GROUND PERFORMANCE 63 



/w N r^V dz/n 

 = (V - v w )\ -j- - -r- 

 \dx dx \ 



but v w is constant, . . - - = o 

 dx 



.:*&- (V 



(V 



. dx 



df 



M 



2 T - KV 4 T - KV S 



M ^V) ^V 



2 T - KV 2 "T - KV 2 



put "" -' (a) 



, 



" 



M </(T - KV 2 ) 



2K T - KV 2 H^ a 2 - V 2 ' 



Now ~ = ^log(T - KV 2 ). 



And *L S = -ir 



a 2 - V 2 2aia + V a - 



JJ^L 4. ^ 1 



2aLa + V a - VJ 



I r<a + V) _ d(g - Vn 

 2a[ a + V a - V J 



2a 



