Scott Winton designed Sapphire ultralight, produced in 2 variants by J & P Heard, New South Wales.
Colin Winton, Queensland, produced Sportsman micro.
Yeoman Aircraft Pty Ltd formed 1958 as associate of Kingsford Smith to produce ag-aircraft, originally based on CA.6 Wackett, but production Cropmaster 250 was virtually new design.
Page 4 of 4