise the mechanism could foul or be obstructed by the edges of the fuselage
opening. Note that the aluminium brackets should rest against both sides of the
mechanism. Clamp the brass tube in the mechanism by tightening the two socket-
head cap screws.
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Änderungen vorbehalten! Keine Haftung für Druckfehler
12/2009
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