Monday, August 26, 1968 

 Afternoon Session 



UNSTEADY PROPELLER FORCES 



Chairmen: Ten. Gen. G. N. A. Siena 



Ministero Difesa, Marina 

 Rome, Italy 



and 



W. P. A. Van Lammeren 



Netherlands Ship Model Basin 

 Wageningen, The Netherlands 



Page 



Experimental and Analytical Studies on Propeller- Induced Appendage 



Forces 169 



A. F. Lehman and P. Kaplan, Oceanics, Inc., Technical Industrial 

 Park, New York 



Investigations on the Vibratory Output of Contrarotating Screw 



Propellers 235 



R. Wereldsma, Netherlands Ship Model Basin, Wageningen, 

 The Netherlands 



Experimental Determination of Unsteady Propeller Forces 255 



M. L. Miller, Naval Ship Research and Development Center, 

 Washington, D.C. 



The Response of Propulsors to Turbulence 291 



M. Sevik, Ordnance Research Laboratory, Pennsylvania State 

 University, University Park, Pennsylvania 



167 



