Pretty cool records recently declassified. From ExtremeTech:
The aircraft, which had the code name Project 1794, was developed by the USAF and Avro Canada in the 1950s. One declassified memo, which seems to be the conclusion of initial research and prototyping, says that Project 1794 is a flying saucer capable of “between Mach 3 and Mach 4,” (2,300-3,000 mph) a service ceiling of over 100,000 feet (30,500m), and a range of around 1,000 nautical miles (1,150mi, 1850km).
Looks a lot like the Avrocar in many respects. I wonder how many UFO reports in that era were perhaps manned or unmanned tests of this aircraft. I’d imagine it’s possible that while this is now declassified, the US Government still isn’t going to admit to what degree it was tested.