618-WMEC_245_51_1_-_D.pdf

This is a technical reference plan drawing for a naval propeller blade with right-hand rotation, specifically a 63/4 configuration. The document is a detailed engineering schematic produced by the Naval Engineering Division that depicts cross-sectional views and dimensional specifications for a propeller blade design.

The drawing shows multiple sectional views (labeled A through H) with precise measurements in inches, pitch angles, and blade thickness specifications across the radial stations. The plan includes pitch angle variations, trailing edge configurations, leading edge geometry, and blade chord dimensions at different spanwise locations. The reference plans drawing supersedes ETMPC-440-54 & 58, and includes multiple revision notes documenting corrected entry data in blade section table coordinates, added approximate block information, revised general notes on blade geometry, added tolerance specifications for blade contact surfaces, and revised undocumented chord dimensions. The drawing contains a revision table in the upper right corner tracking changes with corresponding dates in 1977-1978, and a component revision table at the bottom listing specific modifications to blade specifications. This is a technical specification document used for manufacturing, inspection, and quality control of naval propeller blades rather than a procurement solicitation.