202 



Tables 1 63 {continued) and 1 64 



TABLE 163 (continued). — Forces on Miscellaneous Bodies 



Reynolds 



Body C Number 



Struts (bodies streamlined in two dimensions) 0.06-0.08 above 40,000 



Streamline bodies of revolution 0.03-0.04 above 100,000 



Rectangular prism, 1x1x3, normal to 1 x 3 face 1.60 * 400,000 



Model of automobile .78 * about 300,000 



Cone, angle 60°, diam. base 40 cm, point to wind, solid.. .51 about 270,000 



Cone, angle 30 , diam. base 40 cm, point to wind, solid. . .34 270,000 



Hemisphere, convex to wind .34 170,000 



Hemisphere, concave to wind .13 170,000 



Concave cup 1.39 170,000 



Convex cup .35 170,000 



Sphero-conic body, diam. 20 cm, cone 20 point forward. .16 135,000 



Sphero-conic body, diam. 20 cm, cone 20 point to rear. . .088 135,000 



Cylinder 120 cm long, spherical ends .19 100,000 



* C varies very little with Reynolds Number. 



TABLE 164. — Forces on Cylinders 



Cylinder, base perpendicular to 

 length 



wind, 



diameter 



1 

 2 



4 

 6 

 8 

 14 



* Eiffel's values: See Table 159 for best value, 1.12. 

 Smithsonian Tables 



C* 

 1.07 



1.07 

 .88 

 .81 

 .82 

 .82 

 •94 



100,000 to 200,000 



