Owner manual

❏ 14. Prepare the die-cut 1/16" [1.6mm] balsa rudder
skins by cutting out the corrugations and gluing on the corrugation fillers the same as the fin skins.
❏ 15. Remove most of the T-pins holding the fin
framework to the building board, but leave a few of them in R1 and R6 to hold the structure down. Make sure none of the pins will be concealed under the skin after it has been glued into position.
Refer to this photo for the following two steps.
❏ 16. Test fit the left fin skin to the framework and
see how it lines up. The bottom of the skin should align with the dashed line indicating the bottom of the skin on the plan. After you see how the skin fits, glue it into position with medium or thick CA.
❏ 17. Glue the left rudder skin into position the
same way.
❏ 18. Take out any remaining T-pins and remove the
fin/rudder assembly from the building board.
❏ 19. Trim off the jig tabs with a hobby knife, then use
a razor plane followed by a bar sander with 80-grit sandpaper to trim the leading and trailing edges even with the ribs. Using the ribs in the rudder as a guide, bevel the trailing edge of the left skin to accommodate the right skin as shown in the sketch and on the cross section of the fin drawing on the plan.
❏ 20. Referring to the plan, cut the hinge blocks
from a 1/2"x 1/2"x 24"[12.7 x 12.7 x 610mm] balsa stick. Trim the blocks so that when in position, they will be 1/16"[1.6mm] below the surface of the ribs to accommodate the 1/16"[1.6mm] balsa corrugation filler strips on the right side of the fin and rudder skins. Glue the hinge blocks into position.
Refer to this photo for steps 22 through 26.
❏ 21. Test fit, then glue the rudder and fin skin into
position on the right side. Align them the same as was done for the skins on the left side of the assembly.
❏ 22. Sand the leading edge of the skins even with
the sub leading edge. Trim the bottom of the skins and the spars even with rib R1 and R1A.
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