© 2008 Stevens AeroModel.
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14. Create center section dihedral break rib R5 by laminating 1/32 in. ply outer rib facing R5a (sheet 19/21) to 3/32
in. balsa rib R5 (sheet 06/21). It is strongly suggested that you lay the parts out MIRRORED to one another, as
illustrated below, to create a right and left R5 rib assembly. Register the parts to one another matching at
notched locations you may also use a 3/16 in. and/or 1/8 in. drill bit to register parts where they have been
drilled by the laser. Use a medium CA glue to give yourself ample working time to register and bond parts.
Note: The R5 assembly needs to be perfectly straight to properly mate to the wing tips – when laminating these
parts you should work on top of a flat work surface.
With the 1/32 in. ply facing to the OUTSIDE, fit the completed R5 rib assembly to the left and right of the wing
center section as illustrated below. Stand your wing up on end and seat R5 completely against the angled edge
of the spar web and trailing edge. Now make certain that R5 is flat against your work table and bond R5 with
CA glue where it makes contact with the notched trailing edge and the spar.
15. Locate the 1/16 in. ply tip spar pocket S8 (sheet 20/21) and fit to FORWARD surface of spar web between rib
R4a and R5 as illustrated below. The outer edges of S8 must fit flush against ribs and spar caps. Once
satisfied with the fit bond with thin or medium CA glue. Note: don’t make a mess of the glue job here as globs
of glue along the inside edge of S8 will cause fit issues when installing the Delrin tip spars.
