Variable-pitch propeller (marine)

By varying the propeller blades to the optimal pitch, higher efficiency can be obtained, thus saving fuel.

A vessel with a VPP can accelerate faster from a standstill and can decelerate much more effectively, making stopping quicker and safer.

Also, an FPP is typically more efficient than a CPP for a single specific rotational speed and load condition.

In the mid-1970s, Uljanik Shipyard in Yugoslavia produced four VLCCs with CPPs – a tanker and three ore/oil carriers – each powered by two 20,000 bhp B & W diesel engines directly driving Kamewa variable-pitch propellers.

[citation needed] Current VPP designs can tolerate a maximum output of 44000 kW (60,000 hp).