Documents / Report

Unidentified Flying Objects: Project "Grudge" (Technical Report No. 102-AC 49/15-100)

US Air Force, Air Materiel Command · 1949-08 · 413 pages · text by OCR

This August 1949 technical report from the US Air Force Air Materiel Command presents Project Grudge's investigation of unidentified flying objects through January 1949. Drawing on consultants including Dr. J. A. Hynek, Rand Corporation, the Air Weather Service and Dr. P. M. Fitts, it explains most of 244 incidents as balloons, aircraft, astronomical phenomena, hoaxes or psychological errors. It concludes the objects pose no direct threat to national security and recommends reducing the investigation in scope.

## UNGLASSIFIED

## ASSOCIATIONS

This investigator would like to offer three recommendations, one in the general interest of the nation's airmen, and two as aids toward more effective investigation of the problem of unidentified aerial objects, if such work is continued:

First and foremost, it is definitely recommended that air Forces personnel be apprised of simple astronomical phenomena like the recurrent brilliance of Venus and the characteristics of a typical fireball, so that much confusion and alarm and even possible tragic consequences can be avoided. If, as seems possible, Lieutenant Mantell not his death while attempting to chase down Venus, certainly the need for such basic education is great.

Second, if Project GRUDGE is authorised to extend its investigations, it might be found profitable to interrogate personally varied trained personnel concerning any unanticipated aerial objects which they may have observed in the past. Many competent observers might hesitate to take the initiative in reporting such phenomena for fear of ridicule or criticism, yet it is only from such people that accurate and meaningful descriptions can be obtained; reliance on the general public for such observations is almost certain to prove of little value. It would be of considerable aid to know whether (aside from the few cases reported here) experienced pilots, weather observers, and other "watchers of the sky" have ever found unidentified objects there. Even negative results would prove valuable, for they would offer evidence for the belief held by many that the unexplained

Cases discussed

About this file

Report, from the classic collection. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 413 pages are in the text index: search them above, or from the library's search.