Documents / Report

Analysis of Flying Object Incidents in the United States, 1949

U.S. Department of War · 1949-04-28 · 34 pages · text from the file's own layer

This declassified Air Intelligence Report No. 100-203-79 is a Top Secret study by the Directorate of Intelligence, Headquarters USAF, and the Office of Naval Intelligence, dated 10 December 1948. It looks at about 210 reported flying object incidents and concludes that some type of flying object has been observed, though what the objects are and where they come from cannot be determined. It considers domestic devices or Soviet aircraft based on German flying wing designs, and its appendices cover selected reports, explained cases and flying wing aircraft.

From the source: Release of 2026-07-10 Incident: 4/28/49, Virginia. This file contains a U.S. Air Force (USAF) Air Intelligence Division study, “Analysis of Flying Object Incidents in the United States,” Study No. 203, dated 04/28/1949. The analysis includes an assessment of various reported unidentified flying object (UFO) incidents and theories to account for their nature and origin. Overall, the study assesses that “it appears that some object has been seen; however, the identification of that object cannot be readily accomplished.” The study offers that two “reasonable” origins might account for the phenomena: technologies of a domestic or foreign origin. It also suggests that, if foreign, it is prudent for the United States to assume that UFO observations are attributable to scientific, military, or intelligence activities of the Soviet Union, and, in that case, to take seriously the threat such objects may pose. The file also contains selected contemporary UFO reports and examples of experimental “flying wing” type aircraft planforms that might account for certain commonly reported UFO characteristics. AARO Comment: This file appears to be a later revision of the file contained in DOW-UAP-D093, whose content is substantively similar.

Although reported domestic incidents are widely scattered throughout the U.S., frequency of
sighting and number of observers per sighting assumes a definable pattern. There ls a large con
centration of sightings along the Eastern Seaboard; another large concentration throughout the
Western Coast states, and a few sightings in the Middle West. Distribution of. incidents by con- •
figuration af object and description of maneuverability is approximately equal 1n each of these
areas and this ls belleved to further substantiate the possibility that one type of object might have . k
been observed In dl:fferent aspects of flight.
?f sightings are induced by rumor, it seems unusual that more incidents have not been reported
from the areas with high concentration of population. Reports from such areas would also have
greater facility 1n channeling either to newspaper or official reporting agencies. For the most part,
sightings have been made in fairly open country where there are few restrictions to visibility, which
may indicate that obstructed vision has reduced sightings 1n bullt-up areas.
It therefore seems that some type of flying object has been observed; the ldentlftcatlon of
its origin requires the compet1on of other analyses.
3. POSSIBLE ORlGIN OF UNUSUAL FLYING O CTS. Provided, upon the completion of. analyses,
it is'ln<nciite~ffiar-iroi:ne01::-S:!rof'truri:wor1:ec bjects over the U.S. are of foreign origin,
the objects could from a logical viewpoint, be considered Soviet. It is evident' from the pertorm
ance characteristics attributed to the unidentified objects at this time that if they are foreign, they
involve efficiencies of performance which have not been realized in any operational airborne device
in this country. It would, therefore, be a mistake to analyze the technical aspects of the situation
within the limits of our own knowledge of practical developments. n ls more desirable to consider
then the outer limits of possible .soviet developments and objectives ln attempting to formulate some
idea of the tactics which might be involved.
First of all, the scientific objectives of the U.S.S.R. have been stated many times and Jndicated
1n many forms. The most clearcut statement of this objective ls probably the one contained in the
preamble to the Fourth Five-year Plan (1946-1950} which states that the objective of Soviet .science
ls to overtake and surpass the scientific and technical developments of the capitalist nations. It
apparently would be an impossible task for the Soviet Union to accomplish such an objective by pro
ceeding step-by-step along the same lines of development already achieved in the capitalist nations.
This would mean that. lt would be necessary to rapidly proceed through each phase of aeronautical
development that has already been accomplished in this country, and this obably would never• have
any prospects of accelerating Soviet development beyond any point reach by the U.S. The obvious
answer to accomplish their objective of not only overtaking, but surpassing the capitalist countries
would be a scient1flc shortcut. This possibllity ls not so remote when examined on the basis of
our knowledge of the current situation 1n the U .S.S.R. Provided Soviet emphasis was given to the
most promising and advanced ideas acquired from Germany 1n 1946 and the work aided by German
scientists, the possibility of catching up and possibly .surpassing other nations 1n technical develop
ments becomes more realistic. • It becomes even more realistic l:f the Soviets have shown a tendency
to concentrate on certain developments which have still not received a maximum of priority in our
own programs.
n 1s known that the U.S.S.R. has since 1945 enlisted the services of Dr. Guenther Bock, a
German who headed all development of low aspect ratio (flying wing) type aircraft in Germany.
Dr. Bock is believed to be the top German scientist In charge at TSAGI and TSIAM which are
"Air Materiel Command" type organizatlons ln the U.S.S.R. Further, it is believed that Dr. Bock
has made available all German plans for flying wing type aircraft to the Soviets. Among the de
signs considered by the Germans and possibly explolted by the U.S.S.R., are jet-propelled, flying
wing type aircraft whose configuration would be similar to descriptions of certain objects reported
flying over the U.S. The estimated speeds of such aircraft are within range of the lower limits.
of speed attributed to flying objects over the U.s. It ls not impossible that emphasis on surpassing
foreign developments has led to unusual progress 1n fuels and propulsion by the U.S.S.R. In con
nection with possible advancements 1n the field at fuels and propulsion, it should be observed that
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Cases discussed

About this file

Report, from the pursue collection. The PDF is mirrored here; the original link is above. 34 pages are in the text index: search them above, or from the library's search.