(See Fig. 119.) The slits through which it is thrust should be
strengthened with patches to prevent ripping of the material.
Two persons should hold a box out as squarely as possible while a stretcher
is measured. Cut a nick 3/8 inch deep in one end of the stretcher, and pass
the end through the fabric slits to the ring not on the wing. Pull the wing
out, holding it by its ring, and cut the stretcher off 1 inch from the
nearest point of the ring. The extra length will allow for the second nick
and the tensioning of the material. Now measure off the second stretcher by
the first, nick it, and place it in position. If the tension seems
excessive, shorten the rods slightly, but do not forget that the fabric
will stretch somewhat in use.
[Illustration: FIG. 121.--Box kite with front and back wings.]
Make the stretchers for the second box, and place them in position. The
wings ought to be pretty taut if the adjustments are correct, but should
they show a tendency to looseness, a third pair of stretchers of light
bamboo may be inserted between the other two, being held up to the rods by
loops of tape.
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