Controllable-Pitch Propeller (CPP) · Shaft Line & Propulsion
A 6.5 m diameter, four‑blade controllable‑pitch propeller made of nickel‑aluminium bronze, designed to provide variable thrust and rapid reversal without changing shaft rotation. As a Controllable-Pitch Propeller (CPP), it is normally installed at the aft end of the propulsion shaft with a hub containing the mechanism that rotates the propeller blades about their own axes. In that role, its primary purpose is to vary thrust and reverse thrust direction without necessarily reversing shaft rotation. Compared with an FPP, a CPP adds blade bearings, a pitch-control mechanism and hydraulic or mechanical actuation, which introduces additional sealing and control maintenance. For exact ratings, dimensions, settings, capacities, materials and variant-specific limits, refer to the manufacturer documentation for the exact figure.
What our service work and the manufacturer documentation say about keeping this model running.
Inspect blades, hub, seals, hydraulic-oil condition, pitch feedback and accessible control equipment. Trend pitch response, oil leakage and any hub-oil contamination. Check blade roots and sealing areas carefully during docking. Refer to the manufacturer and class documentation for the exact figure for blade-bearing clearance, pitch limits and seal criteria.
Carry hub seal kits, hydraulic filters, control-valve and feedback-sensor spares, approved hydraulic oil and manufacturer-specified pitch-control service parts.
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