Axial turbine is a very unique turbine, that has been used by water plantation (PLTA) in Indonesia, which can be found as many as 162 units of the water plantation per 2021. Axial turbine usually uses natural energy from water flowing, especially waterfall. The energy that is extracted from the waterfall is the potential energy of the water flowing down. Those energy is the source of power for this turbine to rotate, and through the rotating shaft, mechanical energy will be formed. In this paper, the output of an axial turbine will be analyzed, and the main variable for analyzing will be pressure drop towards the mechanical energy created by axial turbine on a lab scale. Tests will be carried out on a laboratory at Universitas Tarumanagara (UNTAR) for data to analyze.

Keywords : Natural Energy, Mechanical energy, Pressure Drop.