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1- x 3-Foot Supersonic Tunnel No. 2

Since they used interchangeable test sections, both 1 x 3-foot supersonic tunnels employed the sting arrangement shown here. Note that the strut is attached to dual rings around the observation windows that rotate, turned by a worm-gear drive, to set the desired pitch.

 

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Credit: NASA

Image Number: A-21506

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Uploaded on August 1, 2013
Taken on August 1, 2013