Apply silk to the bottom of the wing first.
wings may require separate pieces of silk on each half of the wing
instead of a single piece. If that's the case then the silk should
overlap at the center of the wing by approximately one inch.
If the wing has several degrees of dihedral then you may be able to
silk the bottom with one piece. The top may require two pieces.
Be sure to cut the silk with the grain correctly aligned.
Silk has very subtle finished edges. The weave of the silk should
run with finished edges parallel to the span.
Cut the silk
about 3" longer than the span and chord. That gives you 1-1/2" all
the way around to work. When the silk is wet you will have even
more to work with because the silk will stretch quite a bit.
Take the time to align the silk so the weave isn't skewed to the
wing. The weave is very visible in the finished product.
The silk won't stay in place when it's dry but do take the time to
stretch it out as much as possible. Don't worry that it pulls back
to its center.