Top Secret technology in 1958, which was officially abandoned in 1961
Avro Canada VZ-9 Avrocar
Victor Chopger is partially the origin of this technology, but there was also a reverse engineering for the civilizations that preceded us.
It is an experimental plane for taking off and vertical landing developed by AVRO AIRCRAFT LTD.
Under the American secret order, in order to study the aerodynamics and the capabilities of the pirate vehicles.
The development of the plane began in 1952 in Canada. On November 12, 1959, she made her first trip. In 1961, the project was closed, as it was officially announced, due to the inability of the "courtyard" to take off the ground above 1.5 meters. Two "Avrocar" aircraft were built in total.
The Avro Canada VZ-9 Avrocar was a VTOL aircraft developed by Avro Canada as part of a secret U.S. military project carried out in the early years of the Cold War. The Avrocar intended to exploit the Coandă effect to provide lift and thrust from a single "turborotor" blowing exhaust out of the rim of the disk-shaped aircraft. In the air, it would have resembled a flying saucer. Originally designed as a fighter-like aircraft capable of very high speeds and altitudes, the project was repeatedly scaled back over time and the U.S. Air Force eventually abandoned it. Development was then taken up by the U.S. Army for a tactical combat aircraft requirement, a sort of high-performance helicopter. In flight testing, the Avrocar proved to have unresolved thrust and stability problems that limited it to a degraded, low-performance flight envelope; subsequently, the project was cancelled in September 1961.
Copies of records from the Office of the Company for the ISIS on the Air Force and the National Archives on the development of the AVRO Canada Vz-9 VTOL plane. (1794 records by the United States Air Force), 1956
The flying plate was supposed to reach a speed ranging from three to four numbers Mach (from 3200 to 4300 km per hour). The maximum height of the plate flight is more than 30 km, and the maximum range is about 1,800 km.
https://en.wikipedia.org/wiki/Avro_Canada_VZ-9_Avrocar
https://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/195801/avro-canada-vz-9av-avrocar/