We heard on a recent TV documentary that the Aboriginal man on our $50 note crossed two boomerangs and mounted them on a shaft.
He spun the shaft between his hands, and the device rose, as does a helicopter.
More of his milestones are listed on the following link:
https://www.sbs.com.au/nitv/the-point/a ... /u2dx054gn
The helicopter principle
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The helicopter principle
Cheers, Mike.
Perspective determines interpretation.
http://airspeedsflyingvisit.threadwings ... index.html
Perspective determines interpretation.
http://airspeedsflyingvisit.threadwings ... index.html
