Table 1 65 



203 



SKIN FRICTION 



The surface friction on well-varnished surfaces of thin flat plates may be expressed in 

 the following form : 



R F = 0.037 sAqR- 0}& 



where Rf is the frictional force on the area A exposed to the stream, q is the velocity 

 pressure, and R the Reynolds Number based on the length of the plate parallel to the 

 wind direction. The values in the table apply when the flow is fully turbulent as in most 

 practical applications. (Cf. Technical Report 342 of the National Advisory Committee 

 for Aeronautics.) 



Smithsonian Tables 



