In my previous post, I discussed a mysterious aeroplane seen over Hobart in 1938 which was interpreted in a context of concern about vulnerability to air attack. I said that by contrast a similar incident that year over Darwin was seen as a curiosity rather than a threat, but in looking at it more closely I find that the threat element was present in the press accounts more than I thought. Let's see if there's any discernable pattern.
There were actually two aeroplanes seen (and heard) over Darwin, or perhaps the same aeroplane was seen (and heard) on two different occasions.
Last Thursday evening [3 February] two men saw a machine fly over Darwin at a great height heading south. One of the men is employed at the aerodrome and it is considered unlikely that he could have made a mistake. Another man who is an aviation engineer also heard the drone of an engine and stated emphatically that it was an aeroplane engine.
The other sighting was initially a hearing. A foreman at Darwin's electrical power plant by the name of Maurice Holtze quite ingeniously used the sound of the plant's diesel engines as a sound detector:
This engine develops about 1000 revolutions at normal speed, and Holtze observed that the presence of any other machine in the vicinity developing more or less than 1000 revolutions is reflected clearly in the exhaust beat of the power house engine. At 4.30 a.m. yesterday [8 February] he was attending the engine when he noticed a distinct change in the note of the exhaust. Accustomed to the departure of air mail planes from the local aerodrome about 5 o'clock on three mornings of the week he at first paid little attention to the antics of his unofficial sound detector. Then he realised suddenly that no machines were scheduled to leave Darwin on Tuesday morning. He rushed outside and saw a machine in the air.
Holtze couldn't make out any identification marks on the aeroplane, but said that he could see the glow from the cockpit lights; it appeared to be a large, multi-engined machine. Apparently inbound from the Timor Sea, it circled over Darwin and then flew south. A former superintendent of police named Lovegrove also heard an aeroplane at 4.30am, while a post office employee saw 'strange lights moving across the sky [...] similar to those shown by aircraft'. The government was informed of these reports, and while Canberra appeared sceptical it ordered local representatives of the Civil Air Board and the defence forces to investigate.
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