Documents / Report

Project Blue Book Special Report (second copy)

Internet Archive · 309 pages · text from the file's own layer

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. 94 …approach the speed of a jet before it disappeared. No propulsion was apparent. Time of observation…
Era-mboo
0-Balloon
l-Zutmrnieal
Mirenfl
3-UeMPtnnon.
4-Birds
S-Clouds, Dust, etc
6-lnMflic toh.
7-PjydBkiFcal
t-IMomar
MKwr
Total
Nucaber
Certan
2?
6
0
2
?
21
7b
0
•S
0
72
o01
1
m
Doubtful
9
2 0
7
0
0
I
0
0
0
'7
V9
ToUl
20
11
3 6
0
S
j
•22
0
if
iB
Hi,
PerCent
Certain
f.C
17.7
i3.f
o.O
3. 0
0.0
0.0
n.5
O.C
10.5
Doubtful
7J
'2.0,
1.2
Q.O
0 0
O.C
00
0.0
0.0
JO.7
?? S
ToUl
12.1
11.1
it.)
0.0
3.0
6.C
/I.i
0.0
'7-5
JD.&
100-
Certain
7
S2
73
i
0
7(
2
£•)
2
nf
A'fi
Nvinber
Ooubttul
3
9
8
0
1
0
0
0
0
o
i i
ToUl
10
CJ
3C
i
S
0
7i
2
S7
7
2 00
f
CsUin
J 5-
•2C9
it I
0i
l 9
0 1
130
1 0
Iff
erCent
Doubtful
'•y
H.S
*.O
o.O
O.S
0.0
Q.Q
0.0
O.Q
0.0
iff-5
Total
s-o
3QJ
o.S
7.$
0.0
/3.0
1.0
2g.S
\~T.o
J0S.
Enluatkxi
O-Bailooa
tAstnnical
2-Aircnft
3-Li|ht Pbenoa
4-Birds
Klouds, Oust, etc
S-lnsuffic kilo.
7-Psyd»l0|ical
S-lMnom
Mthcr
Total
Nttabet
Certan
QH
05
3
0
8
72
0
36
9
US
Doubtfu
5
JO
IS
3
2
0
0
0
0
f-
3?
Total
2?
38
¥0
C
Z
8
Ql
0
36
13
nv
Percent
Certain
J2'f
IM
'2.9
J.5
o.t
JLL\
it.3
o.o
ig.C
t.L
7t.f
Doubtfu
2-t
S-2
7 7
1. 0
0.0
0.1
0.*
QO
3.-I
2D.I
Total
/r.o
116
10-(
3.4
1.0
H-f
//.3
Q.0
184
-hi
100.
Certain
liC
2f
3o
1
0
0
?7
Total
37
s
7
I
12
1
It
9-
m
PefCent
Certan
81
21.9
5.7
OS
2b
AJ.
(-1
OS
1*7
/ C
C-S.l
Doubtful
JQ.j
/Of
f.f
? 1
1-0
O.S
Q.O
0.0
Q.O
o-s
.3t
0
0
0
0
Q
0
0
sz
Total
Ji
Cl
76
/
0
0
7
90
?
Ji&
Percent
Certan
*H
'ft
7.1
U
0.1
0.0
S.9
S-f
2U
S-9
cio
DaiHIul
H-2
'SS
8 3
9.1
0.0
0.0
0.0
Q.Q
0.0
00
Total
IS.?
o.c
0.0
SLO
ry
2.H
US
109

Cases discussed

About this file

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.