Page 14
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Construction Manual
you also sheet the area on the top of the fuselage, between the
front sides, as shown here. This not only adds to the looks of the
Javelin, but gives much needed support to the sides so they can
handle vibration and airflow much better. If using glow lower, you
will need to make cutouts for the needle valve and muffler screws.
Now it’s time to think about radio and engine installation.
These next steps of covering, hinging, radio and power installation
are not in any particular order. Some modelers like to cover
everything first, then outfit the rest. Others like to hinge and
pre-install the components, working out the installation before
covering. Use the method that works best for you.
We prefer to pre-install many of the components to make sure
there are no surprises in the way things fit or might have to be
modified for after market items. We find it much easier to fix these
problems now, before covering, as there’s nothing worse than
ruining a good covering job by having to hack a hole or provide
clearance for something.
Aileron servo hatches (from LP2)
From leftover 3/16” x 3/8” x 36”
basswood strip, cut eight 3/4”
pieces. Make a mounting post by
laminating two pieces, gluing the
3/8” sides together to make a 3/8 x 3/8” square post. Make 3
additional posts from the remaining pieces, sanding the ends flat.
Position your aileron servo on the inside of the aileron hatch so the
servo arm output shaft is centered in the opening.
On the inside of each aileron hatch, glue one post on each side of
the servo as shown in the photo.
Note that the left hatch is a mirror image of the right hatch.
Now fit the servo hatches into position on the bottom of the wing.
Using the pre-cut holes as a guide, drill four 1/16” mounting
holes into the 3/16” x 3/8” basswood mounting strips installed
earlier. Harden the wood with a bit of thin CA and you can use the
supplied 2-56 x 3/4” self tapping screws to secure the hatches in
place.
Aileron wire holes for servo wires
On the plans you’ll see callouts where
the two holes are pre-cut in the bottom
sheeting (S3). These holes allow the
aileron servo wires to pass through
the wing and into the fuselage.
This is optional, but could make the aileron servo installation a bit
easier, once the wings are covered. Cut two 18” lengths of string,
one for the port side, and one for starboard. Starting with the
port wing panel, push the thread
through this hole, then through
the circular holes in R3, R4, R5
and R6. The string will now extend
from the servo bay, out through
the bottom of the wing. Tape both
ends of the string so they won’t
easily pull out. Do the same for
the starboard side.
Pushrods (rudder & elevator)
In F5, F6, F7 and F8 we’ve made provisions to help you run
flexible pushrods back through the
fuselage. You’ll see a pair of pre-
cut holes where you can snake the
outside of the flexible tubing system
of your choice, then continue out
through the exit holes pre-cut in the
sides of the fuselage.
The support for F6 is a separate
piece - F6A which is in BP7.
If you choose to use this type of
pushrod, make sure you glue this
outer sleeve to each of these center
supports. If you choose a different
system, these supports can be cut
away as needed for clearance.
Make sure that when installing the
control horns, they are placed in-line with the pushrods, and that
the line of holes where the clevises attach are positioned over the
hinge line.
For the average pilot, we recommend that clevises are attached to
the outermost hole on each control horn.
Servo mounting (rudder & elevator)
The rudder and elevator servo
should be mounted in the two
rectangular holes pre-cut in the back
of T2.
Locate four T5s from LP3, LP4 and
LP6. These are glued in place as
shown to double-up and strengthen
T2, where the mounting screws will
be threaded in.
Servo mounting (throttle - glow engines)
If you are powering your Javelin with a glow engine, then you’ll
also need to mount a throttle servo. There are two positions to
mount the servo - one on each side of the front of T2. For most
installations, the throttle servo will mount on the starboard side.
Regardless of the side you choose, glue on a couple more of the
T5 pieces to double-up T2 for the servo screws.
Radio installation
Finish the installation of your radio gear by adding the receiver,
flight pack battery and the switch. We mounted the receiver to TF2
using a bit of self-adhesive hook-and-loop (not included).
If you’re using a flight pack battery, there is no set place to install
it. It’s location should be dictated more by the C.G. than anything
else.
Also any switches (whether radio or arming for the electric power
system) can be mounted in the tank/battery compartment. The
magnetic hatch is quickly released to get to them.
Power system
Installing your power system of choice is up next. We’ll show
photos for regarding electric and glow installations. Note that
these are suggestions only as your power system might vary from
what’s shown here.
H1/H1 (below)
1/8” Lite Ply
H1/H1 (below)
1/8” Lite Ply
S2 (top)
S3 (bottom)
1/16” Balsa sheet
S2 (top)
S3 (bottom)
1/16” Balsa sheet
