John Company

Project Sign Progress Report, 1948

DOW-UAP-D097 · War Dept. · document · 45 pages · Release 4

What the war.gov catalog says

This file contains an initial report from the Air Materiel Command regarding Project Sign. Project Sign was a 1948-1949 U.S. Air Force program to investigate the nature and origin of unidentified flying objects (UFO). The report details 100 UFO sightings from 1947-1948. The file also contains an article excerpted from “The Aeroplane,” an aviation-focused periodical magazine published between 1911 and 1968, titled “The Biology of the Flying Saucer.”

  1. page 1 of 45
  2. page 2 of 45
  3. page 3 of 45
  4. page 4 of 45
  5. page 5 of 45
  6. page 6 of 45
  7. page 7 of 45
  8. page 8 of 45
  9. page 9 of 45
Pages 10 to 45
  1. page 10 of 45
  2. page 11 of 45
  3. page 12 of 45
  4. page 13 of 45
  5. page 14 of 45
  6. page 15 of 45
  7. page 16 of 45
  8. page 17 of 45
  9. page 18 of 45
  10. page 19 of 45
  11. page 20 of 45
  12. page 21 of 45
  13. page 22 of 45
  14. page 23 of 45
  15. page 24 of 45
  16. page 25 of 45
  17. page 26 of 45
  18. page 27 of 45
  19. page 28 of 45
  20. page 29 of 45
  21. page 30 of 45
  22. page 31 of 45
  23. page 32 of 45
  24. page 33 of 45
  25. page 34 of 45
  26. page 35 of 45
  27. page 36 of 45
  28. page 37 of 45
  29. page 38 of 45
  30. page 39 of 45
  31. page 40 of 45
  32. page 41 of 45
  33. page 42 of 45
  34. page 43 of 45
  35. page 44 of 45
  36. page 45 of 45
From the file

The principle is that, at high speed and when cruising, the aircraft shall fty as an aeroplane, while for slow speed and hovering it flies as a helicopter. p. 44

This text came with the file. It may have mistakes. When the text and the image disagree, the image is right.