S-type pitot tube field verification gauge and method of its use

A s-type pitot tube verification gauge comprising:

• a block containing a first, a second, a third, and a fourth measurement station;
• the first measurement station configured to gauge a first face-opening plane tolerance of a s-type pitot tube, the first face-opening plane tolerance being an angle α relative to a transverse axis of a first and a second leg of a s-type pitot tube, the first measurement station comprising:
• a first and a second recess spaced apart from one another and sharing a common centerline;
• the first and second recesses having a minimum width WL and including:
• an upper end;
• a flat planar lower end;
• and
• a tapered sidewall extending between the upper and lower ends at the angle α;
• wherein WL is equal to a predetermined standard outside leg diameter;
• the second measurement station configured to gauge a second face-opening plane tolerance of the s-type pitot tube, the second face-opening plane tolerance being an angle β relative to a longitudinal axis of the first and the second leg of the s-type pitot tube, the second measurement station comprising:
• a first and a second planar surface spaced apart from one another and sharing a common centerline, each said planar surface sloping toward one another at the angle β;
• and
• a leg guide located at an end of one of said planar surfaces and sharing the common centerline of said planar surfaces;
• the third measurement station configured to gauge a first leg alignment tolerance, the first leg alignment tolerance being a port end alignment tolerance Z, the third measurement station comprising:
• a recess including:
• a holding jig located along a centerline of the recess toward a first end of the recess;
• and
• an indicator line located perpendicular to the centerline toward a second end of the recess and spaced from the second end a distance equal to the port end alignment tolerance Z;
• wherein a width of the recess at the first end is at least equal to twice the predetermined standard outside leg diameter WL plus a predetermined standard inter-leg spacing S;
• and
• wherein a width of the recess at the second end is at least equal to a predetermined standard port-to-port distance;
• the fourth measurement station configured to gauge a second leg alignment tolerance, the second leg alignment tolerance being a longitudinal axis alignment tolerance W, the fourth measurement station comprising:
• a first and a second recess spaced apart from one another and sharing a common centerline, at least one of the first and second recesses of the fourth measurement station having a flat planar first end;
• wherein a height of each first and second recess of the first and second recesses of the fourth measurement station is equal to a predetermined standard distance D, where D is a predetermined standard port-to-port dimension plus ½ a predetermined standard inter-tube spacing S;
• and
• wherein a width of each first and second recess is at least equal to the predetermined standard outside leg diameter WL plus the longitudinal axis alignment tolerance W.