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Ghassemi H. Ghiasi M., A combined method for the hydrodynamic characteristics of planing craft, Ocean Eng, 35 (3), 2008, 310-322.

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Article

Obtaining the Practical Formula for the Trim-tab Dimensions to Reach the Minimum Drag for Planing Boat

1Department of Maritime Engineering, Amirkabir University of Technology, Tehran, Iran


American Journal of Mechanical Engineering. 2020, Vol. 8 No. 4, 163-171
DOI: 10.12691/ajme-8-4-3
Copyright © 2020 Science and Education Publishing

Cite this paper:
Matin Mohebbi, Mohammad A. Ghassemi, Hassan Ghassemi. Obtaining the Practical Formula for the Trim-tab Dimensions to Reach the Minimum Drag for Planing Boat. American Journal of Mechanical Engineering. 2020; 8(4):163-171. doi: 10.12691/ajme-8-4-3.

Correspondence to: Matin  Mohebbi, Department of Maritime Engineering, Amirkabir University of Technology, Tehran, Iran. Email: matinmoheby@yahoo.com

Abstract

Trim-tab is a device for controlling and stabilizing planing boats in different sea conditions. This paper presents to find dimensions of the trim-tab at various speeds of the boat to reach the minimum drag. The speed of the boat is from15 m/s to 30m/s. Drag of the boat is calculated by Stavisky’s method. The minimum drag is found based on the optimum the trim angle. A Matlab program code is prepared for these calculations and all the all results such as drag, dimensions of the trim-tab, longitudinal center of pressure and time angle at different speeds of the boat are presented and discussed.

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