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Abstract
The angle of the propeller shaft is an important factor that affects the speed of fishing boats. This study assesses how the propeller shaft inclination angle impacts the speed of composite fishing boats through experimental modeling. The model used for testing is a scaled-down version of a 24.0 m × 6.5 m × 3.5 m fishing boat, constructed at a 1:12 scale using composite materials (polyester resin and fiberglass). The model allows for adjustment of the propeller shaft angle from 0 to 15 degrees. The experimental results indicate that the boat's speed varied significantly with changes in the propeller shaft angle. The highest speed, reaching up to 3.05 kn/h, was achieved with a propeller shaft inclination angle between 6 and 7 degrees, while the speed decreased sharply when the angle increased beyond 9 degrees up to 15 degrees.
Keywords: Composite fishing boat; ship model; propeller shaft inclination angle; speed.