Uram and Numata 



Part of the acceleration data obtained by VanMater [7] is shown in Fig. 25. 

 It is seen that in 1.0 L regular waves the unusual surface ship forms are supe- 

 rior to the destroyer, while in 2.0 L regular waves they offer greater acceler- 

 ations. No acceleration data was obtained for the Hydrofoil Semi-Submarine, 

 but, as we will see, a study of the motion picture records indicates the pitching 

 motions are of low frequency, resulting in relatively low pitch accelerations. 



It has been our pleasant task to attempt to collect and summarize the work 

 done on unusual ship forms and realizing the inadequacy imposed by space and 

 time limitations, we hope we have furnished an up-to-date balance sheet to aid 

 those interested in possible application of the unusual ship form concepts. 



REFERENCES 



1. Third Symposium on Naval Hydrodynamics, Office of Naval Research ACR- 

 65, September 1960 



2. Lewis, E. v., "Ship Speeds in Irregular Seas," SNAME Volume 63, 1955, 

 pp. 134-174 



I 



3. Mandel, P., "Subcritical and Supercritical Operation of Ships in Waves," 

 SNAME Journal of Ship Research, Volume 4, No. 1, June 1960 



4. Uram, E. M., "Research on High Speed Ship Forms," 4th Seminar on Ship 

 Behavior at Sea, June 1962, Davidson Laboratory TM 136, January 1963 



5. Mandel, P., "The Potential of Semi-Submerged Ships in Rough Water Oper- 

 ation," New England Section SNAME March 1960. (See also Sahlgren, J. A., 

 "The Performance of a High Speed Displacement Ship in Critical and Super- 

 critical Operation", SM Thesis, MIT, 1959) 



6. Lewis, E. V. and Odenbrett, C, "Preliminary Evaluation of a Semi-Sub- 

 merged Ship for High Speed Operation in Rough Seas," SNAME Journal of 

 Ship Research, Volume 3, No, 4, March 1960 



7. VanMater, P. R., "Preliminary Evaluation of a Large-Bulb Ship for High 

 Speed Operation in Smooth Water and Rough Seas," Davidson Laboratory 

 Report 834, May 1964 



8. Uram, E. M., "Study of the Design and Behavior of a Hydrofoil Semi- 

 Submarine," Davidson Laboratory Report 1023, August 1964 



9. Mandel, P., "A Comparative Evaluation of Novel Ship Types," SNAME 

 Trans. Volume 70, 1962 



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