GREAT PLANES Spectra Instructions Manual page 14

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NOTE TAPER OF WEBS
W9-W10 W8-W9 W7-W8 W6-W7 W5-W6 W4-W5
DD 8.
Glue the webs into their respective places using
thick CA. The thinnest end of each web goes towards the tip
of the panel.
DD 9.
Cut and sand the trailing edge, spars and leading
edge flush with rib W10.
DD 10. Glue the 7/8" x 1-3/16" x 6-1/4" Triangle Wing
Tip Blocks (SPRTW15) to W10 with thick CA. The sketch
below and the cross sections on the plan shows how the block
should be attached to get the correct tip shape.
Tip Rib W10
Wing Tip Block
DD 11. Carve and sand the wing tip to blend with rib W10.
Be careful not to change the shape of W10 while sanding the
tip. There are three section views on the left wing plan and
three photos above to help show you the desired shape. Do
not sand the trailing edge of the tip too thin or it will get
damaged easily; 1/16" thick is fine.
DD 12. Apply several drops of thin CA to the rear portion
of the balsa wing tip. Allow the glue to soak into the wood and
cure. The glue will help harden the wood and protect it from
damage.
14

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