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ACUFO is my comprehensive catalog of cases of encounters between aircraft and UFOs, whether they are "explained" or "unexplained".

The ACUFO catalog is made of case files with a case number, summary, quantitative information (date, location, number of witnesses...), classifications, all sources mentioning the case with their references, a discussion of the case in order to evaluate its causes, and a history of the changes made to the file.

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France, in September 1943:

Case number:



In 1982-1984, Dr. Louis Winkler, a US astronomer at Pennsylvania State University, compiled a catalog of pre-1947 "UFO-like phenomena" for the Fund for UFO Research (FUFOR), USA.

One case he noted there was that a "flashing, jet black, cigar-shaped object was seen traveling at three times the speed of the airplane when it abruptly stopped 1 mi. away and turned and circled the airplane."

Dr. Winkler indicated that this occurred in September 1943 in France, and noted the source as "Hobana-Weverbergh".


Temporal data:

Date: September 1943
Time: ?
Duration: ?
First known report date: 1971, 1982
Reporting delay: 3 decades.

Geographical data:

Country: France
State/Department: ?
City: ?

Witnesses data:

Number of alleged witnesses: ?
Number of known witnesses: ?
Number of named witnesses: 0

Ufology data:

Reporting channel: UFO book, Winkler catalogue.
Visibility conditions: ?
UFO observed: Yes.
UFO arrival observed: ?
UFO departure observed: ?
UFO action: Circled around the plane.
Witnesses action:
Photographs: No.
Sketch(s) by witness(es): No.
Sketch(es) approved by witness(es): No.
Witness(es) feelings: ?
Witnesses interpretation: ?


Sensors: [X] Visual: ?
[ ] Airborne radar:
[ ] Directional ground radar:
[ ] Height finder ground radar:
[ ] Photo:
[ ] Film/video:
[ ] EM Effects:
[ ] Failures:
[ ] Damages:
Hynek: ?
Armed / unarmed: ?
Reliability 1-3: 1
Strangeness 1-3: 2
ACUFO: Insufficient information.


[Ref. lwr1:] DR. LOUIS WINKLER:


1943 Sep/France/Hobana-Weverbergh

A flashing, jet black, cigar-shaped object was seen traveling at three times the speed of the airplane when it abruptly stopped 1 mi. away and turned and circled the airplane.



Case 20
September, 1943


A flashing jet black cigar-shaped object was seen traveling at three times the speed of the plane when it abruptly stopped 1 miles away. Then it turned and circled the aircraft.

Source: Analysis of UFO-like data before 1947, L. Winkler, FUFOR.

Aircraft information:

Nothing is said about the plane in the sources available to me.


Dr. Winkler ([lwr1]) wrote "Hobana-Weverbergh" as being the source of this report.

This could only mean that the source was the book "UFO's From Behind The Iron Curtain", by Romanian ufologist Ion Hobana and Dutch ufologist Julien Weverbergh, first published in Holland as "UFO's in Oost en West" by Kluwer in 1971, published in 1975 in the English edition, titled "Les O.V.N.I. en U.R.S.S" in the French 1975 edition.

All I can say for now about this source is that no such case appears in the French edition. This was not suprizing to me sinc this books was about UFOs in the Eastern European countries and the U.S.S.R.

Of course, in may be that the case appeared in the first dutch editions only, especially since its title means "UFO's in the East and West"...

I will label the case "insufficient information" for now, as I do not have the primary source, and as I found no other source - the only other source I found merely citing Winkler' summary.


Insufficient information.

Sources references:

* = Source is available to me.
? = Source I am told about but could not get so far. Help needed.

File history:


Main author: Patrick Gross
Contributors: None
Reviewers: None
Editor: Patrick Gross

Changes history:

Version: Create/changed by: Date: Description:
0.1 Patrick Gross October 7, 2023 Creation, [lwr1], [dwn2].
1.0 Patrick Gross October 7, 2023 First published.

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This page was last updated on October 7, 2023.