Steyr has been building aircraft engines almost from day one. See main text.

- More recently, a two-cylinder aircraft engine based on the 650cc Steyr-Puch TR1 car engine can be seen at the Graz Aeronautical Museum.

“Steyr-Puch TR1“

“Steyr-Puch TR1, cutaway”

“Steyr-Puch TR1, schematic drawing“