Powered by a Cheetah radial. At the time of the conversion there was an abundance of Cheetah engines available in the Australia taken from war surplus Airspeed Oxfords and Avro Ansons. The engines were meant to over come heating problems with the standard Lycoming flat six. Only two converted as EP-9C.

Owned by Tonair and fitted with a Cheetah 10 radial in 1960. There were plenty of these engines around after war surplus Airspeed Oxfords were refused approval for civil use. VH-SSX was damaged in a grass fire ignited by a car exhaust while parked in a paddock near Keith, South Australia, on April 11, 1967. Struck off register.