Brard 



C I — c 2— 2c C 



"B ^B ,^ 



IB 



' AL ^^3~^i) 



^ (1) 



We need to know also: 



2W 2W , , , , , 



AL 



Sn ' ^n ' ^nR ' b , b , a„p ; 



'0 ' °0 ' °0B 



0, i/;, (/)'; 



y (2) 



Let us operate, for instance, without planes. We obtain the numerical val- 

 ues of the apparent coefficients linked with the out-phase forces and moment: 



l-*(0)-f(f) 



2W 

 AL 



2W 

 AL 



(M + A^i) - b 



(3) 

 (4) 

 (5) 

 (6) 

 (7) 



Consequently, from (3), we deduce the expressions of the function f . Equa- 

 tion (5) gives bgpp (and b) and also f ; Eq. (4) gives a second time the same 

 function f ' , and also 



, 2W 

 ' + Xl ^^3-A^i) 



Lastly Eq. (7) gives i[. 



By inversion of the Fourier integrals, we obtained 4^,'4j,<P' and also their 

 sine Fourier Transforms g . Going to the apparent coefficients linked with the 



900 



