342 



TABLE 340C— FORCES ON SPHERES (FIGS. 8-10) (concluded) 



K 



.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2A 2.6 2.8XI0 3 



CRITICAL REYNOLDS NUMBER, R CR 



Fig. 9. — The value of -p- ( y ) = K plotted as a function of the critical Reynolds 



number, R cr . 



At Mach numbers greater than about 0.3 the drag coefficient Cd depends on the values of 

 both Reynolds number and Mach number. 



.7 



.6 



.5 



.3 



.2 



REYNOLDS NUMBER R 



Fig. 10.— The drag coefficient for a sphere as a function of the Reynolds number for 



several Mach numbers. 

 SMITHSONIAN PHYSICAL TABLES 



