RADCAT Case Directory
  Category 9, RADAR  


RADCAT is a revitalized special project now being conducted jointly by NICAP & Project 1947 with the help and cooperation of the original compiler of RADCAT, Martin Shough, to create a comprehensive listing of radar cases with detailed documentation from all previous catalogues, including UFOCAT and original RADCAT.

Radar Visual Near AEC Plant (BBU)
June 20 (not 21), 1952
Oak Ridge/Maryville, Tennessee

Brad Sparks:
June 20, 1952 (June 21 GMT Z-time).  10 mi NNE of Maryville, Tenn.
10:58-11:15 p.m. (EST).  Oak Ridge GOC post spotted target at very high altitude, reportedly confirmed by ADC 663rd AC&W radar but soon lost [CPS-6B? radar at P-42, Permanent-42, ADC Site, Lake City, Tenn., or by TPS-1B radar at L-47, Lashup-47, ADC radar site at McGhee-Tyson Airport, Maryville ?]. F-47 fighter on combat air patrol protecting Oak Ridge AEC base (USAF pilot Lt James W. Wilson) sighted blinking (6-8-inch ?? 6-8-foot ??) white light on what was assumed to be a larger highly maneuverable jet-like aircraft though no silhouette could be seen around the light.  UFO made ramming attacks on the F-47 at 10,000 or 15,000 ft (?) to 22,000 ft by dropping down 4,000-5,000 ft, able to “outmaneuver and outclimb” F-47 flying at the F-47’s indicated air speed ~290 mph. Radar controller notified ADC Air Defense Control Center and obtained permission to fire on UFO but F-47 unable to get into firing position.  UFO’s white blinking light became steady when doing power maneuvers.  Final attack run from UFO came from estimated 28,000 ft down to F-47 at 22,000 ft, then UFO pulled back up to 25,000 ft while F-47 continued climb to 23,000 ft, UFO disappearing by blinking out or fading due to distance [through broken cloud layer at 23,000 ft]. Attempted BB explanation of lighted weather balloon “dog-fight” failed as the lighted 100-gram pilot balloon was launched from McGhee-Tyson Airport near Maryville at 10:00 p.m. and was tracked by weather observers until light failed at 10:13-10:15 p.m. at 14,000-16,000 ft who saw no F-47 or UFO or “dog-fight” since it happened 45 mins later at 10:58-11:15 p.m.  (Sparks;  30th Air Div Hist., Apr-June 52, Robert Powell / Jan Aldrich Project 1947;  NICAP website/Fran Ridge;  BB Maxwell Microfilm Roll 10, pp. 1481-1497;  Ruppelt pp. 43-44; Menzel 1963) 17 mins, 4+ witnesses

Fran Ridge:
We had first heard about this incident from Edward Ruppelt, who was the Captain and head of Project Blue Book. He stated in his book, "The Report on Unidentified Flying Objects", that a Ground Observer Corps spotter reported that a slow-moving craft was nearing the AECs Oak Ridge Laboratory, "an area so secret that it is prohibited to aircraft. The spotter called the light into his filter center and the filter center relayed the message to the ground control intercept radar. They had a target. But before they could do more than confirm the GOC spotter's report, the target faded from the radarscope. An F-47 aircraft on combat air patrol in the area was vectored in visually, spotted a light, and closed on it. They 'fought' from 10,000 to 27,000 feet, and several times the object rnade what seemed to be ramming attacks. The light was described as white, 6 to 8 inches in diameter, and blinking until it put on power. The pilot could see no silhouette around the light. The similarity to the Fargo case was striking."

Brad Sparks:
Robert Powell obtained the ADC document a few years ago and then found the UFO shooting authorization in this case.  It was in the ADC 30th Division History for April-May-June 1952, p. 83, "On 21 June 52, an F-47 of the 105th FI Squadron, on a night training flight reported a light, apparently on a very fast and maneuverable aircraft, making passes at him and that the object was able to outmaneuver and outclimb his aircraft.  The controller on duty notified the ADCC (Air Defense Control Center) and permission to fire on the object was obtained." This great discovery proves that vital info such as the ADC firing-on-UFO authority is withheld from reports to BB, where no ADC teletype in the BB file mentions it, yet it appears in the SECRET ADC history. 

Detailed reports and documents
reports/520621oakridge_rep.htm (Dan Wilson)
Detailed Analysis.OakRidge/Maryville.[4 Sept 2020] (Brad Sparks)

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