Net drag estimate of 18.0 m pelagic trawl calculated twine area in comparison to projected monotype values by model studies
Net drag estimate of 18.0 m pelagic trawl calculated twine area in comparison to projected monotype values by model studies
Date
2006
Authors
Vijayan, V.
Baiju, M.V.
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologis(India)
Abstract
Designing a trawl gear can effectively be accomplished by matching its size to the
available horsepower. A simple method of trawl gear estimation at the design stage, utilizing
the information available from a net drawing, will immensely ease the designing process
without having to wait for the experimental values of net drag. Drag estimation through
calculated twine area is attempted with 18.0m semi pelagic trawl and is compared with the
total drag of the projected prototype values by I/IS"1 model studies conducted at the ship
model testing tank at IIT, Chennai. Method of calculation of twine area in m2 of the different
webbings that go into the making of the gear is required to calculate the total twine resistance
to enable to optimise the designed net and to optimally utilize the available horse power.
Net drag estimation using calculated twine area and the total drag of the prototype arrived
at by model studies are calculated and compared.
Description
Keywords
net drag, semi pelagic trawl, twine area, model
Citation
Fish Technol. 43(1): 37-40