Pien and Strom-Tejsen 



Fig. 3 - Propeller blade 

 element with camber and 

 chord line 



tan i/' = 





where x = r tan 7 + r0 tan /Sp. For q = we have 



tan i/* = 



Vo(x,r)^ + v(x,r,c^)^ 



-n 



(82b) 



(82c) 



where Uo(x,r)g and Vo(x,r)g are the circumferential average, zero harmonic, 

 wake velocity components. 



In Eqs. (82a) and (82b) u(x,r,0)g, u(x, r,<p)^, v(x, r,s6)g, and v {x,t,<P)^ are 

 related to the two unknown loading functions Ap. (p,fc')g and Ap. (p,i9)j^ by Eqs. (68) 

 and (70). Hence Eqs. (82a) and (82b) are two simultaneous integral equations to 

 be satisfied over the whole cambered surface. Various techniques are available 

 for solving such equations. A most appropriate method will be investigated in the 

 immediate future. For the case of q being equal to zero, only Eq. (82c) needs to 

 be solved. 



The total qth harmonic blade loading is obtained by integrating the loading 

 distribution over the whole lifting surface. We have 



Lqb = //APi(P,e)b dpd^ 



(83a) 



(83b) 



and 



116 



