An adjustable bolted propeller, like the one pictured above for Britain’s new QE-class aircraft carrier, feature fixed-pitch blades which are installed on the hub after machining, as compared to the entire propeller being machined at once. This enables the pitch of the blades to be increased or decreased during yard periods should variations in hull resistance warrant such a change.
Rolls-Royce notes, “In comparison to conventional monobloc fixed pitch propellers the ABP has higher quality blade machining and reduced overall weight, which give easier shipment, handling and mounting.”
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April 4, 2024
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