Producing Geometry You Can Trust
QC provided an engineer for our project who did a great job of collecting the dimensional data for the parts to be reverse engineered, creating the CAD models, and producing prints for manufacturing. He kept in regular contact with me throughout the project, allowing us to quickly resolve issues as they arose. He was also very responsive when asked to make changes to the prints. Overall, a superior job.
- Paul,
Power Generation
Validating Airfoil Internal Features 
There are a number of ways to verify that manufactured internal geometries match your CAD model. An effective method is to use CT scanning to capture internal and external points, then doing a comparative analysis of the point cloud to the CAD. However, when the option is available, internal features can be laser scanned after sectioning the part. 
Whatever method is used, it is still best to get a thorough overall scan of the external and internal features either with a destructive or nondestructive method. In addition, it's often helpful to remove the outer features of the part for visual inspection of the most critical internal features. This also allows for additional checks to be performed with a CMM inspection or a vision system that captures dimensions with greater accuracy than a triangulation or CT scanner can produce. 
Careful sectioning and disassembly is critical to producing accurate results.
Performing each of these steps at least once increases the confidence that your parts match your model - inside and out.
