Comparison of Theory and Experiment on Ducted Propellers 



Fig. 3 - Pressure distribution on NSRDC duct I, 

 a =6 degrees and = 180 degrees 



O EXPERIMENTS OUTSIDE 



# EXPERIMENTS INSIDE 



— CHAPLIN I 181 



LINEARIZED THEORY (LINEARIZED BERNOULLI) 

 LINEARIZED THEORY WITH NONLINEAR 

 APPROXIMATION |33l (LINEARIZED BERNOULLI) 



Fig. 4 - Pressure distribution on NSRDC duct II 

 at zero angle of attack (a = 0) 



1319 



