Abstract: An angle of attack sensor includes a housing having an open end and a closed end, a faceplate positioned on the open end of the housing, the faceplate comprising a periphery at an outer edge of the faceplate, a central opening, and an exterior surface extending from the periphery to the central opening, and a vane assembly extending through the central opening of the faceplate. The exterior surface of the faceplate has a sloped profile from the periphery to the central opening.

Abstract: An angle of attack sensor includes a housing having an open end and a closed end, a faceplate positioned on the open end of the housing, the faceplate comprising a periphery at an outer edge of the faceplate, a central opening, and an exterior surface extending from the periphery to the central opening, and a vane assembly extending through the central opening of the faceplate. The exterior surface of the faceplate has a sloped profile from the periphery to the central opening.

Abstract: In one example, an apparatus for holding a display device includes a back plate and a plurality of engaging members disposed around a periphery of the back plate. The back plate includes a rear face and a front face opposite the rear face. The plurality of engaging members extend from the back plate in a direction from the rear face to the front face to define an outer boundary of a retention space configured to accept the display device. The plurality of engaging members includes a rotatable engaging member configured to rotate between an engagement position and a disengagement position. The engagement position is configured to secure the display device within the retention space. The disengagement position is configured to allow removal of the display device from the retention space.

Abstract: A camera adjustment mechanism allows a user to adjust the orientation of a surveillance camera. The camera adjustment mechanism includes a first portion and a second portion. The first portion includes a first end, a second end, and a first wall that extends between and connects the first end and the second end. The first wall is sloped such that an inner diameter of the first end is greater than an inner diameter of the second end. The second portion includes a third end connected to the second end, a fourth end, a second wall extending between and connecting the third end and the fourth end, and a plurality of engagement openings extending circumferentially about the fourth end.

Abstract: In one example, an apparatus for holding a display device includes a back plate and a plurality of engaging members disposed around a periphery of the back plate. The back plate includes a rear face and a front face opposite the rear face. The plurality of engaging members extend from the back plate in a direction from the rear face to the front face to define an outer boundary of a retention space configured to accept the display device. The plurality of engaging members includes a rotatable engaging member configured to rotate between an engagement position and a disengagement position. The engagement position is configured to secure the display device within the retention space. The disengagement position is configured to allow removal of the display device from the retention space.

Abstract: A method of making fertilizer comprising the steps of mixing an aqueous solution of sulfuric acid with diammonium phosphate in a weight ratio of diammonium phosphate to sulfuric acid from about 3 to about 5, and mixing the resulting reaction products with urea in a weight ratio of urea to sulfuric acid from about 7 to about 10. The resulting fertilizer has low corrosion properties and has a salt-out temperature below about 0.degree. F.