The Reported Shape, Size, Kinematics, Electromagnetic Effects, and Presence of Sound of Unidentified Aerial Phenomena From Select Reports, 1947-2016

Brief

Powell et al. coded 301 selected UAP reports across five physical dimensions, shape, size, kinematics, electromagnetic effects, and sound, drawing on cases from 1947 through 2016. The dataset documents a recurring morphology dominated by disc, sphere, and triangular forms alongside reported flight characteristics that include instantaneous acceleration, right-angle turns, and silent operation at high apparent speed. Electromagnetic effects across reports include vehicle engine stalling, compass anomalies, and radar returns. The paper was presented at AIAA Aviation Forum 2024 in a session explicitly framed around aviation safety, placing the subject within mainstream aerospace engineering discourse for the first time at that venue's scale.

Metadata

Category

Phenomenon

Venue

AIAA Aviation 2024

Type

Conference proceedings

Year

2024

Authors

Robert M. Powell, Sarah Little, Laiba Hasan, Larry Hancock, Robinson Truong, Tobi Kamoru

DOI

10.2514/6.2024-3735

Access

Paywalled

Programs

Scientific Coalition for UAP Studies

Data sources

SCU UAP report database (1947–2016, n=301), NUFORC, MUFON, declassified government case files

Tags

UAP-physics, UAP-morphology, kinematics, electromagnetic-effects, aviation-safety, historical-dataset

Key points

• Dataset comprises 301 UAP reports selected from a larger archive spanning 1947–2016, coded for morphology, size, kinematics, EM effects, and acoustic signatures.p.2
• Shape distribution is dominated by disc, sphere, and triangular forms, with dimensional consistency across independent reports separated by decades and geography.p.4
• Kinematic data includes reported instantaneous accelerations, abrupt direction changes, and hover-to-hypersonic transitions that exceed the performance envelope of any identified aircraft or missile.p.6
• Electromagnetic interference effects documented across multiple reports include vehicle engine stalling, compass deflection, radar tracking, and electrical system disruption in close-proximity cases.p.8
• Acoustic data show a significant proportion of reports describe complete absence of sound during high-speed or low-altitude flight, inconsistent with any known propulsion system.p.9
• Presentation venue, AIAA Aviation Forum 2024, 'Advancing the Scientific Understanding of UAP to Improve Aviation Safety' session, marks one of the highest-profile aerospace-engineering conferences to formally host UAP empirical research.p.1
• The SCU (Scientific Coalition for UAP Studies) methodology applies systematic categorical coding to historical witness reports, an approach intended to surface physical patterns that are not visible in case-by-case analysis.p.3

Most interesting

• The 1947 start date anchors the dataset to Kenneth Arnold's Mount Rainier sighting, the report that introduced the term 'flying saucer' into public discourse, making this a full-sweep analysis of the modern UAP era through the year before the 2017 Pentagon disclosures.
• AIAA (American Institute of Aeronautics and Astronautics) is the primary professional society for aerospace engineers and scientists in the United States; its conference proceedings carry institutional weight that distinguishes this paper from non-peer-reviewed UAP literature.
• The simultaneous coding of five physical dimensions across 301 cases is structurally analogous to methods used in forensic epidemiology and crash-investigation databases, applying public-safety analytical frameworks to UAP data for the first time at this scale.
• The absence of sound in a significant fraction of high-speed reports is particularly constraining: at supersonic speeds, any conventional airframe or rocket produces a shock wave detectable by observers; silent supersonic flight has no aerodynamic or thermodynamic explanation in current physics.
• EM vehicle-interference cases in the dataset often involve car engines stalling and restarting after the UAP departs, a pattern independently catalogued by GEPAN (France) in the 1970s–80s, suggesting cross-national consistency in the reported physical effect.
• The paper's authors include researchers affiliated with the Scientific Coalition for UAP Studies, an independent group of scientists and engineers that has previously published peer-reviewed kinematic analyses of specific cases, including the 2004 USS Nimitz encounter.