The entire bottom of the hull is covered with 1/16 balsa sheets.
The longerons are glued in. Each front longeron is split in half so in
can easily be bent. The battery floor is also glued to the bulkheads.
The sponsons are
opening for the removable hatch. In the rear, where the two
servo mounting beams are located, also cut an opening for the
servo access hatch.
Make the wing center pylon. Glue the plywood sides ( 18) to
the 1/4 x 3/8-inch balsa blocks. Glue the balsa sheets ( 17) to the
plywood sides. Glue the LE ( 19) to the pylon, then
sand to shape as shown on the plans.
Building the Sponsons
Cut 1/4-diameter carbon-fiber tubes ( 47) to the
proper length as shown on the plans. Slide the
tubes into S1, S2, and S3 and then glue them to the
ribs as shown on the plans. Place two shims of the
same height under the tubes while the glue dries.
Glue the TE ( 46) to the ribs. While the shims are
in place, glue the top sheeting (50) to the ribs and
to the TE. When the glue is dry, flip the sponsons
over and glue the bottom sheeting ( 49) to the ribs.
Glue the LE ( 51) to the sponsons.
Cap the end of the S3 rib
with 1/8-inch balsa sheet ( 63).
In the location shown on the
plans, cut an opening in the
top sheeting and glue in the
plywood blocks ( 48). Sand the sponsons and then put them
Cut out all cockpit sides. Using thick CA, glue the sides to
the crossmembers to form the cockpit and then glue on the
cockpit top. Brush the sealer onto the frame and after it’s dry,
sand the cockpit frame.
Building the Nacelles
Cut out plywood formers N1 to N4 and glue the magnets
to them. Check the polarity to ensure that the former N1 is
attracted to the N2, and N3 to N4. Next, glue in the guide
dowels to formers N1 and N4.
Using a 3/8-inch foam sheet, cut out the nacelle sides ( 33).
Glue the former N2 to the front of the nacelle and the former
N3 to the rear of the nacelle and then glue the sheet ( 36) to
the top of the nacelle. In the front, bottom part of the nacelle,
glue the sheets ( 39) to the N2 former and to the nacelle sides
Glue the sides ( 34) of the front cowl to the N1 former. Glue
the top sheet ( 37) to the N1 former and to the cowl sides.
Glue the sides ( 35) of the rear cowl to the N4 former. Glue
the top sheet ( 38) to the cowl sides and to the N4 former.
At the back of the cowl, glue a 3/8-inch foam sheet ( 40) to
the sides. Plug the cowls into the nacelle and sand to shape as
shown on the plans.
The model’s bare foam can be covered with the paper that
was removed from the foam boards, or with brown packing
paper. The fin, the rudder, the stabilizer, and the elevator
surfaces can be covered with lightweight Japanese paper or
Modelspan tissue paper.
Use carpenter’s glue that has been diluted to approximately
60% glue and 40% water to adhere the paper to the surface.
You can also use a water-based clear polyurethane sealer, but
don’t dilute it.
Before the covering is applied, brush one coat of the sealer
50 Model Aviation APRIL 2014