158 AEROPLANE PERFORMANCE CALCULATIONS 



Example (3). This Example Shows the Third Method. 



Suppose W = 5700, 7-2 x 135 



8-695, ' " = I - -l^- 



S' = 95, = -9568, 



-590, 510 



I= 135, *-7rf 



2 = 375, 367 



/-7, - = - 



/= J^'.j ^='0051 x -590x695 = 2 -09, 



= 



-9568 x 2-09 + -051 x -914 



5700 5700 



_ 



2 'GO +'047 2-047 

 14 



y = 2 , 

 16-1 



_ 8 



Now see table on next page. 



The values of P and V are plotted on page 157, and the 

 chain dotted curve is drawn through them, the opportunity being 

 taken to fair the curve slightly where the points are irregular. 



