The hull is taking shape. Next the author will
cover it with paper and add scale detailing.
The hull sides are glued to the bulkheads.
The longerons will be added next.
The plywood doublers are glued to the
hull sides and the fuselage bulkheads
are positioned and pinned to the building
board. Notice that the tabs are attached to
Here the bottom sheeting is being glued to
glue the TE
( 59) to the
top and bottom
Before gluing the top
sheeting to the outer wing panels,
sand the TE so that it tapers to nothing, as
shown on the plans. Pull in the aileron servo extension wires
from the F4 to F6 ribs.
The top sheeting of the other wing panel is in two halves—one
is from the rib F4 to the last F5 rib, and the other is from the F5
rib to the wingtip.
Glue the top sheeting to all the ribs and spars between F4 to
the last F5 rib. After that, glue the top sheeting from the F5 rib to
the wingtip. Glue two strips of foam ( 58) to the LE and glue the
aileron hinge spar ( 61) to the TE. Sand the wing panels.
Glue ribs W3 to ribs W2 and to ribs W4. Flip the wing panels
on their backs. Drill 1/8-inch holes in the plywood blocks ( 60)
between ribs W2 for the cabane struts and drill 3/32-inch holes
into the plywood blocks between the W6 ribs for the screws,
which will hold the wing struts. From a 1/4-inch-thick balsa sheet,
cut out the ailerons. Cut out the opening for the aileron servo.
Sand the wing panels and put them aside.
Building the Fuselage
Transfer the shape of the hull side onto 3/8-inch foam sheets.
(The actual shape of the side is shown at the top of the plans
drawing number 2.) Cut out the hull sides ( 16). Glue the
plywood doubler ( 7) to each hull side ( 16) in the location shown
on the plans. Cut out all of the plywood and foam bulkheads.
Notice that most of the bulkheads have tabs at the top. Cut
them out and then reattach them with
masking tape. These tabs keep the
bulkheads at the right height when
building the hull upside down.
Pin the bulkheads upside down to
the building board. Glue in the front keel ( 1) and rear keel ( 2)
to the formers. Glue the top ( 3) and bottom ( 4) longerons to the
bulkheads. Each front longeron—from former F1 to former F5—
is cut lengthwise in the middle, so they are easy to bend when
you are gluing them to the formers. Glue the hull sides to the
bulkheads. Sand the longerons so that they follow the bulkheads’
contour. Glue the hull bottom sheets ( 8) and ( 9) to the hull sides
and to the bulkheads.
Behind the bulkhead F8, make a secondary step by gluing
the step sides ( 10) to bulkheads F9 and F10 and to the bottom
sheeting ( 9). Glue the bottom foam sheeting ( 11) to the sides
( 10). Make the bottom of the hull dent resistant by using contact
cement to glue balsa sheets ( 12) and ( 13) to the hull bottom.
Flip the hull right side up and remove the tabs from the
bulkheads. Glue the battery floor ( 67) to bulkheads F2 to F6.
Where bulkhead F10 is located, glue in the mounting beams for
the elevator and the rudder servos. Glue in the top longeron ( 14)
to all of the formers. Take the fin ( 20) and feed the flexible tubing
for the elevator and the rudder through the holes in bulkheads
F12 to F7. Glue the fin to the hull.
Glue the top foam sheeting ( 15) to the hull sides and to all
of the formers. Glue the balsa nose block ( 16) to former F1. At
formers F6 and F8, cut out the foam in the hull sides all the way
to the doublers. Glue in two hardwood blocks
( 30) to the doubler ( 7). In the hardwood
blocks ( 30), drill the holes for the cabane wire
struts and sand the hull.
Between bulkheads F3 and F5, cut a large
49 Model Aviation APRIL 2014