Theory of Unsteady Propeller Forces 



Vu 1 CD 



77^ 1 



% 



3 _r 



du' , 



9 = 





(59) 



and from Eqs. (26), (27), and (28) we get 



_iL + v*o 



(SR) 



du 



(60) 



Neglecting small quantities of higher orders, the boundary conditions of Eqs. 

 (32) and (34) are rewritten 



B^*o 



mt^i^i'Vi) ^ (_i)'<-i 



^4(^i'^i) 



^zo(^i.-^i) 



(SH) 



^^1 



d<P* 



3^ 



(SH) 



^^o(^i'^i) 



(SH) 



'^1 



B(A*o 



(SR) 



9zp(T7j,u) 





,*o 



ix 



(SR) 





(61) 

 (62) 



Then the pressvure p*" is obtained from Eq. (36) by 



211" ly iz 



9^*0 



1^ 1"/ \ Bt] 



Here, of course, we can substitute theoretically 



Bs " ""o TT 



Bz* 



(63) 



(64) 



33 



