Gull II
The wing assembly is built directly over the plans (above left). The spar is built up using the provided detail drawing first, then the outer panels and center section added. Ribs are assembled onto the spar and pinned over the plan. Leading and trailing edges and the tip bows are added next, followed by the
square balsa. The front end is sheeted with 1
⁄16 -inch soft balsa. Trim and sand the sheet-
ing flush with formers 1 and 4, then glue the firewall (FW) in place on former 1 and sand to shape. Bend the main landing gear from .078-
inch music wire and glue it into the fuse- lage, followed by the lite ply lower support (B8) and gussets (B8A). Bend the tail skid from .046-inch music wire and glue it in place on former 10, and then glue B9 in place. And finally, make up the rear cock- pit fairing from file folder paper using the provided pattern and glue it in place to complete the frame. Vertical stabilizer: Pin D1 in place over the plans, followed by the 1
⁄8 ⁄8 × 1 -inch balsa ribs and diagonal bracing ⁄8 ⁄32 -inch square bal-
sa leading edge and laminated trailing edge. Add the 1 1⁄16
-inch square balsa hinge spars and
and D2. When dry, remove the frame from the board, cut the rudder free and sand to shape. Cut the hinges from light CyA hinge stock 5
inches wide×½-inch long, make the
notches in the hinge spars and dry fit the hinges to complete the assembly. Horizontal stabilizer: Pin the main
spar (C1) and front spar (C2) in place over the plan, using a couple of ribs to insure
turbulator spars and diagonal bracing. The completed wing assembly (above right) is removed from the plan then carved and sanded to final shape. After a final detail sanding, the wing is ready for covering. Light weight, yet strong is the design of the Gull IIwing.
proper spacing. Fit all the ribs (SR1–SR5) in place and glue. Fit and glue the 1
⁄8 -inch
square balsa leading edge in place, followed by the laminated trailing edge. Fit the ele- vator hinge spar (C3) in place, followed by SR1E, C4 and C5. Fit and glue the remain- ing ribs (SR2E–SR5E) in place and glue. Remove the assembly from the board, cut
the elevator from the stabilizer and sand to final shape. Make up the hinges from CyA hinge stock, cut in the notches and dry fit the hinges in place to complete the assembly. Wing: Begin by building the main spar assembly directly over the assembly draw- ing to insure proper alignment. Glue A1 and A1A together, then join the spar in the cen- ter and glue the dihedral braces (A3) in place, one on each side of the spar. Before you build the wing assembly, cut the wing tip drawing from the plans and tape it in place on the wing drawing. Pin the main spar in place over the left
hand wing plan. Fit all the ribs (R2–R5) in place on the spar, followed by the leading and trailing edges. Fit the tip bow in place using the provided detail drawing as refer- ence to pre-trim the angle at the trailing
edge. Glue the bow in place, followed by the 3
⁄32 -inch square balsa turbulator spars and
diagonal bracing. Align the diagonal bracing flush with the top of the rib/main spar intersections. With the first panel complete, remove the assembly from the board, rock it over onto the right hand spar and pin it in place. Block up the left hand panel to keep it all steady and prevent damage during construction. Build the left panel in the same fashion as the right. With both panels complete, rock the wing
onto the flat center section, support the pan- els with blocks and pin it in place. Laminate the trailing edge (A4-A4A) together and glue it in place followed by the center rib (R1), A5, and the leading edge. When dry, remove the wing assembly from the board and sand to shape.
Installing the radio and motor components Fit and glue the servo mounts into the fuselage. Space the servo rails to fit the ser- vos used. The rudder servo is mounted on center, and the elevator servo on the right side. Run in the elevator pushrod tube and glue it in place in B11. Slip four pushrod stand-offs (PRSO) in place on the tube and glue in place at the front end and three
The finished frames are detail sanded in prep for covering (above left), then the major components dry fitted to insure a good fit before the covering is
42
applied. The balsa servo mounts are fitted and glued in place (above right). The rudder servo mounts on center; the elevator servo is mounted on the R. H. side.
DECEMBER 2011
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