# Unidentified Flying Objects: Project "Grudge" (Technical Report No. 102-AC-49/15-100)

> Air Materiel Command, U.S. Air Force, 1949. 4 records on Mysteries Department cite it. The August 1949 Grudge report, whose incident index carries J.…

Source: https://mysteriesdept.com/sources/SRC0DFY3W8N6XV5/unidentified-flying-objects-project-grudge-technical-report  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Sources](https://mysteriesdept.com/sources)[Incident 88: the Hackensack disc, 3 August 1947](https://mysteriesdept.com/mysteries/incident-88)Air Materiel Command, U.S. Air Force 1949

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# Unidentified Flying Objects: Project "Grudge" (Technical Report No. 102-AC-49/15-100)

Air Materiel Command, U.S. Air Force, 1949.

**Incident 88: the Hackensack disc, 3 August 1947** Report0

## What it's used for here

The August 1949 Grudge report, whose incident index carries J. Allen Hynek's astronomical evaluations of the early incidents. The extract filed in the Incident 88 folder lists 88 under 'Non-astronomical, with no explanation evident: a. Lack of evidence precludes explanation', alongside 38, 44, 45, 47, 55, 67, 72, 86, 87 and 90.

## Cited by on this site 4 records

[Hynek's evaluations extracted from the Grudge incident index](https://mysteriesdept.com/mysteries/incident-88/artifacts/ART0DFY6QB1GN7M/hyneks-evaluations-extracted-from-the-grudge-incident-index)

ART

[The Grudge report's incident index rates Incident 88 unexplained for lack of evidence](https://mysteriesdept.com/mysteries/incident-88/events/EVT0DFY6D9QKP7T/the-grudge-reports-incident-index-rates-incident-88)

EVT

[J. Allen Hynek](https://mysteriesdept.com/mysteries/incident-88/people/FIG0DFY5XAS1N3J/j-allen-hynek)

FIG

[Incident 88: the Hackensack disc, 3 August 1947](https://mysteriesdept.com/mysteries/incident-88)

The mystery article

MYS

## Cite it

```
Air Materiel Command, U.S. Air Force (1949). Unidentified Flying Objects: Project "Grudge" (Technical Report No. 102-AC-49/15-100). https://upload.wikimedia.org/wikipedia/commons/3/39/Project_GRUDGE_Report_1949.pdf
```

[Find it at upload.wikimedia.org](https://upload.wikimedia.org/wikipedia/commons/3/39/Project_GRUDGE_Report_1949.pdf)

Key

**SRC** 0DFY3W8N6XV5

Kind

Report

Rights

The publisher's

Kept

3 Nov 2026, for editors

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[apollo](https://mysteriesdept.com/u/apollo)

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