Davis and English 



decision was made to conduct a feasibility and engineering study based on the 

 NRE proposals. This study was conducted by the De Havilland Aircraft of Can- 

 ada, and later, in 1963, the same company was selected as the prime contractor 

 for the design and construction of the vessel— a 200-ton ship intended for an all- 

 weather antisubmarine role in the Atlantic. 



The vessel has already been described on several occasions (Refs, 1, 2, 

 and 3), and therefore the brief description given here relates mainly to the pro- 

 pulsion system that has been employed. 



Figure 1 is an artist's impression of the vessel operating at high speed. 

 The foil arrangement used is of the canard type, in which about 90 percent of the 

 weight is carried by the after surface -piercing, noncavitating, main foil assem- 

 bly, the remaining 10 percent being carried by the forward foil system which is 

 designed to operate in the fully-cavitating condition. The power trains are con- 

 tained within the main foil assembly. Figure 2 shows the propulsion system 

 configuration that has been adopted, while Table 1 and Fig. 3 give the principal 

 characteristics of the ship. 



Fig. 1 - Artist's impression of HMCS Bras d'Qr 



The drive to the controllable pitch propellers is through the anhedral foils 

 as shown in Fig. 2, while the shafting for the fully cavitating propellers passes 

 down through the main struts to the propulsion pods situated at the intersection 

 of the main foil and dihedral foils. 



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