M1148 Flying Saucers (1954–1955) — Prime Minister Menzies Personal Records

Brief

NAA series M1148 compiles letters between External Affairs Minister R.G. Casey, CSIRO Radiophysics chief E.G. Bowen, the Australian Embassy in Paris, and Australia House in London. UK Scientific Adviser Sir Frederick Brundrett studied decades of saucer reports and found no sighting ever corroborated by an independent witness in a separate position, concluding reports derived from hallucination. France logged roughly 500 sightings in six weeks of late 1954, yet the Paris Embassy judged fewer than five percent defied conventional mechanical explanation. Against that diplomatic traffic, a RESTRICTED RAAF document from Williamtown detailed anomalous radar returns at 2800 MHz that moved against the wind and resisted every meteorological explanation.

Metadata

Agency

Royal Australian Air Force / National Archives of Australia

Release

1954-01-01

Type

PDF • .pdf

Length

43 pages

Classification

RESTRICTED / CONFIDENTIAL (varies by document)

Tags

radar anomaly, Williamtown RAAF, 2800 MHz GCA radar, French 1954 wave, electromagnetic propulsion theory, Australia, 1953–1955, no visual corroboration, moving against wind

Key points

• RAAF Williamtown detected strong radar echoes at 2800 MHz (GCA frequency) with no visible cloud formations; targets moved against the wind and showed internal motion on the Moving Target Indicator, yet aircraft vectored onto the area reported nothing unusual.p.4
• CSIRO Radiophysics chief E.G. Bowen dismissed Lt. Plantier's electromagnetic propulsion theory as an 'age-old fallacy' that 'violates all the physical laws as we know them,' while conceding a saucer-shaped craft was not theoretically impossible to build.p.3
• UK Scientific Adviser Sir Frederick Brundrett found that on no single occasion had a reported sighting been independently corroborated by a witness in a different position — a pattern he considered almost inconceivable given the volume of accumulated reports.p.6
• Brundrett concluded all saucer reports, 'even though emanating from many sane and responsible people,' were based on hallucination, but separately acknowledged that a saucer-type craft was a 'feasible mechanical proposition' and that naturally-occurring high-speed orbital bodies could not be entirely ruled out.p.7
• The Australian Embassy Paris reported France experienced approximately 500 UFO sightings between mid-September and late October 1954, including landing cases with figures described as 'little men in space suits, with ray guns,' before the wave became a national joke.p.9
• The Paris Embassy judged fewer than five percent of French UFO reports described machines that 'could absolutely not be accounted for by conventional mechanics.'p.10
• France established a special commission of enquiry into the more serious UFO reports, though its findings had not been made public as of December 1954.p.10
• Multiple aircraft were vectored onto the Williamtown radar phenomenon on several occasions; pilots reported nothing unusual and made landings through the anomaly without observing abnormal effects.p.4

Verbatim

• the period mid-September to late October of this year was an open season (about 500 reports)

  p.9

Most interesting

• The RAAF radar contacts at Williamtown moved against the wind and registered internal motion on the Moving Target Indicator — properties inconsistent with cloud, balloon, or dust — yet pilots dispatched to intercept saw nothing on multiple occasions.
• Brundrett raised the possibility that small natural satellites orbiting Earth at very high speed, normally invisible from the ground, might explain some reports — a conjecture he floated three years before Sputnik.
• The Paris Embassy reported that European UFO sightings had been recorded since the Middle Ages, with references in medieval chronicles cited as historical precedent.
• Brundrett compared a feasible saucer-type craft to an advanced development of the Rolls-Royce 'flying bedstead' — framing it as a potential solution to vertical take-off for supersonic aircraft rather than an extraterrestrial object.
• Minister Casey personally coordinated UFO intelligence across London, Paris, Canberra, and Sydney simultaneously, treating the subject as a legitimate diplomatic inquiry routed through official External Affairs channels.
• Both CSIRO's Bowen in Sydney and Brundrett in London independently dismissed the same electromagnetic propulsion theory advanced by French Air Force Lt. Plantier, without apparent coordination between the two assessments.
• The Paris Embassy distinguished two morphological classes in French reports — discs and cigars — and noted a theory that the cigar-shaped craft launched the disc-shaped ones, an early articulation of what later became a recurring UAP typology.