Fixed-Pitch Propeller · Shaft Line & Propulsion
A 3.5 m diameter, four‑blade fixed‑pitch propeller made of nickel‑aluminium bronze (NiAlBz) by Mecklenburger Metallguss, designed for low‑speed marine diesel engines operating around 110 rpm. As a Fixed-Pitch Propeller, it is normally installed at the aft end of the propulsion shaft outside the hull, directly converting shaft torque into propulsive thrust. In that role, its primary purpose is to provide forward or astern thrust with a blade pitch that is fixed by the propeller geometry. Unlike a controllable-pitch propeller, an FPP has no internal pitch-changing mechanism, so thrust reversal normally depends on reversing shaft rotation or another propulsion arrangement. For exact ratings, dimensions, settings, capacities, materials and variant-specific limits, refer to the manufacturer documentation for the exact figure.
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What our service work and the manufacturer documentation say about keeping this model running.
Inspect blades, leading and trailing edges, hub, root areas and attachment to the shaft whenever the propeller is accessible. Check for cavitation, impact marks, cracks, corrosion and evidence of movement at the shaft connection. After repair, verify geometry and balance using an approved propeller procedure. Refer to the manufacturer and class documentation for the exact figure for blade damage, pitch and repair limits.
Onboard spares are normally limited to shaft-hub sealing or fastening items; major blade or propeller replacement components are generally planned as shore or dry-dock spares.
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