The Variable Density Tunnel was a wind tunnel at NASA's Langley Research Center. It is a National Historic Landmark. It was the world's first variable density wind tunnel that allowed accurate testing with small-scale models. It was actively used as a wind tunnel from the early 1920s until the 1940s.
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Famous quotes containing the words variable and/or tunnel:
“There is not so variable a thing in nature as a lady’s head-dress.”
—Joseph Addison (1672–1719)
“The only way to find out anything about what kinds of lives people led in any given period is to tunnel into their records and to let them speak for themselves.”
—John Dos Passos (1896–1970)