CIA-UAP-015-Project_Blue_Book_Special_Report_No_14.pdf

FORM 2250
6-64
Approved for Release 2026 Under Section 1842 of the National Defense Authorization Act for Fiscal Year 2024
2, 503 283
315 pages
(PLACE FORM 490 HERE)

# OFFICIAL RECORD

Received by RjWarsh
11/21/94

The Agency in accordance with
addition Records
Clipped items new in computer

RETURN IMMEDIATELY AFTER USE TO THE
CIA ARCHIVES AND RECORDS CENTER

FORM 6-64 2250
2, 502 283
315 pages
(PLACE FORM 490 HERE)

# OFFICIAL RECORD COPY

## WARNING

The attached document(s) must be safeguarded. It is the Agency's Official Historical Record and must be preserved in accordance with the Federal Records Act of 1950. For additional information, call the Chief, CIA Archives and Records Center, extension 2468.

RETURN IMMEDIATELY AFTER USE TO THE CIA ARCHIVES AND RECORDS CENTER

PROJECT BLUE BOOK
ASD/A file 280

SPECIAL REPORT NO.14

(ANALYSIS OF REPORTS OF UNIDENTIFIED AERIAL OBJECTS)

PROJECT NO. 10073

5 MAY 1955

FOR OFFICIAL USE ONLY
(AFR 190-16)

AIR TECHNICAL INTELLIGENCE CENTER
WRIGHT-PATTERSON AIR FORCE BASE
OHIO

Copy No. 35

PROJECT BLUE BOOK

SPECIAL REPORT NO. 14

(ANALYSIS OF REPORTS OF UNIDENTIFIED AERIAL OBJECTS)

PROJECT NO. 10073

5 MAY 1955

FOR OFFICIAL USE ONLY

(AFR 190-16)

AIR TECHNICAL INTELLIGENCE CENTER

WRIGHT-PATTERSON AIR FORCE BASE

OHIO

No copyright material is contained in this publication.

TABLE OF CONTENTS

Page
SUMMARY  vii
INTRODUCTION  1
ORIGIN AND NATURE OF DATA  3
REDUCTION OF DATA TO MECHANIZED COMPUTATION FORM  4
Questionnaire  4
Coding System and Work Sheet  6
Identification of Working Papers  7
Evaluation of Individual Reports  10
ANALYSIS OF THE DATA  14
Frequency and Percentage Distributions by Characteristics  14
Graphical Presentation  16
Advanced Study of the Data  16
Position of the Sun Relative to the Observer  16
Statistical Chi Square Test  60
The "Flying Saucer" Model  76
CONCLUSIONS  94
APPENDIX A. TABULATION OF FREQUENCY AND PERCENTAGE DISTRIBUTIONS BY CHAR…

LIST OF ILLUSTRATIONS
(Continued)

|  Figure | Description | Page  |
| --- | --- | --- |
|  Figure 14 | Distribution of Object Sightings by Months Among the Eight Duration Groups for All Years | 30  |
|  Figure 15 | Distribution of Object Sightings by Shape of Object(s) Reported With Evaluation Distribution for Each Shape Group | 31  |
|  Figure 16 | Distribution of Object Sightings by Reported Speed of Object(s) With Evaluation Distribution for Each Speed Group | 32  |
|  Figure 17 | Distribution of All Sightings by Observer Location for All Years and Each Year | 33  |
|  Figure 18 | Comparis…

v and vi

# LIST OF ILLUSTRATIONS
(Continued)

|  Figure | Description | Page  |
| --- | --- | --- |
|  38 | Comparison of Evaluation of Object Sightings in the Strategic Areas of the South Farwest Region | 54  |
|  39 | Diagram of a Celestial Sphere | 56  |
|  40 | Frequency of Object Sightings by Angle of Elevation of the Sun, Intervals of 10 Degrees of Angle | 57  |
|  41 | Frequency of Object Sightings by Local Sun Time, Intervals of One Hour | 59  |
|  I | Object Sightings | 60  |
|  III | Chi Square Test of Knowns Versus Unknowns on the Basis of Color | 62  |
|  III | Chi Square Test of …

# SUMMARY

Reports of unidentified aerial objects (popularly termed "flying saucers" or "flying discs") have been received by the U.S. Air Force since mid-1947 from many and diverse sources. Although there was no evidence that the unexplained reports of unidentified objects constituted a threat to the security of the U.S., the Air Force determined that all reports of unidentified aerial objects should be investigated and evaluated to determine if "flying saucers" represented technological developments not known to this country.

In order to discover any pertinent trend or pattern inherent in t…