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A Study on the Effects of Weight and Center of Gravity of a Planing Craft on Running Attitude

활주선의 하중 및 무게 중심 위치 변화가 항주 자세에 미치는 영향에 대한 연구

  • Published : 2009.06.20

Abstract

Motion characteristics of a planing craft are sensitively changed according to its weight and longitudinal center of gravity. In this paper, planing craft model tests were performed in calm water for various test conditions and Froude numbers. Sinkage and trim were measured to analyze the relations between the attitudes of a planing craft and the weight and center of gravity of it. Theoretical formula for the prediction of the attitudes of a prismatic planing hull was modified so that it can be applied to the prediction of the attitudes of a non-prismatic planing hull, and the calculation results by the modified formula were in good agreements with the experimental data.

Keywords

Planing craft;High-speed towing test;Weight and Center of Gravity;Running attitude

References

  1. Kim, D.J., Rhee, K.P. and You, Y.J., 2008, 'An Experimental Study on the Motion of a Planing Craft with respect to Design Parameters in Still Water and Waves,' Proceedings of the Annual Autumn Meeting of the Society of Naval Architects of Korea, pp. 59-66
  2. Baek, K.H., 1986, An analysis of the Stability and the Motion Responses of a Planing Craft, M.D. Thesis, Seoul National University
  3. Brown, P.W., 1971, An Experimental and Theoretical Study of Planing Surfaces with Trim Flaps, Davidson Laboratory Report 1463, Stevens Institute of Technology
  4. Martin, M., 1976, Theoretical Determination of Porpoising Instability of High-Speed Planing Boats, DTNSRDC Report 76-0068
  5. Savitsky, D., 1964, 'Hydrodynamic Design of Planing Hulls,' Marine Technology, Vol.1, No.1
  6. Shuford, C.L., 1957, 'A Theoretical and Experimental Study of Planing Surfaces Including Effects of Cross Section and Plan Form,' NACA Report 820
  7. Yeo, D.J., Lee, H.J. and Kang, C.G., 2007, 'Estimation of WIG's Take-off State Based on Planing Theory,' Journal of the Society of Naval Architects of Korea, Vol. 44, No. 5, pp. 534-541 https://doi.org/10.3744/SNAK.2007.44.5.534
  8. Shin, J.I., Yang, J.M., Park, H.W., Kim, J.S. and Kim H.C., 2005, 'A Study on the Resistance Characteristics of a Stepped Planing Hull Using a High-Speed Towing System,' Journal of the Society of Naval Architects of Korea, Vol. 42, No. 4, pp. 341-349 https://doi.org/10.3744/SNAK.2005.42.4.341

Cited by

  1. Comparative Study on the Motion Responses for a 40ft Class Cruise Leisure Boat vol.50, pp.4, 2013, https://doi.org/10.3744/SNAK.2013.50.4.240
  2. A Model Test Study on the Effect of the Stern Interceptor for the Reduction of the Resistance and Trim Angle for Wave-piercing Hulls vol.52, pp.6, 2015, https://doi.org/10.3744/SNAK.2015.52.6.485