spacewalker SIGRC61, Building And Flying Instructions

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57. When dry, remove the elevator from the
board and trim it to the correct outline.
An easy way to do this is to make a
tracing of one elevator half and cut it out.
Place the tracing over the elevator, draw
around the outline, then sand it down to
the line. Repeat for the other half. Lightly
sand the top and bottom, and round all
the edges as you did with the stabilizer.
58.
Position the heavy-duty elevator control horn on the bottom of the elevator as shown on the plans. Mark the location of the
two mounting bolts, then drill the elevator at the marks with a 5/32" drill bit. Countersink the holes slightly on the top of the
elevator and install two 4-40 blind nuts. The horn is mounted using two 4-40x3/8" mounting bolts, but not until the elevator
has been covered and painted.
59.
Install the hinges in the positions shown on the plans. See "Hinge Assembly" (Plate 2) for more detailed instructions.
Fin And Rudder
The fin and rudder are assembled over the plan in the same manner as the stab
and elevators.
60.
a. Pin the laminated balsa/spruce fin trailing edge in place. Notice that the
trailing edge extends to the bottom of the fuselage.
b. Pin the 3/8"x3/4" balsa fin leading edge in place. Notice that the leading
edge extends down below the stabilizer.
c. Glue the four 3/8" sq. balsa ribs in place.
d. Add the 3/16"x3/8" balsa diagonal ribs.
e. When dry, remove the fin from the board and sand the leading edge, top
edge, and trailing edge round. Leave the bottom 3/8" sq. balsa rib
unsanded so that it can sit against the stabilizer.
61.
a. Pin the 3/8"x3/4" balsa rudder leading edge to the plan.
b. Glue R-1 through R-5 in place.
c. Add the 3/8" sq. balsa ribs and 3/16" x 3/8" balsa diagonal ribs.
d. When dry, unpin the rudder and sand all of the edges round.
62.
Carefully carve a relief in the bottom of the rudder to accept the rudder horn.
Epoxy the horn in place, then drill through the horn and rudder with a 3/32" drill bit.
Install a 2-56 x1/2" screw and 2-56 hex nut to anchor the horn to the structure.
63.
Install the rudder hinges in the positions shown on the plan.