Hydrodynamic characteristics of vertical V type otter board.

Abstract

The hydrodynamic characteristics of a vertical V type otter board, which has been widely used recently by Japanese trawlers, were studied using a model with a dihedral angle and a sweepback angle. The model with 309c u wing area and 14.1% camber ratio were rigged for an attack angle ranging from -5 to 90. The lift, drag and moment were measured by a *1