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• Sikorsky HNS-1 (YR-4B)

  • Uploaded by: NASA on The Commons
  • License: No known copyright restrictions
  • 0 comments
  • 33 favorites
  • 63,990 views
  • Date taken: 1944-10-19 00:00:00
  • Date uploaded: 2016-08-10
  • Tags: sikorsky, hns1, yr4b, helicopter, fullscaletunnel, langley, naca
  • Visibility: public