インドネシア・カヌーの船型と船体抵抗について

概要

論文の詳細を見る
Coastal fishing canoes with outriggers in both sides, locally called "londe" in North Sulawesi have a very long snout extended from the lower corner of stem which is slightly curved upward, and well resembles to an elephant tusk in shape. A series of resistance tests on three models; two londes with or without the snout and a dugout canoe with no outrigger of Kendari in Southeast Sulawesi, was undertaken to prove respective contributions of the hull body itself, outriggers and snout. Conclusions of the tank tests are the following: 1) The snout hardly contributes to the resistance. It however has an effect to restrain trim changes by the head at a range of high speed of 1.4 of Fn∇ or more. 2) The total resistance coefficient, 05γT of outriggers is estimated as 0.01 between 0.4 and 1.5 of Fn∇, from resistance differences among three outrigger conditions; a londe model with outriggers on one side, one on both sides, and another without an outrigger. 3) The resistance of londes which have very slim bodies, is greatly small as about 1/2 of Japanese coastal fishing boats, called Wasen [Takayama, 1988].
社団法人日本航海学会の論文
1989-03-20