The Harkness Hornet was a four-cylinder inline, water-cooled aircraft engine produced in Australia in the 1920s.
It used a cylinder bank from a Hispano-Suiza 8 attached to a crankcase of local design.
With a bore of 4.72 in (120 mm) and a stroke of 5.12 in (130 mm), power was 115 hp (86 kW) at 2,000 rpm.
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