Documents / Analysis

Project Blue Book Special Report No. 14: Analysis of Reports of Unidentified Aerial Objects

United States Air Force, Air Technical Intelligence Center · 1955-05-05 · 309 pages · text from the file's own layer

Special Report No. 14 was issued by the U.S. Air Force's Air Technical Intelligence Center on 5 May 1955. It is a statistical study of about 4,000 reports of unidentified aerial objects from June 1947 to December 1952. The reports were reduced to IBM punched cards and analyzed with methods including chi square tests. The report concludes that the reports it examined are very unlikely to represent technology beyond present scientific knowledge, and it notes that no case produced valid physical evidence.

  • p. 245 …P _/) - 7 P P 3 ?% ToUl •6 'r? g_ 0 70 '0 5L3fy Per Cent . Certain…
  • p. 256 …c Doubtful 2, g- 0 0 ?• /g >//r/ ?G//> Total f // / /0 0 & ? 6/ /P6 S…
  • p. 258 …9 0 $ / 'i a 2£ -L 43 r/?g(. Certain / / f2> 2. I? ?; •2V 1 7…
12.1 Circle one of the folio-wing to indicate how certain you are of your
answer to Question 12:
a. Certain
b. Fairly sure
c. Not very sure
d. Just a guess
13* Did the object look: (Circle One) Solid or Transparent
Did the object a t any time:
(Circle One for each question)
l l i . l Change direction? Yes Mo Don't know
tk.2 Change speed?
III.3 Change size?
Xi4.li Change color?
lU»5 Break up into parts or
esqplode?
111.6 Give off smoke?
lU.7 Change brightness?
lU«8 Flicker, throb, or
pulsate?
lU.9 Remain motionless?
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Mo
No
No
No
No
No
No
Yes No
Did the object give off a light? (Circle One)t Yes
15.1 IF you answered YES., what was the color of the light?
16, Tell in a few words the following things about the object?
16.1 Sound
16.2 Color __
17. IF there xras MORE THAN ONE object, then how many were there?
Don't
Don't
Don't
Don't
Don't
Don't
Don't
Don't
No
know
know
know
know
know
know
know
know
Don't know
Draw a picture of how they were arranged and put an arrow to show the
direction they xjere traveling.
18. Did the object a t any time;
13.1 Hove behind something? (Circle One) Yes No Don't know
IF you answered YES, then t e l l what i t moved behind.
272

Cases discussed

About this file

Analysis, from the classic collection. 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.