00000nam 2200000zi 4500 9.942995 CaOODSP 20240918115324 m o d f cr bn||||||||| 240909e198507##nscd ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre D68-21/11-1985E-PDF Ellis, Walter E., author. A new propeller performance prediction method for concept exploration models for displacement ships / Walter E. Ellis ; approved by B.F. Peters. Dartmouth, N.S. : National Defence, Research and Development Branch, Defence Research Establishment Atlantic, July 1985. 1 online resource (v, 24 pages) : graphs. text txt rdacontent computer c rdamedia online resource cr rdacarrier Technical memorandum ; 85/213 Digitized edition from print [produced by Defence Research and Development Canada]. Includes bibliographical references (page 21). "A new propeller performance evaluation method has been developed for use in Concept Exploration Models (CEM) for conventional destroyer-sized ships. The method, based on the use of a Wageningen-B series propeller, is simple and convenient to implement, provides outputs of efficiency and propeller rotational speed, and can be used to simulate fixed-pitch or controllable-pitch propeller installations. The Wageningen-B propeller is shown to be the most suitable of four candidate propellers for current CEM applications. Used in conjunction with the large diameters now considered feasible, this propeller gives near-optimum efficiency and produces the conditions of propeller loading and rotational speed currently favoured for good acoustic performance"--Abstract, page ii. Includes abstracts in English and French. Propellers Models. Destroyers (Warships) Displacement (Ships) Hélices Modèles réduits. Destroyers. Déplacement (Navires) Defence Research Establishment Atlantic, issuing body. D.R.E.A. technical memorandum ; 85/213. (CaOODSP)9.941838 PDF 1.07 MB https://publications.gc.ca/collections/collection_2024/rddc-drdc/D68-21-11-1985-eng.pdf