I've been sent a copy of this paper http://www.jps.auckland.ac.nz/docs/Volu ... 3_1_01.pdf by ANNE DI PIAZZA
(Aix-Marseille Université, Centre National de la Recherche Scientifique), ERIK PEARTHREE and FRANÇOIS PAILLÉ (Ecole Nationale Supérieure de Mécanique et d’Aérotechnique) published originally in the Journal of the Polynesian Society 123(1): 9-28
To understand the sailing performance of traditional canoes in Oceania, we replicated ten sail rigs and tested them in a wind tunnel. Measurements of lift and drag forces demonstrate substantial differences in their performance. At low heading angles, from about 30° to 80° off the wind, three sails (Massim, Ninigo, Santa Cruz) are remarkable for their higher efficiency. Three other sails (Tonga, Hawaii, Tahiti) are remarkable for their lower efficiency from heading angles of about 90 to 130°. In between, four more sails (Arawe, Micronesia, Vanuatu, Marquesas) have roughly similar performance to each other. The ranking of these sails is followed by a description of their distribution with inferences on historical evolution of canoe rigs.
Makes interesting reading
Sails soft & hard (wingsails), kites, and discussions of aerodynamic theory
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