The DC-6B is widely seen to be the best piston engined aircraft of the 1950s, bringing a reliability not seen in the later DC-7 and efficiencies that the competing Constellations couldn't match. However on shorter routes it was no match for the turboprop Viscount and by the end of the decade it was obsolete in comparison to the larger turboprops and early jets. So just how was it that TAA became a new DC-6 operator in the 1960s?
Gunn, John. Contested Skies: Trans-Australian Airlines 1946-1992
Checkout AussieAirliners.com for detailed operational histories of the DC-6s