BOW GAUGE FOR TURBINE ENGINE VANES

摘要

A measuring instrument for determining variations in the bow of a turbine engine vane adjacent to its trailing edge. A dial gauge is slidably mounted on the instrument and has an operating stem whose contact wheel perpendicularly engages the top surface of the trailing edge section of the vane. The contact wheel is adapted to move along a straight line which theoretically lies in the flat tangent plane of the vane airfoil at its trailing edge. The actual vane surface is bowed from this theoretical line and the dial gauge will accordingly indicate variations in the vane bow, above and below this tangent plane.