1 88 AEROPLANE PERFORMANCE CALCULATIONS 



The last column contains the data for use in later work. 



Propeller Performance Curves. We have already decided 

 to use V = 80, and found d = 106, also = 1750, 



80 



= -000431. 



.-. J = 



1750 x i 06 



The above, of course, is for standard density air. 



Machine Performance Curve. We will use the Variant of 

 the Third Method. Then from data already quoted or found 

 and from the drawing we obtain : 



