Page 14
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Construction Manual
Step 112 - Hinge the rudder
Make the necessary slots/holes needed to hinge the rudder to the
stab. We recommend 3 hinges as shown on the plans.
Step 113 - Cut and hinge the ailerons
Measure and cut the correct length and shape for each 1/4” x 1”
strips to make the ailerons. Although not necessary, you can sand
them to a tapered shape if you prefer.
If building a 3ch. model, glue these to the trailing edge to simulate
the shape of the wing. If you are using ailerons (4ch.) round the
leading edge of both ailerons, just as you did the elevator and
rudder. When finished shaping, make the necessary slots/holes
needed to hinge the ailerons to each side of the wing. We
recommend 3 hinges per aileron.
Step 114 - Optional cabin floor.
Using a bit of the leftover 1/16”
sheet, measure and cut to make a
floor between the fuselage sides.
The pieces would rest on the
bottom longerons and span the
distance between LG1 and LG4.
This should be cut so the grain
is crossway (running from the left
to right sides). Check the fit and
when satisfied, glue it into place.
This completes the airframe assembly of the Robinhood 25.
Step 115 - Main gear assembly (prep)
It’s time to assemble the main
landing gear. You’ll find the front
and rear pieces included in the kit.
Place the included nylon landing
gear straps in position - 2 for the
front, 2 for the rear. These straps
are mounted to LG3 and LG6.
Position the gear strut wires so
they are centered on each piece,
then mark and drill 1/16” holes where the straps should mount,
then attach them using the supplied 2-56x3/4” self tapping screws.
Step 116 - Main Gear Assembly (soldering)
With the gear pieces mounted,
rotate the front wire so it is
perpendicular to the fuselage.
Then rotate the back wire so it
meets the front wire as shown
here. Both pieces of wire need
to be lightly sanded and cleaned
where the wires touch, both on
the left and right side.
After cleaning, carefully
and tightly wrap this
joint with wire as shown
here using. We used 26
gauge wire, but other
thicknesses can be used.
Starting on one side,
lightly brush on a bit of
flux over the entire wire-wrap, then use a small torch (or a soldering
iron) to securely older the wire wrap in position, securing the front
and rear landing gear wires into a solid, one piece unit.
When finished, do the same to the other side of the gear and you
should have something like this when finished.
Step 117 - Tailwheel mounting
Mount your choice of tailwheel to the bottom of the fuselage. It
should mount to the bottom of the plywood TW assembly, already
installed.
Step 118 - Aileron servo hatches
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
similar posts from the remaining
pieces, sanding the ends flat.
Position the aileron servo on
the bottom of the aileron servo
cover so the servo arm output
shaft is centered in the opening.
On the bottom 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 attach
the supplied 2-56 x 3/4” self tapping screws to secure them in
place.
Step 119 - Radio and Pushrod Installation
Although you can install the radio
after covering your model, we
find it easier to get everything
in place before covering. This
way you have unblocked access
inside the fuselage and wings to
get the servos, extensions, and
pushrods in place.
Shown here are several photos
with sample installations in the
wing and fuselage.
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
