Theory of Unsteady Propeller Forces 



, for m ?! , 



V , + ^r-^^ fv* 1 





Vg 



^x(^'i) - "^llivO 



R-T-p du , for m = , 



(99) 



m ^F K '= 1 "'bC^ 1 ) 



4^ E J '^'^1 J Sr„(t?;,u') Rlp„„ du' 



m r,„ - 1 



4tt 



I ^^' 1 ^n 



(^'.v') Plph dv' 



^EJ U^'i)dT7;J t*(T?;,u') 1.^(77;) R^p^ du' 



4rT J^ 



2 r'^ d ( ^ '1 > 



4^J d^i L J <°(^'i.Vi)H,p,„dVi 



where 





"0(^) 



V*n(^) - <n(^) 



in[9„(.^) + 9(f )v] 



for n ?! 



= < 



'^x*(^,v) 



^e(^) dv 



vSo(^) - <o(^) 



- _1_| £?(^')d^' j t*(^',v')W*(^') P^pdv', for n = , 



^B -1 (100) 



51 



