Project Blue Book was one of a series of systematic studies of unidentified flying objects (UFOs) conducted by the United States Air Force (U.S.A.F.). Started in 1952, it was the second revival of such a study. A termination order was given for the study in December 1969, and all activity under its auspices ceased in January 1970.
Project Blue Book had two goals:
- to determine if UFOs were a threat to national security, and
- to scientifically analyze UFO-related data.
Thousands of UFO reports were collected, analyzed and filed. As the result of the Condon Report, which concluded there was nothing anomalous about any UFOs, Project Blue Book was ordered shut down in December 1969. This project was the last publicly known UFO research project led by the USAF.
By the time Project Blue Book ended, it had collected 12,618 UFO reports, and concluded that most of them were misidentifications of natural phenomena (clouds, stars, et cetera) or conventional aircraft. A few were considered hoaxes. 701 of the reports — about six percent — were classified as unknowns, defying detailed analysis. The UFO reports were archived and are available under the Freedom of Information Act, but names and other personal information of all witnesses have been redacted.
Though many accepted Blue Book's final conclusions that there was nothing extraordinary about UFOs, critics — then and now — have charged that Blue Book, especially in its later years, was engaging in dubious research, or even perpetuating a cover up of UFO evidence. Some evidence suggests that not only did some UFO reports bypass Blue Book entirely, but that the U.S. Air Force continued collecting and studying UFO reports after Blue Book had been discontinued, despite official claims to the contrary.
Previous projects
Public USAF UFO studies were first initiated under Project Sign at the end of 1947, following many widely publicized UFO reports (see Kenneth Arnold). Project Sign was initiated specifically at the request of General Nathan Twining, chief of the Air Force Materiel Command at Wright-Patterson Air Force Base. Wright-Patterson was also to be the home of Project Sign and all subsequent official USAF public investigations.
Sign was officially inconclusive regarding the cause of the sightings. However, according to US Air Force Captain Edward J. Ruppelt (the first director of Project Blue Book), Sign's initial intelligence estimate (the so-called Estimate of the Situation) written in the late summer of 1948, concluded that the flying saucers were real craft, were not made by either the Russians or US, and were likely extraterrestrial in origin. (See also extraterrestrial hypothesis.) This estimate was forwarded to the Pentagon, but subsequently ordered destroyed by Gen. Hoyt Vandenberg, USAF Chief of Staff, citing a lack of physical proof. Vandenberg subsequently dismantled Project Sign.
Project Sign was succeeded at the end of 1948 by Project Grudge, which had a debunking mandate. Ruppelt referred to the era of Project Grudge as the "dark ages" of early USAF UFO investigation. Grudge concluded that all UFOs were natural phenomena or other misinterpretations, although it also stated that 23 percent of the reports could not be explained.
Project Blue Book
The Captain Ruppelt era
According to Captain Edward J. Ruppelt, by the end of 1951, several high-ranking, very influential USAF generals were so dissatisfied with the state of Air Force UFO investigations that they dismantled Project Grudge and replaced it with Project Blue Book in early 1952. One of these men was Gen. Charles P. Cabell. Another important change came when General William Garland joined Cabell's staff; Garland thought the UFO question deserved serious scrutiny because he had witnessed a UFO.
The new name, Project Blue Book, was selected to refer to the blue booklets used for testing at some colleges and universities. The name was inspired, said Ruppelt, by the close attention that high-ranking officers were giving the new project; it felt as if the study of UFOs was as important as a college final exam. Blue Book was also upgraded in status from Project Grudge, with the creation of the Aerial Phenomenon Branch.
Ruppelt was the first head of the project. He was an experienced airman, having been decorated for his efforts with the Army Air Corps during World War II, and having afterwards earned an aeronautics degree. He officially coined the term "Unidentified Flying Object", to replace the many terms ("flying saucer" "flying disk" and so on) the military had previously used; Ruppelt thought that "unidentified flying object" was a more neutral and accurate term. Ruppelt resigned from the Air Force some years later, and wrote the book The Report on Unidentified Flying Objects , which described the study of UFOs by United States Air Force from 1947 to 1955. Swords writes that "Ruppelt would lead the last genuine effort to analyze UFOs".
Ruppelt implemented a number of changes: He streamlined the manner in which UFOs were reported to (and by) military officials, partly in hopes of alleviating the stigma and ridicule associated with UFO witnesses. Ruppelt also ordered the development of a standard questionnaire for UFO witnesses, hoping to uncover data which could be subject to statistical analysis. He commissioned the Battelle Memorial Institute to create the questionnaire and computerize the data. Using case reports and the computerized data, Battelle then did a massive scientific and statistical study of all Air Force UFO cases, completed in 1954 and known as "Project Blue Book Special Report No. 14" (see summary below).
Knowing that factionalism had harmed the progress of Project Sign, Ruppelt did his best to avoid the kinds of open-ended speculation that had led to Sign’s personnel being split among advocates and critics of the extraterrestrial hypothesis. As Michael Hall writes, "Ruppelt not only took the job seriously but expected his staff to do so as well. If anyone under him either became too skeptical or too convinced of one particular theory, they soon found themselves off the project." In his book, Ruppelt reported that he fired three personnel very early in the project because they were either "too pro" or "too con" one hypotheis or another. Ruppelt sought the advice of many scientists and experts, and issued regular press releases (along with classified monthly reports for military intelligence).
Each U.S. Air Force Base had a Blue Book officer to collect UFO reports and forward them to Ruppelt. During most of Ruppelt's tenure, he and his team were authorized to interview any and all military personnel who witnessed UFOs, and were not required to follow the chain of command. This unprecedented authority underlined the seriousness of Blue Book's investigation.
Under Ruppelt's direction, Blue Book investigated a number of well-known UFO cases, including the so-called Lubbock Lights, and a widely publicized 1952 radar/visual case over Washington D.C.. According to Jacques Vallee, Ruppelt started the trend, largely followed by later Blue Book investigations, of not giving serious consideration to numerous reports of UFO landings and/or interaction with purported UFO occupants.
Astronomer Dr. J. Allen Hynek was the scientific consultant of the project, as he had been with Projects Sign and Grudge. He worked for the project up to its termination and initially created the categorization which has been extended and is known today as Close encounters. He was a pronounced skeptic when he started, but said that his feelings changed to a more wavering skepticism during the research, after encountering a few UFO reports he thought were unexplainable.
Ruppelt left Blue Book in February 1953 for a temporary reassignment. He returned a few months later to find his staff reduced from more than ten, to two subordinates. Frustrated, Ruppelt suggested that an Air Defense Command unit (the 4602nd Air Intelligence Service Squadron) be charged with UFO investigations.
Robertson panel
Main article: Robertson PanelIn July 1952, after a build-up of hundreds of sightings over the previous few months, a series of radar detections coincident with visual sightings were observed near the National Airport in Washington, D.C. (see 1952 Washington D.C. UFO incident). Future Arizona Senator and 2008 presidential nominee John McCain is alleged to be one of these witnesses.
After much publicity, these sightings led the Central Intelligence Agency to establish a panel of scientists headed by Dr. H. P. Robertson, a physicist of the California Institute of Technology, which included various physicists, meteorologists, and engineers, and one astronomer (Hynek). The Robertson Panel first met on January 14, 1953 in order to formulate a response to the overwhelming public interest in UFOs.
Ruppelt, Hynek, and others presented the best evidence, including movie footage, that had been collected by Blue Book. After spending 12 hours reviewing 6 years of data, the Robertson Panel concluded that most UFO reports had prosaic explanations, and that all could be explained with further investigation, which they deemed not worth the effort.
In their final report, they stressed that low-grade, unverifiable UFO reports were overloading intelligence channels, with the risk of missing a genuine conventional threat to the U.S. Therefore, they recommended the Air Force de-emphasize the subject of UFOs and embark on a debunking campaign to lessen public interest. They suggested debunkery through the mass media, including The Walt Disney Company, and using psychologists, a
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