The hardwood blocks for the landing gear are glued to the ribs. The
blocks have grooves to accept the landing gear wire.
The 1/32-inch plywood doublers are glued to the fuselage sides.
to W13. Glue on the top TE sheeting. Glue the sub-leading
edge (LE) sheet to all the ribs and sand its edge so it follows
the ribs’ contour.
Glue on the top LE sheeting. Apply adhesive to the balsa
sheeting between ribs W1 and W4 and between the LE and
the TE sheeting. Glue the balsa sheeting between ribs W10
and W13 as well. Glue the capstrips to the ribs.
Pull the extension wires for the aileron and the rudder
servos. Flip the wing onto its back and sand the sub-LE on an
angle so it follows the contour of the ribs. Apply adhesive to
the LE sheeting, but be careful to not alter the washout.
Glue the hardwood blocks together for the landing gear. The
landing gear blocks should have grooves in them to accept the
landing gear wire. Glue in the aileron supports and the rudder
servos. Glue the bottom sheeting over ribs W6, W7, and W10
to W13. Adhere the bottom capstrips.
Cut out the aileron from the wing. Glue the hinge spar and
the side plates to the wing. Attach the plywood plate inside
the aileron to hold the control horn. Glue the LE and side
plates to the aileron, then finish-sand the wing.
Build the other half of the wing in the same manner then
glue the two wing halves together. Smear adhesive onto the
plywood brackets and slide them behind the main spars
between ribs F2. Pin the dihedral shims under the W12 ribs.
Apply adhesive to the W1 ribs and pin them to each other.
After it has set, remove the wing and glue in the hardwood
block to ribs W1 and W2 to hold the wing bolts. Glue the
plywood plate to ribs W1 and the LE sheeting to support the
hardwood dowel. Insert and squirt adhesive in the hardwood
dowel. Glue on the bottom sheeting between the W4 ribs to
enclose the bottom of the wing.
Building the Fuselage
Cut out all of the formers, fuselage sides, and doublers.
The outline of the fuselage is indicated with small triangular
Most of the formers are composed of three or four
sections: the center, sides, top, and bottom. Mark the
location of the formers on the inside of the fuselage sides.
With a strong thread, attach the 5/32-inch brass tubing to
former F6 as shown on the drawing. Place formers F1 on
top of F2 and drill holes for the 1/4-inch magnets and the
1/8-inch dowels. Do the same for formers F23 and F24.
Glue the 1/32-inch doublers and the top 1/4 x 1/8-inch
spruce longeron to the fuselage sides. The fuselage is
initially built upside down. Pin the plywood center section
of formers F6 to F18 to the building board, and adhere the
fuselage sides to them. Glue in the battery floor between
formers F6 to F12, and the wing bolt hardwood blocks to
former F15 and to the fuselage doublers.
Flip the fuselage right side up and pin it to the building
board. Insert and glue the center section of formers F3 to
F5 and F20 to F23 between the fuselage sides, the 1/2-inch
triangular stock to formers F3, F6, and F23 and the fuselage
sides, and the top quarter section of all of the formers to the
center section of each former. Glue the side quarter formers
to the outside of the fuselage sides. Glue the 1/4 x 1/8-inch
balsa stringers into the notches in the formers that have
them. If the former does not have notches, it is sheeted with
The photo of the model before it is covered (on the
opposite page) shows the location of the stringers and the
sheeting. When the top and sides are complete, flip the
fuselage upside down and glue the bottom quarters of
formers F3 to F12 in place. Again, glue the balsa stringers to
the formers that have notches on them. Glue the 1/8-inch
plywood plate to the bottom of the F6 former to support
the nose landing gear.
Place former F1 on top of F2 and drill the holes for the
40 Model Aviation MARCH 2015 www.ModelAviation.com