Project 10073 Record Card — Westover AFB, Massachusetts, 17 July 1956

This document is a Project 10073 record card detailing a radar sighting that occurred on July 17, 1956, at Westover Air Force Base in Massachusetts. The sighting, which lasted approximately four minutes, involved a single object tracked by ground radar. The object was described as a regular radar target, though it was noted to be larger than typical targets. The report highlights the object's unusual flight characteristics, specifically its ability to perform a 180-degree turn in less than six seconds and its capacity to rapidly increase and decrease speed. The report explicitly states that all other air traffic in the vicinity was accounted for, ruling out conventional aircraft as the source of the radar return. Despite the detailed radar tracking, which included a speed estimate of 2400 miles per hour, the official conclusion reached by the evaluating agency was that there was insufficient data for a definitive analysis. The altitude of the object was not reported. The document includes administrative routing information, indicating that the report was processed through various military intelligence channels, including the Air Technical Intelligence Center at Wright-Patterson Air Force Base and the Director of Intelligence at Headquarters USAF in Washington, D.C. The weather conditions at the time of the sighting were reported as clear with calm winds.