26 AEROPLANE PERFORMANCE CALCULATIONS 



L/W = g^ . (L/W) 



where 7 = - . . . (7) 



and S = j - . . (5) 



Equation (6) may be written 



T = OVV 2 (6') 



io 3 



where B = (i + ) 2 - i. 



Also equations (2) and (3) can be replaced by 



T - (JR, + Rl + R 2 ) 2 + . . (0 



and L = -0051^(5 + S')V 2 .... (3') 



By rearranging these three equations we have 



io 5 T -, 



' 



T _ R, R, + R, L/V (2 , } 



W" i9 ~T^~ L/D 



V 2 = -0051^8 + -oosi^S'JS . . . (3") 

 Substitute for B from equation (6") in equations (2") and (3") 



and we obtain 



i T 



V 2 H 



and 



These two equations can be written 



. 



V 2 L/U 



,T L/V 2 

 and c vt = - rf 



where <'-!- ^ . . (') 



y _ ^-iA 2 .... (if) 



