Abstract: Apparatus for measuring the flow area of a nozzle assembly is particularly applicable to structures such as jet engine nozzle assemblies or guide vane assemblies wherein a plurality of vanes or airfoil elements are supported in radially spaced apart relation, the apparatus including air moving means for supplying air through a first chamber, a second chamber, an air valve intermediate the chambers and the nozzle assembly. Measuring means are connected to each chamber to measure the respective air pressures. The apparatus can also include means for adjusting the size of the air valve opening between the two chambers as well as additional readout elements for facilitating the rapid and accurate measuring of the flow area of the nozzle assembly.

Abstract: Apparatus for simultaneously gauging and aligning movable elements to a preselected standard is particularly applicable to structures such as guide vane assemblies wherein a plurality of vanes or airfoil elements are supported in radially spaced apart relation by suitable flange means, the apparatus including jaws movable by motor means for aligning both the trailing and leading edges of individual vanes, a monitoring means being incorporated within the jaws to sense initial alignment of the vane and signal the motor means through a suitable amplifier in order to realign the individual vane by means of the motor means and movable jaws. For the preferred application of gauging and bending airfoil elements, the apparatus also includes means for indexing each vane of an annular vane assembly in alignment with the jaw structure as well as additional control elements for facilitating the rapid and accurate gauging and alignment of the vane assembly.

Abstract: A classification gauge for classifying vane clusters to provide a known throat area including a plurality of airfoil-like elements, the gauge including a precision jig for positioning the vane cluster, movable probe means for determining the angular alignment of each airfoil element and linkage means for connecting the respective movable probes with a classifying dial.