Multiplex Heron KIT Instrucciones De Montaje página 17

Important note
This model is not made of Styrofoam™, and it is not possible to glue the material using white glue, polyurethane or
epoxy; these adhesives only produce superficial joints, and simply break away under stress. Please be sure to use
medium-viscosity cyano-acrylate glue exclusively, preferably Zacki ELAPOR® # 59 2727, which is optimised specifically
for ELAPOR® particle foam. If you se Zacki ELAPOR® there is usually no need for cyano 'kicker' or activator. However,
if you wish to use a different adhesive which requires the use of activator, please note that these materials are injurious
to health, and should always be applied in the open air. Take care when handling all cyano-acrylate adhesives, as they
harden in seconds, so don't get them on your fingers or other parts of the body. We strongly recommend the use of
goggles to protect your eyes. Keep the adhesive out of the reach of children! For certain joints it is also possible to use
hot-melt adhesive; the instructions indicate where this is the case.
Working with Zacki ELAPOR®
Zacki ELAPOR® has been developed specifically for glued joints in our models which consist of moulded ELAPOR®
foam parts.
Please observe the following points in order to obtain perfect joints:
• Avoid the use of activator. 'Kicker' significantly weakens the joint. We advise leaving joined parts for 24 hours to obtain
maximum strength, particularly when the glued area is large.
• Activator should only be used for temporary, small-area joints ('tacking'). Spray a little activator on one surface, and
allow it to air-dry for about thirty seconds.
• To obtain maximum joint strength you should lightly sand the surface with 320-grit abrasive paper before applying glue.
Bent parts - actually don't exist. If you find that a component has taken up a curve, perhaps after being trans-
ported, it is easy to straighten again. In this respect ELAPOR® behaves in a similar way to metal: bend the
component back slightly beyond the correct position, and the material will then spring back to its proper shape
when released, and maintain it. There are limits, however - don't overdo it!
Bent parts - really do exist. If you wish to paint your model, apply MPX Primer # 60 2700 to the surfaces, wiping it on
very lightly as if you were cleaning the model. Paint must always be applied thinly and evenly, otherwise the component
will warp. Then you really will have bent parts, and they will also be heavy and perhaps even unusable. We have found
that matt-finish paints produce the best visual effect.
Specification:
Wingspan
Overall length
All-up weight, glider
All-up weight, electric
Wing area
(FAI => wing + tailplane, excl. fuselage)
Wing loading
RC functions:
Elevator, rudder, ailerons, flaps => (Butterfly),
motor speed,
optional tow release
The Centre of Gravity is located at a point 65 mm aft of
the wing root leading edge (measured at the fuselage).
Note:
Please separate the pictorial pages from the centre of the
building instructions before you start construction.
1. Before starting construction
Please check the contents of your kit.
You will find Figs. 1, 2 and the Parts List helpful here.
2. Cutting the GRP longerons to length
Use a pair of side-cutters to cut the 2 mm Ø x 800 mm GRP
rods 69 to the stated lengths to form the fuselage longerons:
1 x 243 mm / 1 x 282 mm / 1 x 218 mm / 2 x 326 mm.
Cut the 1.3 mm Ø x 650 mm GRP rods 68 to the following
lengths to form the stiffeners for the tailplane and fin:
2 x 215 mm and 2 x 400 mm
Fig. 3
2400 mm
1100 mm
min. 1350 g
min. 1550 g
approx. 41,3 dm² (FAI)
min. 32,7 / 37,5 g/dm²
3. Gluing the fuselage longerons in place
When you have cut the fuselage longerons 69 to length,
they can be glued in the fuselage shells 3 and 4: the 326
mm longerons are fitted to the sides at the front, while the
218 mm longeron is installed at front bottom in the right-
hand fuselage shell 4.
The 243 mm longeron should be glued in the turtle deck
of the right-hand fuselage shell. The underside aft of the
undercarriage is reinforced with the 282 mm longeron.
This is the procedure: first allow a little Zacki ELAPOR®
to run into the channel, then press the longeron into place.
Finally run Zacki ELAPOR® super liquid along the length
of the channel.
Fig. 4
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