The Australian $50 note features David Unaipon, a Ngarrindjeri man from South Australia. He was a preacher, inventor, writer, and public intellectual. He appears on the note in recognition of his contribution to Australian intellectual, cultural, and scientific life.
David Unaipon was the first Aboriginal Australian to be widely published in English and one of the earliest Aboriginal thinkers to engage publicly with science, theology, literature, and political debate.
David Unaipon (Ngarrindjeri)
David Ngunaitponi Unaipon was born on 28 September 1872 at Point McLeay Mission, now Raukkan, on the banks of Lake Alexandrina in South Australia. He was a member of the Portaulun branch of the Ngarrindjeri people and a speaker of the Yaraldi language. His parents, James Unaipon and Nymbulda Ngunaitponi, were both Ngarrindjeri, and his father was a preacher and writer.
Unaipon was educated at the Point McLeay Mission School and quickly became known for his intelligence. At the age of thirteen, he left school to work in Adelaide, where his employer encouraged his interests in literature, philosophy, science, and music. Throughout his life, he remained largely self taught.
Why David Unaipon Appears on the $50 Note
David Unaipon appears on the $50 note because of his role as an Aboriginal intellectual at a time when Aboriginal people were largely excluded from public, academic, and political life. He lectured widely, published extensively, and argued that Aboriginal knowledge systems were rational, complex, and compatible with modern society.
His inclusion recognises intellectual contribution rather than political office, military service, or economic power.
David Unaipon as an Inventor
Unaipon spent much of his life working on mechanical ideas. Between 1910 and 1944, he lodged provisional patent applications for at least nineteen inventions. These included mechanical motion devices, a centrifugal motor, propulsion systems, and conceptual designs inspired by the aerodynamics of the boomerang.
One of his most significant inventions was an improved mechanical motion device that converted rotary motion into reciprocating movement. This mechanism became the basis of modern mechanical sheep shears. The technology was later introduced commercially without Unaipon receiving financial return or lasting recognition.
He also spent many years attempting to design a perpetual motion machine and continued this work into old age. Although these efforts were unsuccessful, they demonstrate the breadth of his mechanical thinking.
David Unaipon as a Writer and Public Speaker
Unaipon was the first Aboriginal Australian to publish written work in English. His first article, “Aboriginals: Their Traditions and Customs,” was published in 1924. He went on to publish numerous articles and several booklets retelling Aboriginal stories, as well as writing on science, religion, and Aboriginal rights.
He travelled widely as a lecturer, speaking to audiences across Australia about Aboriginal culture, belief systems, and self determination. His public speaking brought him into contact with government officials, academics, and advocacy groups, though his views sometimes conflicted with other Aboriginal leaders of the time.
Some of Unaipon’s traditional stories were later published under the name of a non Indigenous anthropologist without his consent. These works were eventually restored to him as the original author.
David Unaipon and Aboriginal Self Determination
Unaipon supported Aboriginal self determination and was involved in inquiries into Aboriginal welfare, including the 1928 Bleakley Inquiry. He lobbied for federal responsibility for Aboriginal affairs and proposed structural reforms to replace the office of Chief Protector of Aborigines.
He believed Aboriginal people should be represented as capable, educated, and equal participants in Australian society. His approach emphasised persuasion and intellectual engagement rather than protest, a stance that placed him at odds with some contemporaries.
When Did David Unaipon Appear on the $50 Note?
David Unaipon first appeared on the Australian $50 polymer banknote in 1995. A redesigned version issued in 2018 enhanced visual references to his Ngarrindjeri identity, including imagery connected to Raukkan and his mechanical work.
Is David Unaipon on Any Other Australian Currency?
No. David Unaipon does not appear on the Australian $2 coin.
The Aboriginal man depicted on the $2 coin is Gwoya Tjungurrayi, also known as One Pound Jimmy, a Warlpiri Anmatyerr man from Central Australia. The two figures are frequently confused but are different individuals from different regions and histories.
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