aero-naut Joker RC Istruzioni per la costruzione - Pagina 5
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Tailplane
The tailplane is fixed to the fuselage
using two nylon screws. This means
that it can be removed for ease of
transport, and the screws can shear
off in a hard landing.
The first step is to open up the marked
holes in the tailplane saddle on the fin
using a 3.5 mm Ø drill bit.
Now glue the captive nuts in the
plywood support plate, and epoxy the
whole assembly inside the fin; check
that the nuts line up exactly with the holes.
The holes in the tailplane can now also be opened up to 3.5 mm Ø; screw the tailplane to the
saddle.
Glue the horn in the underside of the elevator as the basis for the elevator linkage; it should be
positioned immediately aft of the open trailing edge of the fin.
Now fit the control 'snake', complete with steel
pushrod, into the fuselage from the tail end. Slide
it fully forward; it should end up immediately
adjacent to the elevator servo position.
Withdraw the steel pushrod from the snake outer
by a few centimetres, and solder the threaded
coupler to the tail end. Screw the clevis half-way
onto the coupler, and connect it to the elevator
horn.
Fix the snake outer inside the fin with a few drops
of five-minute epoxy. Check that the pushrod runs
in a smooth curve to the horn, without being
under tension.
Rudder
The fin can now be sealed with the balsa tail post;
use epoxy for this joint, and roughen the inside of
the fuselage thoroughly at the joint position.
The rudder is attached by means of two plastic
hinges, which should be glued in place using
cellulose adhesive or epoxy. Apply a tiny drop of
oil to the hinge pivots beforehand to ensure that
they are not jammed by excess glue.
Open up the exit slot in the side of the GRP
fuselage at the marked point. Slip the control
'snake' through the slot, complete with wire
pushrod, and glue the sleeve to the slot using a
few drops of cyano-acrylate.
The horn can now be glued in the rudder: ensure
that it lines up accurately with the pushrod.
Solder a threaded coupler on the end, and screw
the clevis half-way onto it. You can now connect
the rudder linkage at the tail end.
Joker building instructions
Joker
5