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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…
Evaluinon
0-Balloon
1-A.strenomial
12-Airaatt
3-Li|M Ptimom.
4-Bnite
S-Clouds. Dust, t i c
(.traffic, Wo.
7-Piyd»ki|ial
l l M M M t
MOW
Total
JZl VL/ A £> r
Number
Cettan
/
C
0
c
0
c
t-
/ /
Doubtful
t
0
0
0
c
0
c>
4
ToUl
/
/
0
0
0
0
Q
A
7
7-
IS
Per Coil
Ctrt»n
* . 7
26.1
O.Q
0.1
o.o
0.0
oo
' 3 . 3
fi-i
OouMful ToUl
0.0
1C1
0.0
00
o.o
no
o
£>
C
0
o
/
11
Total
/ 5
1 (.
2t
3
0
\
c
0
It
8
ft
Per Cent
Certain
I2A
13. C
I t
O.Q
7 3
LSI
0.0
/S.I
JA
78. H
Doubtful
f-s
2 3
Hi
oo
0 0
0 0
CO
0.0
0. 0
1-1
11.0
Total
/ 7.0
181
27.2
i t
0.0
23
OS
O.O
/S.f
1-1
IM.
Number
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-JJL
XI
1
0
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as
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17
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t?
0
0
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1
36
Total
21
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/
0
0
if
26
6
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Percent
Certain
n.o
111
o.c
O.Q
Ml
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a.)
3-/
77t
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3.7
/Q.C
1-5
O.f
Q.d
Q.0
O-O
0-0
0,0
Q.i
?2V
Total
25.5
73.6
.!,
0-P
O.f
II-7
3-5
U.I
3.1
lit.
Nunber
:ertain
60
a
_JL
1
J&.
__2L
/&
JL
Doubtful
U-7
3/?
7?
Jf-
1
1
(?
0
1
ToUl
121
110
no
u
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X
08
I*
PI
n
PerCent
Certain
n-i
n.i
LJLR
0.5
0.2
10-t
IM
I8.B
1TL
75.1
Doubtful
1-7
H.C
II-1
Q.(,
Q.-7
0-1
• 9 - 1
0.8
0-9
0.1
Vt.7
Total
11 H
/?.3
M-I
IM
01
Q-H
I9.lt
ne
if
no.
/}v 6UST
NUBbH
Certain
-Ik
u/
£
p
3Z-
_ X
/ /
Doutitfu
.??
ZS
34
t,
1
P
1
1/0
Total
75"
ic
75
/ '
0
1
11
(,1
Percent
Certain
It 3
ll.l
II.1
l-t
JLL
UL
1.1
2-3
H.l
%t
~m
Doubtful
11.7
7-2
1.1
l l
O.O
0-3
0.0
O.-i
Q.O
I I
3l. 5
Total
2/r
18-1
Z / f
3 1
0.0
o-i
1-7L
2 0
If-2
3-1
190.
Evaluation
0-Balloon
1-A jtjonoMcal
2-Airoaft
3-Li*l PIMM.
«-Binb
WUwos, Dot. etc
C-kanffic Mo.
T-Pjjdolofcal
I-IMOOM
Mtnei
Total
Sft? T£~S-t Ff/?
Ikaber
Certain
^
3-J~
_ 1
/
/
•/?
17-
I
33
6
Doubtfu
/ /
3/
X
jZ.
/
0
2
ToUl
15
3/
3
3
/
33
a
tH7
Percent
Certain
2-1
iS.O
Lt
Sjj
OJL
0.0
£? 1
(f - 8-l
11
?•/
Q.Q
0.0
6.2
oo
2 If
4.2
Doubtful
H.I
IHC
72-1
Q.O
O.Q
0-0
0 0
0.0
o.O
0 0
41-1
Total
HI
n,75.0
7 /
0-0
0-0
6-2
Q.O
17f
U-2
0.
f 122

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.