Carson Sink UFO Incident (1952)

Background

The Carson Sink case belongs to the 1952 UFO wave, a period in which Project Blue Book and private investigators were receiving large numbers of radar and visual reports from around U.S. military installations. Accounts of the July 24 encounter are drawn mainly from later Blue Book documentation, reproduced and discussed by the NICAP archive and by Patrick Gross's Blue Book file transcription. The crew were two experienced command pilots, which is why the case is still cited more than seventy years later.

The sighting

At about 3:40 p.m. Mountain Time, the crew of a twin-engine B-25 Mitchell, flying from Hamilton Field to Colorado Springs at 11,000 feet on the "Green 3" airway, saw three objects ahead and to the right. They first took them for F-86 jets flying in a V formation. As the objects drew close, the crew described bright silver, delta-wing craft with clean upper wing surfaces, a ridge running from nose to tail, and no visible tails or canopies. The objects banked left and passed roughly 400 to 800 yards from the bomber, in about four seconds. The crew estimated their speed at no less than three times that of a conventional jet. Sources differ on the closest distance: UAP Discovery's summary gives 400 to 600 yards.

Investigation and classification

After landing, the colonels reported the sighting to Air Defense Command, which passed it to Project Blue Book. The case was logged as No. 1584 by Michael Hall, as cited by NICAP and Gross. The Air Force's own checks found nothing that fit. Flight Service had no aircraft logged in the area at the time. Navy delta-wing jets were on the East Coast, and the Air Force's single delta-wing aircraft was grounded. Balloon flights, including large research balloons, were checked and ruled out.

Air Defense Command suggested the men had seen F-86s, but the colonels rejected that, saying they knew what F-86s looked like. Edward Ruppelt, who headed Blue Book at the time, called it a "good" report with an "unknown" conclusion. He noted that both officers had voiced skepticism about flying saucers before the sighting, and that their views had changed afterward. Ruppelt listed possible explanations, including misidentified F-86s, lost records, and hallucination, but said none could be confirmed.

Assessment

The case is widely cited as one of the stronger unexplained military reports of the early period, largely because of the crew's flight experience and the fact that Blue Book itself could not explain it. Skeptics would point to the brief duration, the absence of any photograph or physical trace, and the difficulty of judging the speed and shape of distant objects from a moving aircraft. The record also has minor inconsistencies: Ruppelt's account calls the pilots "two Air Force colonels," while other sources give their rank as lieutenant colonel, and the aircraft is called a B-26 in one NICAP page title. Those discrepancies are worth checking against the original Blue Book file before relying on any detail that is not common to all sources.