140 M. P. Tulin 
CONCLUSION 
The subject of the hydrodynamics of high-speed hydrofoil craft has been far from exhaus- 
tively discussed here, even with regard to a cataloging of important problems. An effort has 
been made, however, to provide a little perspective as to the task that faces the designer 
and, in particular, to emphasize the problem of seaway induced dynamic loads, the related 
problem of load alleviation, certain problems connected with cavitation suppression—espe- 
cially in a seaway, and, finally, the problem of the varied effects of near-surface proximity 
on foil performance. An attempt has also been made to provide some new and useful infor- 
mation relating to these problems; it will be understood that much of this information is 
based on theoretical developments and calculations carried out by the staff of Hydronautics, 
Inc., which are themselves the subjects of separate papers, and could not for reasons of 
space be gone into in any greater detail here; it is a pleasure to acknowledge that a good 
many of these results that I have just referred to were obtained under a research program 
sponsored by the U.S. Navy’s Bureau of Ships. 
Finally, lest some of the conclusions that have been arrived at are interpreted as 
throwing some doubt on the feasibility of high-speed ocean-going hydrofoil craft, let us 
affirm our personal conviction that such craft will inevitably be successfully developed and 
will before too much time passes find their unique place in the transportation scheme of 
things. 
REFERENCES 
[1] Saunders, H.E., “Hydrodynamics in Ship Design,” Vol. Il, New York: The Society of 
Naval Architects and Marine Engineers, 1957 
[2] Geyer, L.A., and Wennagel, G.J., “A Feasibility Study of Hydrofoil Seacraft,” Pre- 
sented before The Chesapeake Bay Section of the Society of Naval Architects and 
Marine Engineers, 1958 
[3] Tachmindji, A.J., Morgan, W.B., Miller, M.L., and Hecker, R., “The Design and Per- 
formance of Supercavitating Propellers,” David Taylor Model Basin Report C-807, 1957 
[4] Tachmindji, A.J., and Morgan, W.B., “The Design and Estimated Performance of a 
Series of Supercavitating Propellers,” p. 489 in “Second (1958) Symposium on Naval 
Hydrodynamics,” Washington: Office of Naval Research, 1960 
[5] Press, H., Meadows, May T., and Hadlock, I., “A Reevaluation of Data on Atmospheric 
Turbulence and Airplane Gust Loads for Application in Spectral Calculations,” NASA 
Technical Report 1272, Washington, 1956 
[6] Brooks, R.L., and Jasper, N.H., “Statistics on Wave Heights and Periods for the North 
Atlantic Ocean,” David Taylor Model Basin, Sept. 1957 
[7] Neumann, G., and Pierson, W.J., “A Comparison of Various Theoretical Wave Spectra,” 
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