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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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Le Mans, France, in the beginning of the summer 1941:

Case number:

ACUFO-1941-06-00-LEMANS-1

Summary:

In 1973, under the pseudonym “Patrice Gaston”, a French author published his book “Disparitions mystérieuses - Le cosmos nous observe” (“Mysterious Disappearances - The Cosmos Observes Us”), in which he reported the following story, indicating that it came from the “scientific journal La Nature” - he did not specify the date of publication or the issue number.

A witness is said to have stated, apparently in the form of a letter to this journal, that at the beginning of the summer of 1941, the Luftwaffe occupied the former airfield of Le Mans, France, at the Circuit de la Sarthe, and maintained several groups of Messerschmitt 109 fighter planes there. The German pilots were on permanent alert there and, several times, the witness had observed from quite close up groups of Messerschmitts taking off in broad daylight.

The witness is quoted:

“The weather was magnificent, a Sunday as far as I can remember, and at about 1 p.m. the very clear sky contained only a few large cumulus clouds, which were very far apart from each other. At about 1 p.m. the whole town heard the din of the planes taking off in haste, and I could see that the cause of the alert seemed to be in one of the large cumulus clouds which, at that moment, was flying very slowly over the airfield. One could see the Messerschmitts circling as if in a panic around the cloud, diving into it at full speed, coming out in a candle or sideways, and starting their maneuvers again, a truly very pretty spectacle, but which must have been terribly dangerous for the pilots. Was this an exercise ordered by the camp commander or an alert? I never knew, but it was curious to observe the terrified looks of the German soldiers and officers stationed in the city, who followed the spectacle from the windows of the houses.”

“I was then able to observe that the cloud which, on its arrival, seemed to have its base around 300 meters and to culminate around 1,000 meters, began to bud and, when it moved away from the airfield to move away from the city, it had taken the form of a very tall pyramid, with perfectly clear contours and brilliantly lit by the sun; its very sharp point must probably have been around 3,000 meters, according to a height visible on the horizon and its probable place on the ground. My observation point was 4 kilometers from the airfield and the cloud was about 5 kilometers away when I observed its summit.”

Data:

Temporal data:

Date: Beginning of the summer 1941
Time: 01:00 p.m.
Duration: ?
First known report date: 1973
Reporting delay: 3 decades.

Geographical data:

Country: France
State/Department: Sarthe
City or place: Le Mans

Witnesses data:

Number of alleged witnesses: Numerous.
Number of known witnesses: 1
Number of named witnesses: 0

Ufology data:

Reporting channel: Mystery book, or letter to popular science magazine.
Visibility conditions: Daytime, excellent weather, scattered clouds.
UFO observed: Yes.
UFO arrival observed: ?
UFO departure observed: ?
UFO action: Goes away.
Witnesses action: Vain intercept attempts.
Photographs: No.
Sketch(s) by witness(es): No.
Sketch(es) approved by witness(es): No.
Witness(es) feelings: Puzzled.
Witnesses interpretation: ?

Classifications:

Sensors: [X] Visual: Numerous.
[ ] Airborne radar: N/A.
[ ] Directional ground radar: N/A.
[ ] Height finder ground radar: N/A.
[ ] Photo:
[ ] Film/video:
[ ] EM Effects:
[ ] Failures:
[ ] Damages:
Hynek: DD
Armed / unarmed: Armed, one 20 mm MG 151 cannon and two 12.7 mm MG 131 machine guns.
Reliability 1-3: 1
Strangeness 1-3: 3
ACUFO: Unknown credibility.

Sources:

[Ref. pgn1:] PATRICE GASTON:

In the scientific journal La Nature, an observation is reported that is not unrelated to the Gallipoli cloud, although there are notable differences in form...

“It was in Le Mans, at the beginning of the summer of 1941,” the witness declared.

The Luftwaffe had occupied the old Le Mans airfield, at the Circuit de la Sarthe, and maintained several groups of Messerschmitt 109s, not very fast, but extremely maneuverable. The German pilots were on permanent alert, and several times I observed Messerschmitts flying in groups in broad daylight from quite close up.”

“The weather was magnificent, a Sunday as far as I can remember, and at about 1 p.m. the very clear sky contained only a few large cumulus clouds, which were very far apart from each other. At about 1 p.m. the whole town heard the din of the planes taking off in haste, and I could see that the cause of the alert seemed to be in one of the large cumulus clouds which, at that moment, was flying very slowly over the airfield. One could see the Messerschmitts circling as if in a panic around the cloud, diving into it at full speed, coming out in a candle or sideways, and starting their maneuvers again, a truly very pretty spectacle, but which must have been terribly dangerous for the pilots. Was this an exercise ordered by the camp commander or an alert? I never knew, but it was curious to observe the terrified looks of the German soldiers and officers stationed in the city, who followed the spectacle from the windows of the houses.”

“I was then able to observe that the cloud which, on its arrival, seemed to have its base around 300 meters and to culminate around 1,000 meters, began to bud and, when it moved away from the airfield to move away from the city, it had taken the form of a very tall pyramid, with perfectly clear contours and brilliantly lit by the sun; its very sharp point must probably have been around 3,000 meters, according to a height visible on the horizon and its probable place on the ground. My observation point was 4 kilometers from the airfield and the cloud was about 5 kilometers away when I observed its summit.”

What can we conclude from such an observation, except that the behavior of the Messerschmitts would have been absurd if the cloud, by its nature, presented no danger. Finally, the terrified looks of the officers at their windows would have made no sense if it had simply been an exercise.

“Something” in the sky, colossal, surrounded by a cloudy mist, attracted the attention of the aviators who hastened to go and see what was going on, at the risk of breaking their necks in perilous acrobatics. They entered the cloud, but superficially, since they immediately came out in a dive or sideways, as if they wanted to avoid a solid object, a collision...

[1] Note: urban legend, false, that a battalion of the British Royal Norfolk Regiment mysteriously disappeared in a cloud during the Dardanelles campaign in August 1915.

[Ref. jbu1:] JEROME BEAU:

1941

Early Summer

One Sunday 1941 1:00 p.m. It was in Le Mans (France), at the beginning of the summer of 1941. The Luftwaffe had occupied the old Le Mans airfield, at the Circuit de la Sarthe, and was maintaining several groups of Messerschmitt 109s, not very fast, but extremely maneuverable. The German pilots were on permanent alert and, several times, I observed quite closely at group flights of Messerschmitts in broad daylight. The weather was magnificent, a Sunday as far as I remember, and around 1:00 p.m., the very clear sky contained only a few large cumulus clouds, clouds which were very far apart from each other. About 1 p.m. the whole town heard the din of the planes taking off in haste, and I could see that the cause of the alarm seemed to be in one of the large cumulus clouds which, at that moment, was flying very slowly over the airfield. One could see the Messerschmitts circling as if in a panic around the cloud, diving into it at full speed, coming out in a dive or sideways, and starting their maneuvers again, a truly very beautiful display, but which must have been terribly dangerous for the pilots. Was this a drill ordered by the camp commander or an alarm? I never knew, but it was curious to observe the terrified looks of the German soldiers and officers barracked in the town, who followed the show from the windows of the houses. I was then able to observe that the cloud, which, upon its arrival, seemed to have its base at about 300 m and to peak at about 1000 m, began to bud and, when it moved away from the aerodrome to move away from the city, it had taken the form of a very high pyramid, with perfectly clear contours and brilliantly lit by the sun; its very sharp point must probably have been at about 3000 m, according to a height visible on the horizon and its probable place on the ground. My observation spot was 4 km from the airfield and the cloud was about 5 km away when I observed its summit.

The source is noted: “Scientific review La Nature”.

Aircraft information:

The Messerschmitt Bf 109 (pictured below) was a German single-seat, single-engine fighter aircraft that equipped the Luftwaffe in 1941. It was produced in more than 33,000 examples.

Carte.

It was armed with a 20 mm MG 151 cannon and two 12.7 mm MG 131 machine guns.

Discussion:

Map.

La Nature was a French popular science journal founded in 1873 by Gaston Tissandier (1843-1899). In 1972, it was absorbed by La Recherche.

Since “Patrice Gaston” took care not to give the issue number or the publication date, I have little chance of finding the bin number and verifying that this story was indeed published there. I note all the same that it seems to be a story of the “readers' letters” type, and that this magazine did have a section for this purpose, entitled “mailbox”.

There was indeed an airfield in Le Mans near the “24 Hours of Le Mans” circuit, used by the Germans in 1941, and located a few kilometers south of the city center of Le Mans.

As the case stands, there is nothing that allows me to know whether this story is invented or not. Doubts are permitted given the number of potential witnesses in relation to the uniqueness of the testimony.

Evaluation:

Unknown credibility.

Sources references:

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

File history:

Authoring:

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

Changes history:

Version: Create/changed by: Date: Description:
0.1 Patrick Gross July 31, 2024 Creation, [pgn1], [jbu1].
1.0 Patrick Gross July 31, 2024 First published.

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This page was last updated on July 31, 2024.