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F-22 measures up

EXTREMELY TIGHT dimensional tolerances on the external lines of the Lockheed Martin/Boeing F-22, to meet stealth and aerodynamic design goals, have led Lockheed Martin to develop new inspection techniques, including this step-gap measurement tool. Seen being demonstrated in measuring the gap around the forward avionics-bay door of the YF-22 prototype, the portable optical system produces a printed plot of gap width and depth. an

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