expected of linear theory. It should be remembered that the present design theory 

 does not include semiempirical formulae or factors. In addition, this verifies that 

 the point drag of linear theory is very useful in solving one of the important 

 problems relating to supercavitating propellers — how to make propeller blades having 

 sufficiently thick leading edges without paying too much of an efficiency penalty. 



ACKNOWLEDGMENTS 

 The authors express their gratitude to Dr. William B. Morgan, Mr. Gabor F. 

 Dobay, and Mr. Edmond R. Caster who managed the overall project and provided much 

 encouragement. The authors would also like to thank the staff at the DTNSRDC 36- 

 inch Water Tunnel Facility for their cooperation during the propeller experiments. 



36 



