Fig. 68. [↑]
Fig. 67. [↑]
The two kites just described may be modified in a number of ways as follows:—Two square kites side by side will give [Fig. 69], and three side by side [Fig. 70]; these might be increased in both directions until a kite like [Fig. 71] might be evolved. But there is no great gain and much hindrance in some of these complications. If there is insufficient room between upper and lower surface, not all of the surface is exposed and there is skin friction, again if there is not space enough between the fore and back cells, the front cuts off the air pressure to some extent on the back cells. So [Fig. 72] is not high enough, while [Fig. 73] has the fore and back cells too close together. [Fig. 74] is very unstable in the air.
Figs. 69, 70. [↑]