Article citationsMore >>

Savitsky, D., (1964). Hydrodynamic design of planing hulls. Marine Technol, 32(3): 78-88.

has been cited by the following article:

Article

Hydrodynamic Characterisation and Structural Design Analyses of an Airboat

1Department of Marine Engineering, Rivers State University, Port Harcourt, Nigeria

2Department of Marine/ Mechanical Engineering, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria

3Department of Marine Engineering, Rivers State University, Port Harcourt, Nigeria;Energy Mechanics Resource Center, Korea Institute of Science and Technology, Seoul, Korea


American Journal of Mechanical Engineering. 2017, Vol. 5 No. 5, 199-204
DOI: 10.12691/ajme-5-5-2
Copyright © 2017 Science and Education Publishing

Cite this paper:
Ibelema Faango Keribo, Daniel Tamunodukobipi. Hydrodynamic Characterisation and Structural Design Analyses of an Airboat. American Journal of Mechanical Engineering. 2017; 5(5):199-204. doi: 10.12691/ajme-5-5-2.

Correspondence to: Ibelema  Faango Keribo, Department of Marine Engineering, Rivers State University, Port Harcourt, Nigeria. Email: ibkeribo@yahoo.com

Abstract

This paper presents the structural design and hydromechanics performance characterization of a prototype airboat of length= 2.42m, beam= 1.11m, draught= 0.32m, and powering =30 kW. Modified Savitsky’s model and test-data are utilized for the analysis. The results show that the hull-trim increases from static trim to a peak value of 5.2° at Fn =2.50 in the non-planing speed regime; and then decreases to a plateau in the planing-speed regime. This phenomenon is explained by the aftward drift of the point of action of the resultant lift force towards the centre of gravity. For higher Froude number, bottom-velocity ratio increases towards unity: i.e. a reduced wake effect. Resistance curve for airboat is “Ogive” shape, rather than parabolic; whereas the effective power is parabolic. Correlation of analysis and test data shows a good agreement, except at transition speed. Therefore, the analysis is valid for characterizing airboats parameters.

Keywords