Documents / Report
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.
evaporate as much cloud as shown in the incident 26 photographs. Together with an aerodynamist he should examine whether a meteorite of unusual shape could move as observed. 3) The calculations suggested in Part II, Section A, should be estimated by an aerodynamicist with such charges as his more-detailed knowledge may suggest. 4) The mass-pychoiology studies outlined in Part II, Section C, Classification 13 should be carried out by a competent staff of statisticians and mass-pychoologists. 5) Interviewing agents should carry objects or moving pictures for comparison with reporter's memories. These devices should be properly designed by a psychologist experienced in problems pertaining to aircraft and design of aircraft control equipment so that he shall have some grasp of what it is that is to be found out. If the Air Force has reason to be seriously interested in these reports it should take immediate steps to interrogate the reporters more precisely. 6) A person skilled in the optics of the eye and of the atmosphere should investigate the particular point that several reports agree in describing the objects as being about ten times as wide as they are thick; the point being to see if there is a plurality of actual shapes which appear so under conditions approaching limiting resolution or detectable contrast.
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.