eng Science and Education Publishing American Journal of Mechanical Engineering 2328-4110 2017-08-07 5 4 161 166 10.12691/ajme-5-4-8 AJME2017548 article Abdollah Sakaki 1 Hassan Ghassemi gasemi@aut.ac.ir 1 Koorosh Aslansefat 2 Mohsen Sadeghian 2 Department of Maritime Engineering, Amirkabir University of Technology, Tehran, Iran Department of Electrical Engineering, Universidade Nova de Lisboa, Lisbon, Portugal The control surface is an effective apparatus for improving the performance of planing boats and is considered an important element in the design of planing boats. Trim-tabs are placed at the transom to give better trim angle in order to diminish the resistance. In this paper, algorithm genetic (GA) is applied to find the trim, resistance and dearrise angle using Savitsky's formulas. The input data are all boat dimensions, including trim-tab data. The output results are trim angle, longitudinal center of gravity (lcg) and deadrise angle (β) and minimum resistance. http://pubs.sciepub.com/ajme/5/4/8/ajme-5-4-8.pdf control surface trim-tab drag force genetic algorithm