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ACUFO:

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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Central Sweden, in the Spring of 1945:

Case number:

ACUFO-1945-00-00-CENTRALSWEDEN-1

Summary:

In his 2003 book “Strange Skies - Pilot Encounters with UFOs”, erudite US ufologist Jerome Clark indicated that there was a pilot sighting in Scandinavia in the spring of 1945. Among the witnesses was Albin Ahrenburg (actually “Ahrenberg”), a “Swede well known in his country as a pioneer of aviation.” Clarke says that along with other accomplishments, he was a founder of Sweden's first airline company.

At the time, Ahrenberg was working for the Geographical Survey Office and serving as a civilian employee of the Air Force. With six crewmembers, he was flying over the central part of Sweden when they encountered what Ahrenberg called an “aerial bus”, perhaps an oval or cigar-shaped object, nearly 40 feet long, with a row of oval windows along its side. It paced the aircraft for an astonishing hour and a half, Ahrenberg told to a Stockholm ufologist years later.

Data:

Temporal data:

Date: Spring of 1945
Time: ?
Duration: 1:30
First known report date: 2003
Reporting delay: Decades.

Geographical data:

Country: Sweden
State/Department: Central Sweden
City or place:

Witnesses data:

Number of alleged witnesses: 1 or more.
Number of known witnesses: 1
Number of named witnesses: 1

Ufology data:

Reporting channel: A Swedish ufologist.
Visibility conditions: ?
UFO observed: Yes.
UFO arrival observed: ?
UFO departure observed: ?
UFO action: Follow planes.
Witnesses action:
Photographs: No.
Sketch(s) by witness(es): No.
Sketch(es) approved by witness(es): No.
Witness(es) feelings: ?
Witnesses interpretation: ?

Classifications:

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

Sources:

[Ref. jck1:] JEROME CLARK:

The author indicates that there was a pilot sighting in Scandinavia in the spring of 1945. Among the witnesses was Albin Ahrenburg, a “Swede well known in his country as a pioneer of aviation.” Clarke says that along with other accomplishments, he was a founder of Sweden's first airline company.

At the time, Ahrenburg was working for the Geographical Survey Office and serving as a civilian employee of the Air Force. With six crewmembers, he was flying over the central part of Sweden when they encountered what Ahrenburg called an “aerial bus”, perhaps an oval or cigar-shaped object, nearly 40 feet long, with a row of oval windows along its side. It paced the aircraft for an astonishing hour and a half, Ahrenburg told to a Stockholm ufologist years later.

Aircraft information:

No information is known to me about the plane involved in this incident.

Discussion:

Map.

I found out in the “Aviation Safety Database” aviation-safety.net/wikibase/202525 that on January 31, 1939, by day a de Havilland DH.60G Moth owned and / or operated by Captain Albin Ahrenburg, owner of “A/B Flygtrafik” crashed into a lake after a collision near Gavle, Gävleborg County in Sweden.

I found out that the company “AB Flygtrafik” was started in 1937 by Oscar Lilljeqvist, who had worked with his brother-in-law, “the aviation pioneer Albin Ahrenberg (1889-1968)”, who founded the company “AB Ahrenbergsflyg”.

AB Flygtrafik photographed almost all of Sweden from the air, but also took many pictures from the ground, selling them in postcard format. During the Second World War, it was difficult to get permission to publish aerial photos, and ground photos “AB Flygtrafik” remained in existence into the 1990s.

With the correct name “Albin Ahrenberg”, I found out the latter came to the Navy in 1919 after flight training, he was a pilot with “Svensk Lufttrafik AB” from 1921 to 1923. He then started a flight school in Malmö. During these years he has contacts with military aviation. In 1924 he left the military aviation for civilian activities and started Ahrenbergsflyg, flying o ver Sweden to take aerial photography and postal flights. During World War II, Ahrenberg was appointed head of the air station with locations at Galö and Harsfjärden in Stockholm's southern archipelago. In 1957 he published a book about his life, “Ett Flygarliv”.

Wikipedia gives his full name as “Johan Oskar Albin Ahrenberg”, and indicates he born 1889 in Arby in the Smaland and deceased in 1968.

Evaluation:

Possible extraterrestrial craft.

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 December 14, 2023 Creation, [jck1].
1.0 Patrick Gross December 14, 2023 First published.

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This page was last updated on December 14, 2023.