Figure 21 - Slope of C versus J Curve for Propeller 4718 



1.8 



1.6 — 



1.4 



1.2 



1.0 - 



0.8 — 



0.6 — 



0.4 — 



0.2 — 



0.0 



-0.2 — 



-0.4 



"u 



I 



I 



i i 



O SUCTION (+) SLOPE _ 

 D PRESSURE (-) SLOPE 



— ' 







A SUCTION I EQUIVALENT 

 O PRESSURE J2-D THEORY ~ 



- 



oA 





- 











- 





x^lL 



"~-J3J^--^ 



- 



i 



i 



i i 



0.2 



0.4 0.6 



x/c 



0.8 



1.0 



Figure 21a - r/R =0.5 



138 



