The plane crashed killing one person and injuring 20 others with injuries ranging from minor to critical, according to Russel Meiring, a spokesman for paramedic company ER24.
The Aviodrome aviation museum responded on Facebook to the crash as follows: "We are extremely shocked that the Convair 340, the aircraft that would soon come to Aviodrome, crashed during the takeoff of a test flight in South Africa".
One person died in a plane crash in Wonderboom, Pretoria, July 10, 2018, emergency responders said.
Images showed a burning aircraft marked "Martin's Air Charter".
He said the pilot was in a critical condition following the crash.
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It had been due to fly to Aviodrome via east Africa, through Egypt, Croatia, Austria to the Netherlands.
It said the Convair was a US-built passenger plane that could carry 44 people.
Paramedic Xander Loubser from BestCare Ambulance Service confirmed the crash happened about 1km east of the N4 in Derdepoort and about 8km east of the Wonderboom Airport.
Paramedics are treating the patients and will thereafter transport them to nearby hospitals for further treatment.
South African Civil Aviation Authority spokesperson Kabelo Ledwaba said its investigators were at the scene and would issue a statement.