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An analytical investigation of airplane spin-recovery motion by use of rotary-balance aerodynamic data

Description: From Introduction: "Many investigations have been made in the Langley 20-foot free-spinning tunnel in which the natures of airplane spins and recoveries have been determined experimentally with dynamically scaled-down models. The results of some of these investigations are presented in references 1 to 5."
Date: June 1954
Creator: Scher, Stanley H.
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[Announcement About the Turning Point Suffragist Memorial]

Description: Announcement about the installation of the Turning Point Suffragist Memorial which will incorporate a historic section of the White House fence. It includes historical context about the fencing and information about the memorial.
Date: June 22, 2020
Duration: 3 minutes 18 seconds
Creator: United States. Women's Suffrage Centennial Commission.
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