Multiplex Alpina Carbotec, Assembly Instructions Manual

Page: 13 / 36

13
Assembly instructions
night. Although the models have very narrow production tolerances, we
cannot guarantee a 100% smooth fillet from wing to fuselage. Like writ-
ten above, they are easy to rework.
lectrical connection between Wing / Fuselage
For the model Alpina carbotec, 4 wing servos need to be connected by
using green 6pole MPX M6 connectors in the wing root area. The fuse-
lage is already prepared to fit the frame of the M6 connector.
You can get ready-to use cable beams for wing and fuselage. Completely
soldered, isolated and including all needed parts like M6 connector frame,
screws and UNI-connector safety clips. Order no.:
MPX order no. 1-00716
Cable beam Alpina carbotec (complete)
If you order the parts separately, pay attention to quality and only use
original MPX M6 connectors with high quality gold plated con-
nectors!
Every servo wire gets one contact of the connector. So all 6 pins are used
(2x plus, 2x minus and 2x signal).
Tip: Use the connectors as “forced” plug-in mounts. Don’t be afraid of
fixed connectors. Cable breaks are more likely with loose connectors.
Insert the M6 connectors with ready soldered and isolated cables into the
M6 frame. Apply some hot glue on the heat shrink side to secure the
connector in the frame and have a working strain relief for the wires.
Feed the 2 fuselage wires with the same length through the root rib of the
fuselage and mount the M6 connector frame to it. If needed, sand the
opening to about
9x18mm size. Mark the position of the screws and drill
a hole for them with Ø
1,5mm
. Screw the frame into the fuselage root rib
(picture 15) .
Feed the 2 wing wires with different lengths through the root rib of the
wing to the servo mounting hole. You can use a flexible wire to do so. The
cables are a little longer than needed to easily connect the servos later.
Mount the wings to the fuselage and stick together the M6 connectors at
the same time
(picture 16)
. Make sure that the wing can be mounted
completely without leaving a gap between wing and fuselage. If needed,
sand the opening in the wing root to about
9x18mm size. Pull the wings
away from the fuselage a little and apply a small amount of resin to the
connector frame. Push the wings back to the fuselage and let the resin
cure thoroughly. Afterward remove the wings from the fuselage and use
the screws to finally secure the connector with the frame to the wing root
(picture 17) .
Installing the wing lock
Use the MULTIlock-System to secure the wings to the fuselage. This way
the wings can easily be assembled on the field and are fairly secured for
the flights. To release the wing lock and remove the wings from the fuse-
lage, we recommend using the red shim
(picture 18)
.
The grommet of the MULTIlock is ready installed in the fuselage. The
connector pins need to be glued in the wing. Apply some tape on the root
rib of the fuselage and add a little releaxe wax to the area around the wing
lock. Lock the pin of the wing lock to the fuselage
(picture 19) . Assemble
the wing to the fuselage and check if the wing can be fully slid to it without
any interference with the pin. If needed, enlarge the hole in the wing with
a drill
(picture 20) .
Tip: If you need to remove the MULTIlock pin again before gluing, the best
way to do so is by using nippers.
Insert thickened resin in the bore of the wing and also to the pin, which is
engaged in the grommet. Install the wing and fix it with some tape. Let it
cure completely and remove the wing with the red shim like described
above.
Cross struts
To protect the fuselage from damages at hard landings, glue in the cross
struts in the area of the leading edge and the trailing edge
(fibre glass
tube Ø 8 mm)
. Shorten the tubes to the desired length so they fit. The
fuselage should neither be pushed apart by the tubes nor should it be
pressed together. Mount the wings to check the fit of the bars and if
needed adjust the length. The front cross strut should be glued after in-
stalling the electrical connections, to maintain a sufficient accessibility. To
mount the rear cross strut, we recommend gluing it to a wooden strip in
order to place it. Let the resin cure and remove the strip again afterwards
(picture 21/22) .
Servo tray
Fit the servo tray to the fuselage and rework the servo cut out if needed.
Attention: The servo tray fits! Don’t sand it too much. You can insert it by
twisting it a little. Test mount the servos and slide the tray to a position
where there is no tension to it.
Fix the tray by using just a few drops of resin and remove the servos
again. Afterwards prepare the gluing area by sanding the fuselage side
with 80 grid sandpaper. The tray gets fixed finally by applying a glue bead
using thickened laminate resin. You get best results by also laminating a
strip of 100g/m² glass cloth onto the glue bead so there is a very strong
connection between servo tray and fuselage side wall. After everything is
finished, install the servos again.
Fuselage servos / Linkages
The eyebolt for the rudder should have a length of about 5mm . Before
gluing it to the rudder, make sure that it moves freely without touching the
outlet cover of the linkage
(picture 23)
.
EN