Smith 



5. Giesing, J. P., "Nonlinear Interaction of Two Lifting Bodies in Arbitrary 

 Unsteady Motion," ASME Paper 68-FE-22 (to be published in J. Basic 

 Engineering 



6. Bratt, J. B., "Flow Patterns in the Wake of an Oscillating Airfoil," British 

 ARC, R andM 2773 (1953) 



7. Spurk, J., "Measurement of the Aerodynamic Coefficients of Oscillating 

 Airfoils in the Wind Tunnel and Comparison with Theory," Max Planck 

 Institute Report 29, Gottingen, 1963 (also available as translation by G. de 

 Montalvo, Report LB 31959, Douglas Aircraft Co., Nov. 1964 



8. Faulkner, S., Hess, J. L., Smith, A. M. O., and Liebeck, R. C, "Charts and 

 Formulas for Estimating Velocity Fields in Incompressible Flow," 

 McDonnell-Douglas Report 32707, July 1968 



9. Wehausen, J. V., and Laitone, E. V., "Surface Waves," Encyclopedia of 

 Physics, Vol. IX, Berlin: Springer Verlag, 1960 



10. Smith, A. M. O., "Numerical Integration of Oscillating Functions having a 

 Non-linear Argument," Douglas Aircraft Co. Engineering Paper 3373, 

 (1967) 



11. Ogilvie, T. F., "Recent Progress Toward the Understanding and Prediction 

 of Ship Motions," in "Fifth Symposium on Naval Hydrodynamics: Ship Mo- 

 tions and Drag Reduction," Bergen, Norway, Sept. 1964, Office of Naval 

 Research, Department of the Navy, ACR-112 



12. Hess, J. L., and Wilcox, D. C, "Solution of the Problem of a Body Oscillat- 

 ing in the Presence of a Free Surface," Douglas Aircraft Co. Report DAC 

 33739, May 1967 



13. Bourke, R. D., "A Theoretical and Experimental Study of a Superconduct- 

 ing Magnetically-Supported Spinning Body," Stanford University, Dept, of 

 Aeronautics and Astronautics, SUDAER 189, May 1964 



DISCUSSION 



George P. Weinblum 



Institut fur Schiffbau der Universitdt Hamburg 

 Hamburg, Germany 



The paper by Hess and Smith, "Calculation of Potential Flows About 

 Arbitrary Bodies," has become within a short time a classical chapter in ship 

 theory. A more difficult special problem has been treated independently by 



362 . _ 



