MODEL EXPERIMENTS WITH 31 M TRAWL AND COMPARISON WITH FIELD TRIALS


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Authors

  • M C Perumal Central Institute of Fisheries Operatives, Cochin
  • M Mukundan Central Institute of Fisheries Operatives, Cochin
  • R Rajendran Central Institute of Fisheries Operatives, Cochin

Abstract

A model of a 31 m two-seam trawl was tested in a towing tank. The horizontal
and vertical openings and warp tension were measured at various speeds. Observations
at speeds varying from 0.24 to 0.41Sm/sec indicated that the tension and horizontal
spread increase with increasing speed, whereas the vertical opening showed a decrease.
At the designed speed of 0.37S m/sec, lOS.S cm and ll.S cm were the horizontal and
vertical openings respectivdy and the tension was 61S gm. The values were predicted
for the full-scale net and were compared with the field observations. In the case of
h<»:izontal and vertical openings, the predicted and observed values were the same
whereas the predicted tension was higher than the measured value. The observed plan
shape of the head-line was proved to be a catenary with linear extensions

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Author Biographies

  • M C Perumal, Central Institute of Fisheries Operatives, Cochin
    Central Institute of Fisheries Operatives, Cochin
  • M Mukundan, Central Institute of Fisheries Operatives, Cochin
    Central Institute of Fisheries Operatives, Cochin
  • R Rajendran, Central Institute of Fisheries Operatives, Cochin
    Central Institute of Fisheries Operatives, Cochin

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Issue

Vol. 20 No. 1 (1973)

Section

Articles

License

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How to Cite

Perumal, M. C., Mukundan, M., & Rajendran, R. (2011). MODEL EXPERIMENTS WITH 31 M TRAWL AND COMPARISON WITH FIELD TRIALS. Indian Journal of Fisheries, 20(1), 1-15. https://epubs.icar.org.in/index.php/IJF/article/view/12349