Fuselage Continued
29.
Fit two stringers “B to the inner notches on the
right
and
left
side of the
center
stringer “A”.
Again, stringer will span formers F12, F3, F11, and come to rest on top of F10. Bond
stringer where it contacts all formers with the exception of F10
30.
Fit two stringers “C” to the outer notches on the right and left side of stringer “B”. Bond
stringer where it contacts all formers with the exception of F10
Complete the stringer installation by spacing the ends of the stringers equally where they
contact F10. Bond with CA to retain.
Fuselage Finishing Instructions
31.
Revisit any tack glue joints with medium CA glue to thoroughly bond assembly. Using a fine
grit sand paper and sanding block, lightly sand all exterior surfaces of the fuselage. Protect
the motor shaft with a small piece of masking tape then, shape/sand the nose bowl / cowl to
the contours shown on the plan. (Tip: You’ll want to knock the “stair steps” off the balsa
parts that form the nose bowl / cowl - this will go a long way to producing the final proper
shape) Fill any cracks or gaps in your nose bowl after shaping using balsa colored wood
filler, allow to cure, then lightly sand to a smooth finish.
Tail Surfaces
32.
Fit and bond the 1/32 plywood elevator joiner E1 to the elevator halves E2. (Tip: Use a
straight edge to align the leading edge of this assembly prior to committing parts with glue)
33.
Follow the “Tape Hinge Diagram” on the plan and bevel the leading edge of the elevator
and the rudder R.
Lightly block sand the elevator, rudder, vertical “V”, and horizontal “H” stabilizers in
preparation for finishing and final assembly.
Wings
Wing parts are designated with a “W” followed by a numeric. Parts have been numbered so that the wing
assembly and required parts follows in numeric order from W1 to W13. Most of the assembly will be
lightly tack glued together, final bonding taking place during the final assembly stages.
Center Section
34.
Lay the
center
section W1 on the table with the etched side facing
up
. Fit two ribs W2 to
the slots at the trailing edge of W1, with arrows on the ribs pointing toward the leading edge
of W1 and etched triangles on side of rib parts to inside of assembly. Bond at trailing edge.
Now, turn the center section over on a flat surface. Carefully wrap W1 over the ribs and
tack glue at the leading edge of each rib. If W1 will not accept the bend easily, lightly
moisten the
forward
and
top
edge of W1 with glass cleaner and allow to soak in for a minute
or two. This should render W1 more flexible, and allow it to accept the curve of the ribs.
After W1 has been tack glued in place, turn the center section back over and final bond the
ribs to W1 by wicking CA along the mating surfaces between the ribs and W1.
35.
Create a wire jig to assist with part location. Cut a length of the 1/32 (.032) wire to 2-3/4 in.
long from the provided 12 in. piece. Slide this wire through the front holes in ribs W2. Slide
the remaining longer length of wire through the rear holes in the ribs.
Do not bond the
wires to the ribs!
Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.
!
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