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(a ” ami} - = ee oo ~ TECHNICAL REPORT No 102-AC 1:9/15~-100 erpgenears © oS RES FER sg RTE A ‘ gir 4 306 30 UNIDENTIFIED FLYING OBJECTS Project "GRUDGE" —_,. a, ’ f a . ~ a = * . bAL ces eS «CA et te , August l9i)¢ HEADQUARTERS “a! Ls AIR MATERIEL COMBAND WRIGHT - PAT TERSON AER FORCE BASE wz i ie : iy ; 29 Ts Tt. DECLASSIFIED .| ol a re ae Sec. 5.4 a 0) A Y + 0 N , 0 Ly | 0 NND FTN S3 7 cesar By svat Date 1-hb-tLes WF-(A)-O-8 JUL'49 5M Declassification Authority: NND 57565 NOTE When drawings, specifications, and other data prepared by the War Department are furnished to manufacturers and others for use in the manufacture or purchase of supplies, or for any other pur- pose, the Government assumes no responsibility nor obligation whatever ; and the furnishing of said data by the War Department is not to be regarded by implication or otherwise, or in any manner licensing the holder, or conveying any rights or permission to manufacture, use, or sell any patented inventions that may in any way be related thereto. The information furnished herewith is made available for study — upon the understanding that the Government’s proprietary interests in and relating thereto shall not be impaired. It is desired that the Patent & Royalties Section, Office of the Judge Advocate, Air Materiel Command, Wright-Patterson AFB, Dayton, Ohio, be promptly notified of any apparent conflict between the Govern- ment's proprietary interests and those of others. Espionage Act Notice: “This document contains information affecting the national defense of the United States within the meaning of the Espionage Act, 50 U.S. C., 31 and 32, as amended. Its transmission or the revelation of its contents.in any manner to an unauthorized ~~ per son is prohibited by law.” “The above Espionage Notice can be disregarded unless this document is plainly marked with a security classification as “Restricted,” “Confidential,” “Secret,” or “Top Secret.” The U.S. Government is absolved from any litigation which may ensue from the contractor’s infringing on the foreign patent rights which may be involved. Declassification Authority: NND 57565 Technical Report Thi T POA Nr = YT} I> TIAOIMA UN S$ iftees dL i RTH I DB FI, i G OB As bi PROJECT "GRU DGE" We omith 4 ray TowlLes are" Project No. XS=30i, Approved bys | fe | onel, UoAF cni&f, Technical Analvs#§ Division Intelligence Department For the Commanding Generals ye £4 tf La vA - | id ‘ Neg F Lyi) E. WAT i SG 9 Golonel, U SAF ib at Intelligence [epartment Release Tate: Au £5 t 19,9 SECRET a Lt 3—H56))2 - 3 Declassification Authority: NND 57565 SECRET SUMMARY While there are approximately 475 incidents on record, only in-= cicents Nos. 1 thru 2h); are encompassed in this report. Of the later incidents, many have not yet been investigated, few have been completely tabulated, and none have been submitted to the consulting acencies. it is certain that better over-all results will be obtained in the analy~ Sis of the later reports, as these incidents generally have been more completely investigated, Since 5 December 1915 9 a series of eee abihaen,. phenomena described as "sreen fireballs have been reported in the general vicinity of Al- buquerque, New Mexico. Dr. Lincoln La Paz, noted ROL ROT SE AS expert, has been cirectly, though unofficially, associated with the investiga= tion of these sightings and has himself observed the phenomena. Lr. La Paz states he is convinced the screen fireballs are not ordinary meteorse fnis group of incidents has little or nothing in common with other in- cidents on file with Project Sogn. therefore, these incidents are not considered in this report. he Scientific robe gs Committee was asked to investigate this matter par had acvised that an tatenaciink investigation be concucted in the field of i canastients research. Upon eliminating several additional incidents due to vagueness nd duplication, there remain 228 incidents which are considered in this report. ‘hirty of these could not be explained, because there was found to be insufficient evidence on which te base a conclusion. nsulting agencies provided plausible sclutions for 16), incidents, aldon¢ Tits the eek comments and findings: hand Ince — (172 Incidents considered) "Ye have found now ing wiich would sericusly controvert simple rational explanations of the various phenomena in terms of balloons, conventional aircraft, planets, meteors, bits of paper, optical illusions, practical jokers, psycho-= pathological reporters, and the like." Ohio State University (Dr. Hynek ~ 2))): Incidents considered) Assuming evidences of observers and investipators to be correct, Dr. Hynek concluded that 32% could be explained astronomically, 45% oula be attributed to balloons, aircraft, rockets, birds, etc., and 33% either lacked necessary evidence or a suitable explanation was not apparente When due allowance was made for inaccuracies in observing anc reporting, 53% micht be explained astrm…