154 AEROPLANE PERFORMANCE CALCULATIONS 



The curves of P T and P R on V as a base will be found plotted 

 on page 170 in connection with another example. 



Example (4). Performance of the Same Propeller at 10,000, 

 20,000, 30,000, and 40,000 feet. 



The engine being a stationary one,/ = *i6i and q = '839, 

 therefore we can draw up the following tables : 



