Abstract: A tubeaxial fan (10) broadly including a cylinder (12), a propeller (14) rotatably supported in the cylinder (12), and a drive assembly (16) operable to rotate the propeller (14) is disclosed. The propeller (14) includes blades (28,30,32,34,36,38) each having an inventive blade design. The inventive blade design presents a chord length (C), a stagger angle (?e), and a camber height (?c) that vary along each of the blades as shown in TABLE 1. The inventive blade design presents an external surface of each of the blades having a shape defined by the relative positioning of a plurality of coordinates contained in at least nine cross-sections (e.g., the blade (28) includes cross-sections (44,46,48,50,52,54,56,58,60)). The cross-sections (44,46,48,50,52,54,56,58,60) of the illustrated blade (28) have the corresponding plurality of coordinates listed in TABLE 2.

Abstract: A tubeaxial fan (10) broadly including a cylinder (12), a propeller (14) rotatably supported in the cylinder (12), and a drive assembly (16) operable to rotate the propeller (14) is disclosed. The propeller (14) includes blades (28,30,32,34,36,38) each having an inventive blade design. The inventive blade design presents a chord length (C), a stagger angle (&bgr;e), and a camber height (&dgr;c) that vary along each of the blades as shown in TABLE 1. The inventive blade design presents an external surface of each of the blades having a shape defined by the relative positioning of a plurality of coordinates contained in at least nine cross-sections (e.g., the blade (28) includes cross-sections (44,46,48,50,52,54,56,58,60)). The cross-sections (44,46,48,50,52,54,56,58,60) of the illustrated blade (28) have the corresponding plurality of coordinates listed in TABLE 2.

Abstract: A tubeaxial fan (10) broadly including a cylinder (12), a propeller (14) rotatably supported in the cylinder (12), and a drive assembly (16) operable to rotate the propeller (14) is disclosed. The propeller (14) includes blades (28, 30, 32, 34, 36, 38) each having an inventive blade design. The inventive blade design presents a chord length (C), a stagger angle (&bgr;e) and a camber height (&dgr;c) that vary along each of the blades as shown in TABLE 1. The inventive blade design presents an external surface of each of the blades having a shape defined by the relative positioning of a plurality of coordinates contained in at least nine cross-sections (e.g., the blade (28) includes cross-sections (44, 46, 48, 50, 52, 54, 56, 58, 60)). The cross-sections (44, 46, 48, 50, 52, 54, 56, 58, 60) of the illustrated blade (28) have the corresponding plurality of coordinates listed in TABLE 2.

Abstract: A pressure independent variable air volume valve (VAV valve) functions as a pressure dependent valve upon detecting a malfunctioning airflow indicator. Under normal operating conditions, the VAV valve modulates supply airflow to a comfort zone in response to the zone temperature and the rate of airflow through the valve. If the airflow indicator fails, the VAV valve modulates the supply airflow in response to the zone temperature, independent of the airflow indicator.

Abstract: A vane axial flow fan is shown having a shroud construction which provides greater than normal rigidity in the areas co-extensive with the stator vanes and fan wheel blades. Further, a novel method of constructing an axial flow fan is disclosed wherein the stator vanes are first mounted on an expandable split ring which is then placed within an annular stator housing. The split ring is then expanded to reduce stator vane end clearance prior to being permanently secured in place by welding.