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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.

Evaluation 0-Balloon 1-Astronuiial 2-Ancrafl 3-Li(fit Ptitnora. 4-Birds 5-Clouds, Dust, etc S-liwilfic kifo. 7-PsydolofcH S-Unkoowi 9-OOicf Total Certain ^ J 0 p r / 7 * 2O/. ' SET£e?A/£iS (/S>J7 Number Certain 0 o 3 0 / I 3 £) *7 Doubtful P P 0 X / 0 ~p~ 0 0 3 Total 0> 0 3 / 0 7 p> 3 70 Certain 04) 14-0 MO OP to0.0 0,0 3Q.D 0.0 700 Per Cent Doubtful AO 0.0 ~A0 L: 04/ 0.D 0.0 Total 00 0i 2^0 404> U 400 00 M0 01 ;//r / / • - { s/c Number Certain P 0 JL 0 _Z 0 0 p 7 0 76 Doubtful / / 3 0 •0 0 £> O 0 0 s Total / / / / 0 / 0 0> 7 p J-4 /&// PerCnt Certain -A4h W\0.0 M. JA 0.0 3J1 Doubtful /4>f 4#>3 04) 0-0 0.0 AC O.O 0.0 fid X3^i Total -ML \£W JtX. 0.0 0.0 0.0 33.3 0.0 /(PO. //e^6 r * 7 7 7 JL 0 0 0 0 7S- ?*/ F Certain to 0.0 H0-O 17 0.0 0.0 0.0 H7 0.0 73-3 erCent Doubtful ^0 p 4.7 6-7 O.O 0-0 0.0 0.0 0.0 ^rs Total 0.0 #•7 6-7 0.0 0.0 0.0 U7 0.0 Evaluation 0-Balloon l-Astrononical 2-Aircraft 3-Lijlit Ptienom. 4-Birds 5-Clouds, Dust, e t c 6-lnsuffic Into. 7-Psycholojiul 8-UnbMWi HJOier Total ^ / seeo/vas - g M//vure% Number CerUin / / / 0 0 J4. Doubtfu 3 2- f 2- M//vcr£js Number Certain P g- P 0 /r/ 31 Ooubtfu 3 0 7 1 0 0 p 0 77 Total 6 0 77 f7 & /0 0 7S 3 s-0 Percent Certain VAO 0.0 o.o ui /.f Doubtful 0.0 //./ At 0.0 0-0 0.0 0.0 J,(, 304- Total /0.V 77- /•? 0.0 77-? /OP. 0t/£4 ?0 Mwc/r£s Number :ertain _£ 1 0 p p / p J 11t- Doubtfu 0 s p o • tp p p J 0 Total 7 / 0 0 / f 3 3P P « Cent Certain / / ; nJJ. 0.0 0.0 O.l> 33 00 mp ao. m Doubtful 0.0 / / 7 0.d 0.0 0.0 P.0 0.4 '3.3 0.0 0.0 20,0 Total "•7 33 04) 0.0 to3.3 33 m70.0 /0O. Number Certain S 0 /7 7 • / 0 /? / UL 9 11 Ooubtfu 0 3 77- 0 / 0 P / P P 9 Total j T 3 XI 1 2. P 7? 7t 9 ?0 Percent Certain 0.0 JL 0.0 /J. 2Z.S I/.X 288 OaiHtbl 0.0 u 40 /.*- 0.0 0.0 ./,z AO 0.0 Total tfz- sp 1,1 0.0 M ]/.?. IPO. Evaluation O-Balloon 1-Astronomical ?-Aircraft 3-Ligrtl Phonom. 4-Birds ' S-Clouds, Oust, e t c 6-lnsutfic Info. 7-Psycholoptai t-Unfcnowi mother Total • A OAJ0S Number Certain 0 - d o 0 0 3 0 3 0 7 Ooubtfu P / Q 0 0 P 0 0 3 Total 0 / 3 0 0 P _% P 3 0 4P £•*//!/. />££ lei /j/i-r •f/ s Percent CerUin SO •AO /O.O 6,0 p,o 0.0 30,0 0-0 30.0 111 70.0 Doubtfu 0.D (0.0 WO 0.6 0.0 (?• 300 00 400. / 0 0 0 0 0 A 0.0 J14L 00 0.0 00 -A. 04) M 6.0 P,D Doubtful to33.3 0£> 31,3 10 o.o 33.3 0.0 0.0 400.0 Total 0.0 333 ao 0.0 jy.3 01 0.0 0.6 0. PJ) /0O. ft Evaluation 0- Balloon 1-Astronoaiial 2-Aircraft 3-Lifht Ptienoa. 4-Birits 5-aouds, Dint, etc S-hunffic Mfo. 7-PTYdBlorol l - t W a i o « M M w r Total 6/ Z&ee/ves - S rt//vi/r£s Nuaber Certain 0 0 p 0 / 7> 0 . 0 •A 3 Doubtful 0 / -? P /> & Total t> / 3- P ( 0 6 0 3 3 ft PerCent Certain 0 o,o 0.0 0.0 /0O 01 ~07d 0.0 30/) 301 7P.P Doubtful 0.0 1 /0.0 0-0-0 0.0 00 00 01 0.0 0.0 00 300 Total do /0.O £0.0 0L zap 00 0-0 0.0 70.0 30.0 700, 6-20 Ai/n/fres Number ;ertain / 0 _£ _ ^ P .0 3 0 JL Doubtful 7 0 0 0> 0 0 0 0> 0 / Total / / 0 / 0 3 0 y Percent Certain •0.0 JA J£0 0.0 J>.6 J2£ -M- 3LI 0.C M Doubtful 0,0 7&S- 00 0.0 00 00 0.0 ao pto p.0 Total /AS PS 0.0 00 00 /us 0.0 37S P-0 700. /!?//££ ?& A/z/uurss Number >rtain 0 ^J_ 0 _L _ ^ _ ^ P 73 P Doubtful 0 0 / 0 0 0 0 0 0 4 & Total 0 3 / 0 0 0 / /3 4 Percent Certain _ ^ 6£t 00 STO ZMJA £O_ is:o 0-0 rt.0 Doubtful 04> ao .fT0 (7.0 04) 0.0 0.0 0.0 M> 400 Total 0>6 7J7O ,f0 0.0 0.0 & &0 f.0 /M. P^/or/c/O /i/or fr/)T£a Number Certain 0 -A 0 0 6 ^7 TL Doubtful 0 0 7 0 P 0 0> P P 0> 7 Total 0 / / ^ 0 P 7 PerCent Certain 0.0 373 0.0 0.0 o.o 0.0 2/A /0S 70S mi Doubtful 0.0 0.0 0.0 0-0 0.0 0.0 0.0 0 O,0 •5Z3 Total 0.0 53 0.0 0.0 AO 3A* /AS /0S 236

Cases discussed

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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.