Top Flite TOPA0405 - Manual (Page 19)

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13. Insert the die-cut 1/8" plywood F-8C into the
aft end of the radiator assembly. Make sure all the
edges are square and properly aligned. Make
small adjustments to the notches if required. Use a
90° triangle to hold the radiator assembly vertical
while you glue it to F-8C.
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14. Remove the rear stick. Work the assembly
into position in the center of the wing. Trim the aft
spars and flap LE, if necessary, to fit the assembly.
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15. Notice that the die-cut ribs RC-1, in the
assembly are undersized 3/32" (except in the area
around the top of the center tray) to allow for a
center doubler of 3/32" balsa center sheeting. Put
marks 1-1/8" on each side of the dihedral brace
centerline to help in the alignment of the
center assembly.
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16. Use 6-minute epoxy to glue the front of the
radiator assembly in position by aligning the top
edge of the assembly with the top of the dihedral
brace and the marks you made in the previous step.
NOTE: The word “top” refers to the top surface of
the wing. The aft cross brace should protrude
about 3/32" above and below the edges of the
RC-1 ribs to allow for the double sheeting. Wipe off
any excess epoxy on the top and bottom of the
radiator frame before it cures.
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17. Trim the length of the 1/4" plywood beveled
edge wing bolt plate until it fits between the two
W-2 ribs near the centerline.
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18. Mark a centerline on the wing bolt plate.
Mark a line offset 1" on both sides of the centerline.
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19. Mark a line offset 2-1/4" on both sides of
the centerline. Draw a line perpendicular to the
centerline 3/4" from the angled edge. Drill 13/64"
pilot holes at the intersection of the lines.
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20. Glue together the two die-cut 1/8" plywood
W-1A’s, the die-cut 1/8" plywood front spacer
plate and the wing bolt plate as shown. Use a 90°
triangle to check the alignment as you glue.
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