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Construction Manual
we recommend these CA hinges to be installed.
Starting with the horizontal stab, mark the locations of each of the
hinges. Now using a sharp hobby knife, carefully cut a hinge-sized
slot in each of the four locations, making sure the slots are cut
perfectly in the center of the stab’s trailing edge.
Now slide the elevator in place (through the slot you cut earlier)
and mark the leading edge of the elevator for hinge location.
Remove the elevator, then make the matching slots in the elevator.
Take 4 of the hinges and stick a t-pin into them
as shown here, right in the center. These pins
will help in installing the pins half-way into the
stab and elevator.
Slide each of the 4 hinges into the elevator
slots, then slide the elevator into position
on the back of the horizontal stab. Continue
working the hinges in to the horizontal stab until they are fully
seated up against the t-pins.
When happy with the fit, remove the elevator and the hinges, then
set them aside.
Now using this same technique, cut the hinge slots for the both
ailerons and the rudder. Test-fit all of them to make sure the slots
are the proper depth and the hinges can be properly inserted.
Step 78 - Covering (horizontal stab and elevator)
We advise covering your model in two steps. First is to cover the
horizontal stab and elevator, then stopping there. After you’ve
covered both parts, then the elevator needs to be permanently
installed using the CA hinges. Push the elevator into place, then
when properly seated, remove the t-pins from each of the hinges.
Place a couple drops of thin CA on each hinge and allow it to wick
into the hinge material and cure. It takes just a few drops so don’t
overdo it. Continuously work the elevator back and forth to make
sure any excess glue doesn’t accidentally glue the elevator right to
the stab in a fixed position.
Step 79 - Fuselage Assembly (fill elevator slot)
We mentioned this earlier, but after the elevator is properly
installed, now use a bit of scrap wood to fill in the slot that was cut
into the rear of the fuselage. Once the glue has cured, sand this
area smooth before continuing.
Step 80 - Covering (remainder of airframe)
Now it’s time to cover the rest of the Mambo. Double check that
all surfaces are smooth and ready to cover. Sand as necessary,
then cover the rest of the airframe with the covering/finish of your
choice.
Note that if you’re powering with an
electric motor, you’ll need to make a
hole for the cooling air to escape the
rear of the fuselage. We choose to cut
a hole just forward of the stab, on the
underside of the fuselage.
Logos, numbers, etc.
If you want to use graphics similar to the ones we used, Old School
Model Works has teamed up with Callie Graphics as a supplier
for pre-cut vinyl. They are a very well known provider of custom
graphics for R/C models.
We have supplied them with the artwork needed to cut the correct
size logos. You can order straight from them, choosing the colors
that work for you.
Contact Callie Graphics at this link: https://
callie-graphics.com or scan the QR code on
the previous page.
Note that Callie Graphics is not affiliated
with Old School Model Works, nor does
Old School Model Works generate any
income from this partnership.
The next steps shown are not in a particular order
but will all need to be done, unless marked optional.
Step 81 - Optional canopy
Included in the Mambo kit is a canopy and several small pieces
to make up internal framework. This is optional and you’re free to
change things up if you’d like, but the following steps will describe
how to assemble these pieces as shown on our prototypes.
• Locate all the pieces from BP9, and C3 from
BP5.
• C3 is glued to C1, but be sure to use CJ as
a jig to get the angle correct. Don’t glue CJ
to these pieces - just use it to get the right
angle.
• Next, C5 is glued to C2, with C5’s
tabs fitting into the pre-cut C2 slots.
Then glue C4 in place as shown.
• When these two sub assemblies
are completed, lightly sand the top
edge of C1 and C2 to bevel them.
This will allow the canopy to fit
better in the next few steps.
• Temporarily tape these two pieces in place on the airframe. The
C1/C3 assembly is positioned at the rear of the wing, right in
the center, and the C2/C4/C5 assembly is positioned on the
fuselage sheeting, just in back of the C1 C3 assembly.
• Now take the canopy and trim along it’s flat edge. You’ll want
to trim away the excess plastic and leave a smooth lip, roughly
3/16” wide around the it’s perimeter.
• Test the canopy in place and
see if will rest flat on the wing
and fuselage sheeting. If not,
remove it and lightly sand the
interfering area on the canopy
assemblies. Not all canopies
are exactly identical, so a bit of
trial and error is needed to get a
good fit. Try not to sand/bevel
too much wood away - just take a little at a time.
• When happy with the fit of the
canopy, it’s time to mark where it will
split. Make several marks around
the canopy at the gap between the
two canopy assemblies. We used a
Sharpee for this as the marks can
easily be removed with a touch of
denatured alcohol.
