This speed is found to
produce a current sufficiently rapid for practical purposes, and
twenty-four pulls or beats per minute correspond to a length of
suspending cord of fifty inches.
* * * * *
HOW TO MAKE A KITE WITHOUT A TAIL.
The following is the method of making a kite without a tail: All the
calculations necessary in order to obtain the different proportions are
based upon the length of the stick, A'A, employed. Such length being
found, we divide it by ten, and thus obtain what is called the unit of
length. With such unit it is very easy to obtain all the proportions. The
bow, K'K, consists of two pieces of osier each 51/2 units in length, that
form, through their union, a total length of 7 units.
[Illustration: KITE WITHOUT A TAIL.]
After the bow has been constructed according to these measurements, it
only remains to fix it to the stick in such a way that it shall be two
units distant from the upper end of the stick. The balance, CC', whose
accuracy contributes much to the stability of the whole in the air,
consists of a string fixed at one end to the junction, D, of the bow and
stick, and at the other to the stick itself at a distance of three units
from the lower extremity. Next, a cord, B, is passed around the frame,
and the whole is covered with thin paper.
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