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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 l-Astionotiical 2-Aiiaaft 3-Ujht Phenon. (•Birds 5-CloudJ, Dust, etc. 6-lnajffic Info. 7-Pjycholopcal t-IMuxran 9-Otfier Total Evaluation 0-Balloon 1-Astmoaical 2-Aircraft R i g t i t Phenoa. 4-Birds 5-Clouds, Dust, etc 5-lnsuffic Info. 7-Psychological Hjntomm 9-Ottier Total Evaluation 0-Balloon 1-Astronomical 2-Aircraft 3-Light Phenoa. 4-Birds 5-Clouds, Dust, etc. 6-lnsuffic Info. 7-Psycnologiol 8-Unkjxmn 9-Ottier Total 7%4/- Number Certain g 10 2, 0 0 t 0 13 I 4S r/ftfi Certain /2, 2/ // 0 D S a 5~3 / III Doubtful / £ // / 0 0 p z. 0 J9 £ .0 00 7-0 /•7 176 7,0 19./ Percent Doubtfu &7 7O '4s 00 0C 0-0 of 0.O 0.0 20.9 Total 27.0 I/.3 ft 00 00 70 U 27.0 70 too. 77- 4T(0n> V Number Certain J1 J'f / /£• 9 67 r// 4. 2. 0~7 //%> ' */£sr jr/y L/gir Percent Certain /4g /3./ Z.S /.I 0.0 0.0 6.2, J2J2\ ?9.O 744 ?/? 2&/Z& Doubtful 2.g /2,.& 74 /. / 0(. / / 0.0 0.0 0-0 0.0 {Si fa / Total /U /&? 2. Doubtful £ s / 0 0 0 0 0 ¥ /0 Total • f S / 0 ¥ 3 2-t. Percent Certain S.g /sr¥ 3.X 0.0 0.O /s:4\ 3.g /IS .?.& Us Doubtful 77 Jg 0O 00 0.0 MA /s-4 ?g.G Total (/•s /6^3 (92 rft 00 /&4 3.2 //•£? 19 z /00. sr Nuaiber ;m*n 7 _$- / 0 2/ 4/3 s/c Doubtful 2, g- 0 0 ?• /g >//r/ ?G//> Total f // / /0 0 & ? 6/ /P6 S a/ /A/ 7 5/0/1/ we Percent Certain //•S fg '$2 /£ 0.0 0.0 f.3 0.0 l¥4 At. 70.4 Doubtful f . f /S/ f-g 0.0 0.0 0.0 0.0 •00 13 29. s /A 7"* Total /?$ f?9 /ffl &0 00 3? 0-0 ?4f ¥9 /ft?, Number ;ertain S£S. Doubtfu 7" Total Number Certain Doubtful TotaP PeiCent Certain -• Doubtful //I/ 6/0/V Total PnCent Certain Doubtful # Total sr?/?r'£6' /> 95 li/}L/)n,t£ 0? Soor* /V/atvesr Mmber Certain /7 J¥ j S0l 2*9 Doubtful /7 2/ p- 2 0! 01 / 0 2, 7g S7~,e<f7~4. Total •?</ 92 2 0 J4 4. /0g 7 337 ~<5/f PnCent Certain £0 /a/ /L.9 0.0 /0./ 0? 32.0 /.£- 76 9 Doubtful £0 i.Z /0.4C 0.0 0,* 0/0 010 (P.3 0,0 0.£. 23/ Total /00 //.. 1 27,S 03 06 0.0 /a/ /Z 31,0 Nunbei Certain Doubtfu xr/e/?; Total rS6/c Certain « - ^ Percent Doubtful Total Number Certain Doubtfu Total Certain Percent Doubtful Total 249

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.