Hydrodynamic design of a stern flap appendage for the HALIFAX class frigates


  1. Cumming, D.
  2. Pallard, R.
  3. Thornhill, E.
  4. Hally, D.
  5. Dervin, M.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
The HALIFAX Class frigates comprise a class of 12 warships that will represent Canada’s primary naval defence capability well into the 21st century. Driven by a concern regarding the escalating cost of fuel to operate the HALIFAX Class frigates, the Institute for Ocean Technology has been contracted by the Department of National Defence to carry out research, in collaboration with the Defence R&D Canada – Atlantic, to develop a viable stern flap appendage that will reduce hydrodynamic resistance for a Class wide blended annual speed profile with secondary benefits such as an increase in forward speed, improved propeller cavitation performance and a reduced stern wave system. Research carried out by other navies has shown that the addition of a suitable stern appendage can reduce warship fuel costs from 5 to 10% depending on the operational profile of the ship. This paper provides a detailed description of the hydrodynamic design process for an optimum stern flap appendage suitable for Canada’s HALIFAX Class frigates that includes a literature review, extensive physical and numerical modeling, data analysis procedure as well as example results.

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Report Number
DRDC-ATLANTIC-SL-2006-097 — Scientific Literature
Date of publication
01 Jun 2006
Number of Pages
Electronic Document(PDF)

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