NASA NTRS · 19900000186
Borescope Device Takes Impressions In Ducts
Abstract
Maneuverable device built around borescope equipped to make impression molds of welded joints in interior surfaces of ducts. Molds then examined to determine degress of mismatch in welds. Inserted in duct, and color-coded handles on ends of cables used to articulate head to maneuver around corners. Use of device fairly easy and requires little training.
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Walter, Richard F., Turner, Laura J.. 1990-04-01. Borescope Device Takes Impressions In Ducts. https://ntrs.nasa.gov/citations/19900000186
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