Lifa Inshore Five-Blade Propeller: A Must-Have Fuel-Saving Solution For Small And Medium Vessel Owners

This five-blade propeller is an exclusive Lifa design tailored for inshore small and medium-sized vessels, with a clear scenario distinction from the wide-chord skewed version for offshore voyages.

Its blade profile features a balanced design of medium chord length and moderately raked arc, without the significant skew of the offshore model and abandoning the sharp shape of traditional narrow blades. This design is precisely adapted to the medium and low speed operating conditions of inshore fishing boats and small cargo ships. The bending angle of the blades fits the water flow trajectory, which can significantly reduce the slip rate and cut down the ineffective power loss caused by eddies and cavitation.

In sea trials on 30-meter trawlers, this propeller has achieved 5%-20% fuel savings. Taking a fishing boat with a daily fuel consumption of 200 liters as an example, the annual fuel cost per vessel can be reduced by 100,000 to 150,000 RMB based on the current diesel price. For small and medium vessel owners with limited profit margins, this translates to tangible revenue growth.

The dense handwritten marks on the blade surface are direct evidence of the engineers' millimeter-level calibration. From the initial data of CFD fluid simulation to the surface compensation in CNC machining, and then to the detailed adjustment in manual grinding, every set of numbers is targeted at the core goal of fuel saving.

Compared with the offshore wide-chord version, this inshore propeller does not pursue cavitation resistance at high speeds, but focuses on propulsion efficiency in the medium and low speed range. The medium chord length ensures stable power transmission under full load conditions, and the moderately raked arc reduces the splashing resistance when the blades exit the water. Every design detail is dedicated to cutting the operating costs for small and medium vessel owners.