Analysis of Performance Losses Related to Shaft Angle on Fishing Boats Using the Free Running Model Test Method

Several traditional fishing boats in Sendang Biru, Malang Regency are of the sekoci type using an inboard engine drive system with position propeller shaft installed at angle to ship's base line. Based on theory can reduce performance ship propulsion up (2-3)%. In this research, we analyzed how much was lost/decreased lifeboat above. The method use is Free Running Model Test by making a model boat size Loa = 100 cm, Lwl 80.72 B 19.7 H 10.68 cm and T 5, 08 made aluminum sheet. uses 1 motor which has thrust 60 watts, remote control equipment main component NRF24L01 transceiver works frequency 2.4 Ghz range 240 meters kilometer conditions without obstacles camera drone record track. results study show that there decrease/loss 3-degree 0.24%, 5-d. gree 0.49%, 10-degree 2.52%, 15-degree 4.41% 20 degrees 6.48%.