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.
Its location and configuration is then plotted. Statistical graphs are brought up to date. 2. Information for locating and comparing is recorded on card files by witness, and on a tabular sheet for convenient study. 5. Pertinent information is extracted, condensed, and compiled on an Incident Summary Sheet, which is similar to the first two pages of the Guide to Investigation. 4. Entire incident files are microfilmed, in order that technical consultants will have access to all available information if desired. 5. Data is collated against monthly blimp flight reports, Airline schedules, information on ball lightning, and other known serial objects. ## Consultante Since, as stated above, there were indications that once eightings could be attributed to natural phenomena, conventional aircraft and serial vehicles, birds, lights, clouds, etc., effort was made to have all material analyzed by individuals in all technical fields that might conceivably be touched upon. These individuals and agencies include the following (only those agencies which provided usable results are considered): 1. Dr. J. A. Nynek, Astronomer, Ohio State University was awarded a contract, effective 16 December 1942 to 30 April 1949, for the purpose of attempting to determine which reported objects might be attributed to natural celestial phenomena. 2. Headquarters Air Weather Service was requested to review each incident to determine those which may have been weather balloons by comparison of release and weather data with time of sighting, description of object, and its maneuvers. 3. Dr. O. E. Valley, Scientific Advisory Board. Since many reporters colored their reports with talk of ray, electronic beams, and magnetic support and propulsion, Dr. Valley was asked to analyze the incidents and decide whether this could possibly be the case in any instance, and to provide information on this matter. 4. Rand Corporation was requested to analyze each in- oident and provide any reasonable explanation that could be determined from the evidence given. Rand also provided a discussion of the pos- ability of visitations by beings from other planets.
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.