Report of Unconventional Airborne Object — South Ruislip, England, 10 November 1950

This document is a collection of reports and correspondence regarding a series of radar contacts with an unidentified airborne object over England on 10 November 1950. The observations were made by personnel of Detachment H, 3903rd Radar Bomb Scoring (RBS) Squadron, operating an AN/MPQ-2 radar set at Heston Airdrome. Between 0859Z and 1026Z, four distinct radar contacts were recorded. The object was described as having a size comparable to a B-29 or C-54 aircraft, with speeds ranging from 30 to 1,000 miles per hour. The object exhibited highly unusual flight characteristics, including abrupt changes in course, rapid acceleration, and significant altitude changes, which the radar operators found impossible to track with standard equipment. The weather conditions at the time were poor, with 10/10 cloud cover, rain, and high winds.

Internal correspondence between the Third Air Division and the Air Materiel Command (AMC) in Dayton, Ohio, highlights confusion regarding the reporting of these sightings, with some initial uncertainty about whether the reports referred to the same event. The AMC Intelligence Department ultimately evaluated the data and concluded that the radar echoes were 'spurious' and caused by atmospheric conditions, specifically ice-laden clouds. This conclusion was supported by a comparison to a similar incident at Wright-Patterson Air Force Base on 8 March 1950, where interceptor aircraft failed to locate any physical object despite radar returns. The AMC suggested that the rapid changes in target altitude, direction, and speed were attributable to rapid changes in the local atmosphere. The document includes statements from radar technicians and officers who were on duty during the event, all of whom noted the unusual nature of the tracks and the equipment's performance. Despite the official explanation of atmospheric phenomena, the reports emphasize that the radar equipment was in first-class operating condition and that other aircraft in the area were tracked without difficulty, suggesting the object's behavior was distinct from standard flight patterns.