The USS Monitor, designed by inventor John Ericsson, was recovered by NOAA in 1998, conserved over the next eight years, and is now on display at The Mariners' Museum in Newport News, Virginia, where it was scanned in place. This presentation and the technical paper describes the scanning and processing of data for the recovered propeller. Two different measurement technologies were employed to meet the goal of high accuracy and high resolution. A coherent laser radar system was used to scan the overall propeller at millimeter resolutions for documenting overall size; a structured white light scanner was employed to scan at micron resolutions to capture details such as surface cracks and graffiti etched on the blades. The scanned point clouds were then merged to generate an accurate model for dimensional and hydrodynamic analysis. This presentation provides detail and highlights of the scanning and data analysis activity.
Measuring John Ericsson's USS Monitor Propeller to Micron Accuracies using Laser and White Light Scanning Techniques
Hand, Steven D., Schindelholz, Eric, Clark, James F., and William J. Mongon. "Measuring John Ericsson's USS Monitor Propeller to Micron Accuracies using Laser and White Light Scanning Techniques." Paper presented at the SNAME 11th Propeller and Shafting Symposium, Williamsburg, Virginia, USA, September 2006. doi: https://doi.org/10.5957/PSS-2006-16
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