NORSHIPCO Y-2274-1 Rudders.pdf

This document is a technical drawing for dredge yaquina rudders, prepared by the U.S. Army Engineer District, Portland, Oregon, Corps of Engineers. The drawings provide comprehensive specifications for rudder design and construction, including detailed dimensions, materials, assembly instructions, and component details across multiple sheets.

The rudders are fabricated from steel (30 lb ABS or ASTM A36) and must comply with American Bureau of Shipping (ABS) standards and welding requirements per AWS specifications. Key specifications include rudder half breadths with dimensions ranging approximately 7'0" in width and 8'3" in height, with various stations equally spaced. The drawings detail multiple components including the rudder stock, post connections, pintle and gudgeon assemblies, half couplings, and trailing edge construction. Material requirements specify that all welding must conform to AWS standards, rudder components must be watertight, and the rudder shaft must be determined by comprehensive analysis. The document includes general notes requiring two rudders with pegs steel side details, special notes regarding mate lines, and reservations for machining rudders in way of pintle and rudder post openings. Specific construction details are provided for sections, assemblies, and individual components with scales ranging from 1'-0" to 3'-10", ensuring precise fabrication of this marine equipment for the dredge vessel.