Sperry UFO Case (1950)

Background

In the spring of 1950 the United States Air Force's Project Blue Book was still a young program, and airline pilots were among the most credible witnesses it received. The Sperry sighting is one of the better-documented airline cases of that period and was later used in the 1956 documentary Unidentified Flying Objects: The True Story of Flying Saucers, which helped keep it in the public record.

The encounter

According to the case accounts compiled by UAP Discovery, the DC-6 was flying southwest from Washington toward Nashville, Tennessee, at about 7,500 feet and 250 mph, roughly 9:20 p.m., when copilot Bill Gates saw a bright blue light ahead and alerted Capt. Sperry. The light grew larger, and as the object briefly passed between the aircraft and the moon it showed a long silhouette described as "somewhat reminiscent of a submarine," with no visible wings or tail.

Sperry made a 45-degree evasive turn to the right. The object crossed from the airliner's 11 o'clock position to its 7 o'clock position at a slightly higher altitude, then seemed to hover for about 30 seconds before circling to the right. It paced the aircraft for 20 to 30 seconds and then climbed to the east at roughly a 30-degree angle at what Sperry's account calls "fantastic" speed, vanishing from view. The crew included flight engineer Robert Arnholt, a stewardess, and several passengers.

Official handling and later accounts

The case was filed in Blue Book's unknowns. Brad Sparks' Blue Book Unknowns catalogue lists it as case 376, and Edward Ruppelt discussed it in The Report on Unidentified Flying Objects (1956). A Blue Book file includes a CIRVIS report and a February 1955 interview of Sperry by W. B. Klemperer, which, according to the case summaries, placed the blue light on the object's tail rather than its front as the 1950 press reports had described. The file did not produce an official conclusion that the case summaries cite.

Press coverage ran in the Asheville Times (30 May 1950), the Buffalo News and Sacramento Bee (31 May), and the Fort Worth Star-Telegram (1 June). Donald Keyhoe, a prominent early UFO writer, also covered it in True magazine that August.

Assessment

The sighting is usually cited as an example of trained crew observing something they could not identify, but it is also a case where the record has gaps. The main accounts come from a small number of secondary summaries, the primary Blue Book file is not widely quoted in full, and the shift in the reported light's position between the 1950 press accounts and the 1955 interview is a discrepancy that skeptics and historians note. Several explanations have been floated, including a bright meteor, a common sighting type in the era. No single explanation has been established.

The case is best read as a well-documented report of a puzzling airborne observation, not as proof of anything non-terrestrial. Its lasting value to the field is as one of the 1950 airline sightings that UAP Discovery's case notes say helped prompt the Air Force's Project Sign.