Stitching - Cub Crafters CC18-180 Maintenance Manual

(4) STITCHING

A modified seine knot will be used for stitching and the knots and stitches will be hidden
under the fabric. The following text and sketches describe how this is accomplished.
Tie the first loop with a square knot as illustrated in Step 1 (Figure 1) and secure the
knot with a half hitch on each side after the lacing is pulled tight around the rib (Step 2
Figure 1). Then route the needle under the fabric and out through the next lace location,
then back down through the wing as illustrated in Steps 3 and 4 (Figure 1). Tie a
modified seine knot as illustrated in Steps 5 through 11 (See Figure 2 and Figure 3).
(1) Rotate each lace loop to place the knot at the side of the rib cap to reduce the
protrusion and aerodynamic interference before moving to the next lace location,
then route the cord under the fabric to the next lace location as illustrated in Step
3 and 4 (Figure 1). Cut the cord end off leaving a minimum of 1/4-inch stub
pulled inside. Lacing tension should be uniform.
(2) Repeated pulling of long lengths of lacing cord may remove wax coating from
the cord and cause fraying. Convenient lengths of rib lacing cord may be used to
lace long or thick ribs. Tie off the end of each length with a half hitch as illustrated
in Step 10 and 11 (See Figure 3), or if needed, separate lengths of lacing cord
may be joined by using the splice knot illustrated in Figure 4.
(3) Lacing is installed through other components, where applicable, in the same
manner as a wing. Single, wide space lace attachments, usually used on
empennage surfaces, are tied with a square knot and half hitch on each side, the
same as a starting wing rib lace illustrated in Steps 1 and 2 (Figure 1). The lace
may be rotated to place the knot under the fabric before cutting the cord.
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CUB CRAFTERS, INC.
CC18-180 MAINTENANCE MANUAL
Manual number TC10000AMM
Date: 05/20/08