Image: Variable Density Tunnel (9423922276)
Size of this preview: 697 × 600 pixels. Other resolutions: 279 × 240 pixels | 2,971 × 2,557 pixels.
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Description: (L-2929): These section drawings show the VDT with closed (top) and open (bottom) test sections. It was built with a closed test section. The open test section installed after the 1927 fire proved to be unsuccessful, and the original design was replicated in 1930.
Title: Variable Density Tunnel (9423922276)
Credit: Variable Density Tunnel
Author: NASA on The Commons
Permission: NASA on The Commons @ Flickr Commons
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