A square file is useful for shaping the notches.
Ordinarily stretchers do not tend to fall out, as the wind pressure puts
extra strain on them and keeps them up tight. But to prevent definitely any
movement one may insert screw eyes into the rods near the points at which
the stretchers press on them, and other eyes near the ends of the
stretchers to take string fastenings. These attachments will be found
useful for getting the first pair of stretchers into position, and for
preventing the stretchers getting lost when the kite is rolled up.
The bridle is attached to four eyes screwed into the rods near the tops of
the boxes. (See Fig. 118.) The top and bottom elements of the bridle must
be paired off to the correct length; the top being considerably shorter
than the bottom. All four parts may be attached to a brass ring, and all
should be taut when the ring is pulled on. The exact adjustment must be
found by experiment. In a very high wind it is advisable to shorten the top
of the bridle if you have any doubt as to the strength of your string, to
flatten the angle made by the kite with the wind.
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