TABLE 4 - GEOMETRY OF PROPELLER 4577 



Number of Blades 





7 





Expanded Area Ratio 





0.584 





Section Meanline 





NACA a = 



0.8 



Section Thickness Distribution 



BUSHIPS Type II'^^ 



Rake Angle, deg 





6.964 





Skew, deg 





30 





r/R 



C/D 



t/c 



P/D 



V« 



0.2106 



0.171 



0.235 



0.823 



0.0014 



0.3 



0.177 



0.209 



0.980 



0.0175 



0.4 



0.182 



0.182 



0.151 



0.0288 



0.5 



0.185 



0.158 



0.243 



0.0337 



0.6 



0.185 



0.135 



1.264 



0.0341 



0.7 



0.180 



0.116 



1.248 



0.0311 



0.8 



0.164 



0.0995 



1.206 



0.0246 



0.9 



0.132 



0.0875 



1.157 



0.0141 



1.00 



0.069 



0.0813 



1.108 



0. 



24 



Brockett, T. , Minimum Pressure Envelopes for Modified NACA-66 Sections 



with NACA a = .8 Camber and BUSHIPS Type I and II Sections," DTNSRDC Report 



1780 (Feb 1966). 



40 



