1.1.3 DRAWING 75-WAGL_4400_3_1_-_L.pdf

This is a USCG technical drawing for a propeller component designated for use with the 1312 MGE suit. The document is composed of four pages containing detailed engineering specifications, dimensional data, and manufacturing requirements for a right-hand propeller (STD) design.

The propeller specifications include a nominal pitch of 0.7 inches, diameter of 4.8 inches, and four blades with a weight range of 412-430 lbs including the hub. The design incorporates ABS certification requirements with an ice class BO rating and is capable of 1000 maximum engine output at 2100 RPM. Key performance characteristics include an inertia (WR²) in air of 17.19 lb-ft² and nominal expanded blade area of 9.328 ft². The drawing provides comprehensive dimensional tolerances, balance specifications, material removal procedures, and inspection requirements. Materials specified include nickel-aluminum bronze (Type A) for blade construction. Critical tolerances include pitch variation not exceeding ±1.5 percent per individual blade radius, blade thickness accuracy within ±1.25 inches, and blade section accuracy within ±1.0 inch maximum. The document includes a detailed table of offsets for blade sections at various radii (0.2 to 0.9 ratio) with corresponding width and thickness measurements. Installation requirements specify that damage to propeller blade edges and tips must be avoided, preservation coatings must be removed prior to final installation, and the propeller bore and shaft taper surfaces must remain clean and dry. This drawing supersedes previous USCG drawings 75-WAGL-4400-1 and 75-WAGL-4400-2, and is maintained by the USCG Office of Naval Engineering in Washington, D.C.