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Project Blue Book Special Report (second copy)

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This is Project Blue Book Special Report No. 14, "Analysis of Reports of Unidentified Aerial Objects," Project No. 10073, dated 5 May 1955. The study reduced about 4,000 sighting reports received by the U.S. Air Force between June 1947 and December 1952 to IBM punched cards and analyzed them statistically, including chi square tests comparing knowns with unknowns. It concludes that the reports very probably do not represent technological developments beyond present scientific knowledge, and it notes that no case produced physical evidence.

  • p. 3 …Questionnaire 4 Coding System and Work Sheet 6 Identification of Working Papers 7 Evaluation of Individual…
  • p. 10 …During the course of the work, the number of reports sub- mitted for analysis and evaluation…
  • p. 13 …On the basis of this analysis, plus the experience gained in working with past reports, the…
  • p. 14 Coding System, and Work Sheet The reduction of non-numerical data to numerical form is mandatory…
  • p. 15 /v Identification of Working Papers The actualjreduction of d.ata to IBM jaujijchedj^c_a.rd…
  • p. 16 …most representative report from each MULTIPLE OBSERVATION. (2) The questionnaire, work sheet, and IBM card representing…
  • p. 17 …report for each phenomenon. (2) The questionnaire, work sheet, and IBM card representing a report for…
  • p. 18 …Using one column of the IBM card, and the correlated working papers, the code for this…
  • p. 21 …This work was done at ATIC, periodically, as reports became ready. During an identification conference, each…
  • p. 84 …only of persons previously associated with the work. Using all the UNKNOWNS reports available at ATIC…
  • p. 97 …for a radio station was driving to work from his home when he noticed an object…
  • p. 101 …This feeling of surfeit was universal among the personnel who worked on this project, and continually…
  • p. 261 APPENDIX B WORKING PAPER FORMS M i 255 and 256
  • p. 262 …Codes for Work Sheet Exhibit B5. Work Sheet . Exhibit B6. Codes for Card Bible Exhibit B7…
  • p. 289 t EXHIBIT B4 CODES FOR WORK SHEET ft 289 and 290
  • p. 295 fc! EXHIBIT B5 WORK SHEET • 1 297 and 298
  • p. 296 Observer's Data Sheet Question WORK SHEET Punched Card Column Code Description 2 3 h Serial…
  • p. 299 …These cards (and the corresponding WORK SHEETS) contain data from several sources. Columns referenced to the…
(3) Case III does not satisfy Condition 1. It also does not
satisfy Condition 4 when Case II is eliminated as a
good UNKNOWN.
(4) Case IV does not satisfy Conditions 1 or 2. There are
few cigar-shaped or rocket-shaped objects reported in
the literature. In addition, this observer is not con-
sidered to be well-qualified technically.
(5) Case V does not satisfy Condition 1. It also does not
satisfy Condition 4 when Case IV is eliminated as a
good UNKNOWN.
It might be argued here that many of the UNKNOWNS might actually
have shapes similar to these good UNKNOWNS. It will be noted, however,
that each of these five cases does not satisfy one of the other three condi-
tions.
(6) Case VI does not satisfy Condition 2. In the description
of the object, it was stated that at certain times there
was no light seen from the object. Apparently, the
"band of no light", as diagrammed by the observer, was
an attempt to explain this. However, if the object were
constructed as shown in the diagram, light should have
been seen at all times. Because of this conflict the
drawing is not considered reliable, and without the draw-
ing, there is not enough detail in the description to make
it useful for this study.
(7) Case VII violates Conditions 1 and 4. Although the shape
is disc-like, the maneuvers performed by the object are
unique both among the UNKNOWNS and among the good
UNKNOWNS.
Cases VIII to XII satisfy Conditions 1 through 3, but they do not
satisfy Condition 4. The features which make them different from each
other are as follows:
(8) Case VIII. The object is smooth, with no protrusions
or other details.
(9) Case IX. The object had rocket or jet pods on each
side that were shooting out flames.
(10) Case X. The object had a fin or rudder.
(11) Case XI. The object had a series of portholes, or
windows, on its under side.
92

Cases discussed

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Report, cited by the archive. The PDF is mirrored here; the original link is under it. 309 pages are in the text index: search them above, or from the library's search.