Pober Pixie
Pober Pixie building instructions
7
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Screw the centre section to the cabane, align it carefully and drill the rear holes 3 mm Ø.
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Glue M3 captive nuts in the rear holes in the cabane, and screw the centre section to the cabane
while the epoxy is still soft - this pulls the nuts into place and secures them. Fit the screws with
integral washers from the underside. Access to these screws is a little awkward, but they only
have to be fitted once. Once the model has been assembled, the wing centre section stays
attached to the cabane permanently.
Note:
be sure to glue the captive nuts in place securely, using plenty of epoxy.
•
Allow the glue to set hard, then remove the wing centre section and prepare it for covering.
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Prepare the hatch over the centre section access opening by rounding off the corners etc.
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The front of the hatch is secured using two woodscrews. Glue an obechi reinforcement in place at
the screw position (cut the wood to the required length - the rest of the material is used for the
cowl reinforcements).
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The rear part of the hatch is retained using the profiled strip supplied - cut it to length and glue it
in place as shown in the drawing.
Covering the wings
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Sand the balsa surfaces and remove all sanding dust; the panels are now ready for covering.
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Cover the wing panels using Oracover or tissue, following the instructions and recommendations
provided by the manufacturer.
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The wing structure is adequately rigid and no special measures are required to prevent wing
warps, provided that you use standard covering materials such as Oracover, Solarfilm or Model-
span tissue.
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Using the covering film as aileron hinges is perfectly adequate. The fuselage can be painted
directly using most types of colour paint.
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If you are installing a glow motor it is essential to apply a coat of fuel-proof lacquer to protect the
whole model from the effects of fuel. We recommend aero-naut polycarbonate spray paint for
this, as it is highly resistant to methanol, nitro-methane, and fuels containing these substances.
Cowl
The cowl is a vacuum-moulded ABS item, and is fixed to the fuselage using four woodscrews with
integral washers.
•
Cut out the cowl along the marked lines and carefully trim it to final size - you will find the material
easy to sand.
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Install the motor bracket, motor mount and propeller driver (recommended spinner diameter 42
mm - aero-naut Order No. 7252/15), and cut a central hole in the front of the cowl for the propeller
shaft.
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Place the cowl on the fuselage and drill 2 mm Ø holes through both parts in the positions shown
in the drawing.
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Cut hardwood reinforcements from the tapered obechi strip supplied and glue them on the inside
of the fuselage at the cowl screw positions.
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Prepare the battery supports as shown in the drawing (electric version) and glue them in the
fuselage. Cut holes in the front face of the cowl to provide an adequate flow of cooling air to the
power system.
Installing the motor
Electric version
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Glue together the side and front motor mount parts - see drawing (DET. 14).
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Check that all parts are square. Use the balsa spacer block supplied when gluing the inner
spacer piece in place.
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If you are installing a high-performance motor we recommend that you glue an extra piece of
plywood over the top, as this considerably increases the torsional rigidity of the assembly.
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Allow the glue to set hard, then attach the motor mount assembly to the front face of the fuselage
(see drawing for exact position) and mark the position of the slots for the motor mount side
pieces. Important: the motor mount must be fitted centrally relative to the cowl opening.
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This is the procedure: mark a line on the front face of the fuselage at the position stated in the
drawing - lay a straight edge in position and draw a vertical line using a soft pencil or felt-tip pen.
