Project Grudge

Name: UFO Transparency
Creator: UFO Transparency
License: https://creativecommons.org/licenses/by/4.0/

The Air Force's 1949 Project Grudge report, the public successor to Project Sign and a key predecessor to Project Blue Book. Primary Grudge files, AARO historical references, and related early-Cold-War program records.

Files

Findings

Papers

1949-2024

Years

Primary documents · 5

PDFProject Grudge Final Report, August 1949U.S. Air Force Air Materiel Command
PDFProject Twinkle Final ReportUSAF / Cambridge Research Laboratories
PDFAARO Historical Record Report, Volume I, 2024DoD / All-domain Anomaly Resolution Office (AARO)
PDFAARO HRR Vol I, Wikimedia MirrorDoD / All-domain Anomaly Resolution Office (AARO)
PDFAARO HRR Vol I, Pentagon Canonical PDFDoD / All-domain Anomaly Resolution Office (AARO)

Findings · 4

Scholarly research · 3

PAPERThe New Science of Unidentified Aerospace-Undersea Phenomena (UAP)Knuth et al. · 2025
PAPERAn environmental analysis of public UAP sightings and sky view potentialMedina et al. · 2023
PAPERThe Prospect of Executive Branch UAP Secrecy: The Harm to Congress and Potential RemediesSkafish · 2024