Originally Posted by
Self loading bear
I was also not able to find it.
Even with the hints 1995 and Australian.
With pronounced distortions at 90,180 and 270 degrees and a two bladed propeller the sound must indeed have been distinctive.
I now found some more about it:
Aeropedia
Thanks SLB. I am intrigued to know how the rear fuselage was attached to the main structure.