What are the advantages of a twisted leading edge?

19 January 2023

A twisted (asymmetrical) profile is a unique design of the leading edge of a rudder. The leading edge is aligned to the propeller slipstream, accounting for varying inflow angles. Numerical simulations and tank tests have shown savings up to 3,5%, depending on the configuration.

This technology has multiple advantages, such as are creating smooth water inflow, optimising the lift-drag ratio and reducing cavitation risk of the propeller. A twisted leading edge recovers a part of the rotational losses in the wake of the propeller, therefore improving propulsion efficiency.

This feature is especially suitable for sea-going vessels with a high propeller load (above 20 knots) such as bulk carriers, container ships, chemical tankers and cruise ships.