FOREWORD 
In March 1960, Captain B. F. Bennett, USN of the Office of Naval Research 
London Branch Office contacted through the American Embassy in The Hague the 
Central Organization for Applied Scientific Research in The Netherlands (T.N.O.). 
As a result of this contact the Netherlands Ship Model Basin ( NSMB), one of the 
institutes administrated by this organization, was invited by Mr. Ralph D. Cooper, 
Head, Fluid Dynamics Branch, Office of Naval Research, to co-sponsor the third 
Symposium. 
Although time for preparation was rather short the NSMB enthusiastically 
accepted this invitation. 
The Symposium, dedicated by Dr. Th. Von Karman to Sir Thomas Havelock in 
recognition of his valuable contributions to naval hydrodynamics, was held at The 
Hague in September 1960. It was devoted to high-performance ships, such as 
hydrofoil boats, ground effect machines, deep diving submarines, semisubmerged 
ships and other special or unconventional configurations. This timely subject was 
of great interest to both hydrodynamicists and shipbuilders. Though the opera- 
tional value of these high-performance ships appeals primarily to naval interests, 
it was in addition very refreshing for practical shipbuilders who deal with prob- 
lems concerning commercial ships. 
The size, speed and type of ships that will be used within the near future is 
difficult to predict. To face the possibilities within our present day technological 
abilities was the aim of this Symposium. In this respect the Symposium can be 
qualified as very successful. 
It is my privilege to express the sponsors’ thanks to those who have con- 
tributed to the success of the Symposium:. to Professor L. Troost and Dr. Th. J. 
Killian who presented the addresses of welcome to the meeting, the first on behalf 
of the Central Organization for Applied Scientific Research in the Netherlands, the 
second on behalf of the USN Office of Naval Research; to the Chairmen of the 
Sections; to the authors and those who took part in the discussions; and to those 
organizations and companies who participated in demonstrations with various types 
of hydrofoilboats on the river ‘‘New Waterway’’ at Rotterdam and in front of 
Scheveningen Harbor, namely: 
Hydrofoilboat ‘‘Sea Wings,’’ designed and demonstrated by Dynamic Devel- 
opments Inc., for the U.S. Navy; 
Hydrofoilboat ‘‘Waterman” demonstrated by Aquavion Holland N. V.; 
U.S. Navy Hydrofoilboat ‘‘High Pockets’? developed by Baker Manufacturing 
Company for the U.S. Navy; 
Hydrofoilboat ‘‘Shellfoil’’ designed by Supramar A. G. 
Thanks are also due to Lips Ltd. at Drunen for the kind reception during the 
excursion to their Propeller Works. 
ill 
