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Full text of "Scientific Papers - Vi"

915]     HYDRODYNAMICAL  PROBLEMS  SUGGESTED  BY PITOT'S  TUBES         335
It is easy to verify that the velocity is constant along the curve denned y (12), (13).    We have
dx __    p    d%         dy      1  f2 dt; nd when ty  0,
A
00
00
B
00=7T
Thus
Fig. 2.
dy _i-F
nd                                        (dx/d<f>y- + (dy/d<j>)* = I.........................(17)
The square' root of the expression on the left of (1.7) represents the 2ciprocal of the resultant velocity,
TABLE 111.    =    .
f	X	y	  	X	y
0	0	00	0-40	2-9667	+ 0-076
0-05	0-1667	9-098	0-50	3-0467	0-130
o-io	0-2995	3-008	0-60	3-1089	0-162
0-13	0-4668	1-535	0-80	3-2239	0-198
0-15	0-6725	0-766	1-00	3-3454	0-207 *
0-17	1 -0368	+ 0-109	1-50	3-6947	+0-125
0-18 	1-2977	-0-143	2-00	4-0936	-0-112 .
0-19	1-5907	-0-304	2-50	4-5234	-0-501
0-20	1 -8708	-0-370	3-00	4-9725	- 1 -032
0-22	2-2828	-0-331	4-00	5-9039	-2-536
0-25	2-5954	^0-195	6-00	7-8305	-7-161
0-30	2-8036 *	-0-047