HYDRODYNAMICS AND SIMULATION IN THE CANADIAN 

 HYDROFOIL PROGRAM 



R. T. Schmitke and E. A. Jones 



Defence Research Establishment Atlantic 

 Dartmouth, N. S. Canada 



ABSTRACT 



Hydrodynamic aspects of the Canadian hydrofoil 

 program are discussed, with particular reference 

 to HMCS BRAS D'OR. Associated simulation stu- 

 dies are described and key results of BRAS D'OR 

 seakeeping trials are presented. 



I. INTRODUCTION 



For more than a decade the Canadian hydrofoil program has 

 been synonymous with the design, construction and trials of HMCS 

 BRAS D'OR^ '(Figure 1). The recent suspension of trials and sub- 

 sequent mothballing of the ship make this an appropriate time for a 

 comprehensive review of design experience in the light of trials ob- 

 servations. This paper is particularly concerned with the hydrodyna- 

 mics of the hydrofoil system and associated simulation studies. 



Factors governing foil system configuration and hydrodynamic 

 design are described, with some details of development experience at 

 the model scale and a thorough discussion of full scale trials obser- 

 vations. The mathematical models used in simulation studies are then 

 presented, and predictions of steady state and dynamic performance 

 are compared with trials data. The paper concludes with an analysis 

 of BRAS D'OR seakeeping trials. 



II. FOIL SYSTEM HYDRODYNAMICS 



Sy stem Configuration 



Since its inception the Canadian hydrofoil program has been 



293 



