McMinnville 1950
On the evening of 11 May 1950, at approximately 19:30 PDT, Evelyn Trent was feeding rabbits behind her family farmhouse near McMinnville, Oregon when she observed a metallic disc-shaped object hovering in the western sky. She called her husband Paul Trent, who retrieved a Universal Roamer camera from inside the farmhouse and exposed two photographs on 620 film. The Trents had no UAP-related background, no commercial motive, and made no attempt to publicise the images — the negatives were given to a banker friend who eventually persuaded the local Telephone-Register newspaper to publish the photos on 9 June 1950. The images became the centrepiece of the Project Sign photographic case index and were later examined by the Condon Committee (1968-69), which classified them as "one of the few UFO reports in which all factors investigated, geometric, psychological, and physical, appear to be consistent with the assertion that an extraordinary flying object… flew within sight of two witnesses". The 1998 Sturrock Panel reviewed the case and concurred with Condon's classification.
The photogrammetric analyses
Three separate detailed photographic analyses of the Trent negatives have been conducted: (1) Project Sign (1950) — Wright-Patterson AFB photo-interpretation found no evidence of double-exposure, model suspension, or in-camera manipulation. (2) Condon Committee (1968-69) — analysis led by Dr. William Hartmann (planetary scientist, U-Arizona) using densitometry on the original negatives concluded the object had to be at substantial physical distance and was not a hand-held model. (3) Maccabee (1975-1981) — Dr. Bruce Maccabee (USN optical physicist) conducted iso-density contour analysis and concluded the photographs were consistent with a metallic disc approximately 10 m diameter at approximately 1.3 km from the camera. None of the three analyses found evidence of fabrication.
Verbatim — Condon Committee final report, 1969
"This is one of the few UFO reports in which all factors investigated, geometric, psychological, and physical appear to be consistent with the assertion that an extraordinary flying object, silvery, metallic, disk-shaped, tens of meters in diameter, and evidently artificial, flew within sight of two witnesses. It cannot be said that the evidence positively rules out a fabrication, although there are some physical factors such as the accuracy of certain photometric measures of the original negatives which argue against a fabrication."
— Edward U. Condon et al., Scientific Study of Unidentified Flying Objects (Bantam Books, 1969), section IV, chapter 3 (McMinnville case study)
The Sturrock Panel re-examination (1998)
In 1997-98, the Society for Scientific Exploration convened the Pocantico Panel, more commonly known as the Sturrock Panel after its chair Dr. Peter Sturrock (emeritus professor of applied physics, Stanford). The panel — a civilian academic counterpart to Condon — re-examined a small set of high-evidentiary-quality cases including McMinnville. The Sturrock final report (Journal of Scientific Exploration, 1998) sustained Condon's positive classification, noting that "three independent photographic analyses spanning 50 years have failed to identify any evidence of fabrication". The case is the only one to receive sustained positive classifications from both the Condon Committee and the Sturrock Panel — the two most-cited civilian-academic UAP photographic reviews in U.S. records.
The voice on the tape
Timeline
Evelyn Trent observes disc-shaped object behind the family farmhouse. Calls Paul.
Paul Trent exposes 2 photographs on 620 film with Universal Roamer camera.
Negatives held by Trents; given to local banker Frank Wortmann.
Photos published in McMinnville Telephone-Register newspaper.
USAF Project Sign Wright-Patterson photo-interpretation; no evidence of fabrication.
Photos circulate in civilian UFO literature.
Condon Committee re-analysis under Dr. William Hartmann. Positive classification.
Dr. Bruce Maccabee iso-density contour analysis. Sustains Condon.
Sturrock / Pocantico Panel re-examines case. Sustains positive classification.
Case file retained at NARA RG 341 as one of the few Blue Book positive-classified photographic cases.
Linked evidence in this archive
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Project Blue Book Trent photographs master file
Original negatives + Project Sign/Grudge/Blue Book photo-interpretation reports + Trent witness statements + chain of custody.
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Condon Committee Section IV Chapter 3 — McMinnville case
Dr. William Hartmann's detailed densitometric analysis. Positive classification. Foundation document for the modern civilian-academic re-examination of the case.
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Sturrock / Pocantico Panel Report — McMinnville, 1998
Dr. Peter Sturrock (Stanford applied physics) chaired panel. Sustained positive classification. Cited 50-year evidentiary trail across three independent analyses.
Why this case still matters
The Trent photographs are the only UAP case in U.S. records to receive sustained positive classifications from both the Condon Committee (1969) and the Sturrock Panel (1998) — the two most-cited civilian-academic UAP photographic reviews. Three independent analyses spanning 50 years (Project Sign, Condon-Hartmann, Maccabee) have failed to identify any evidence of fabrication. The case is the textbook example of long-baseline evidentiary persistence in the UAP photographic record.
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