igS Table 159 



RESISTANCE COEFFICIENT FOR THIN FLAT PLATES NORMAL TO THE WIND 



The pressure on a thin rectangular plate varies with the " aspect ratio," a term intro- 

 duced by Langley for the ratio of the length of the leading edge (span) to the chord length. 

 The resistance coefficient is nearly independent of the Reynolds Number if the Reynolds 

 Number (L taken as the chord length) is greater than ioo. In the following table the 

 values of C are given as a function of the aspect ratio. A is taken as the area of the plane, 

 viz., product of chord and span. Values of C for circular disks are practically the same 

 as for a square plate. 



Aspect ratio i 



C i.ij 



2345678OO 

 1. 18 1.22 1.24 1.26 1.28 1.30 1.32 2.00 



1 1 1 1 r 



- 12 JL_ 



AspectRatio 6 ,' 2 N 

 Co 



0.5 H 



04- 



TCP- 



03- 



-02 H 



I 10 1 2,0 1 3,0 I 4,0 I 5,0 I 6,0 



7,0 I 81O 1 ^0 



Coefficients of Rectangular Plates, See P. 199. 

 Smithsonian Tables 



