USA As Represented by Secretary of the Navy

Craig S LaMoy

Charles K Atwell

Michael A Pompeii

Thomas W Van Doren

W Dale Craig

Bradley A Repp

Dale W Sisson, Jr

Marh A Huebner

Dallas Wayne Culbertson

Nicholas L Tzortzinis

John C Larzelere

Disclosed is an air supply system that provides filtered ventilation to a protected zone which is maintained at a positive pressure so as to prevent contaminants from infiltrating therein. The system further discloses a three-stage air filter apparatus that provides all the necessary filtering to remove contaminants from the air that may be created by chemical, biological and radiological conditions.

Air supply system particularly suited to remove contaminants created by chemical, biological or radiological conditions

A one-piece fan rotor optimized for construction and safety performance criteria is provided. The rotor has a hub with a radial cross-section defined by an I-beam. A plurality of unequally-spaced rotor blades are disposed circumferentially around and extend radially outward from the hub. Each rotor blade has a root portion coupled to the hub with the root portion defined by a concave fillet circumventing the rotor blade. For rotational balance, at least one of the forward side and backside of the hub incorporates an axially extending pad. Methods are provided for controlling stress on the rotor and for balancing the rotor.

Fan rotor with construction and safety performance optimization

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King George, VA, United States of America

Craig S LaMoy