Vane area measuring device

A turbine nozzle throat area measurement apparatus for determining nozzle vane throat flow area of a vane having an airfoil surface, inner and outer bands and radial plane reference surfaces, a side circumferential position reference surface and a vertical height reference hole comprising:

• a movable gage carriage having spaced locating surfaces engageable with the radial plane reference surfaces for mounting a turbine vane in a radial plane corresponding to an engine support annulus, a second locating surface on the carriage to locate the side reference surface of the vane at a position corresponding to that within the engine support annulus, a pin on the carriage to define an index for the hole to locate the vane in a vertical radial position within the engine support annulus, means for locking the turbine vane in contact with the locating surfaces and in contact with the pin, a latch plate interlocking with said carriage to hold the carriage in a vertical height measuring position, a pair of relatively movable jaws with indicator points thereon located within the inner and outer bands of the mounted turbine vane, means to bias the jaws apart to cause the indicator points thereon to be maintained against the inner and outer bands of vane, said opposed jaws having relatively movable platforms thereon with exposed surfaces normally aligned with one another to indicate a desired vane height datum between the inner and outer bands thereof, and means for measuring misalignment of the exposed surfaces to indicate a height variance from a desired vertical height datum between the inner and outer bands, said latch plate being released out of interlocking relationship with said carriage, means for shifting said released carriage with respect to said movable jaws to locate the carriage and vane in a throat width measuring position, first and second throat registers engageable with the airfoil surface of said vane when said carriage is in the throat width measuring position, one of said registers having two relatively movable exposed outer surfaces thereon positioned with respect to one another when the carriage is in its throat width measurement position and means on one of said last mentioned exposed surfaces including means for indicating the throat width variation from a desired nominal throat width dimension whereby direct vane height and throat width variations can be determined prior to assembly of the vane in a ring of nozzle vanes in a gas turbine engine gas flow system.