airbazar wrote:What about the A346?
Nope. It put most of its payload capability into getting its own bulk out of there; though being a quad helped.
To give you an idea of the relative inefficiency: at MTOW (which neither aircraft could realistically reach out of JNB) the A346 was 100tonnes heavier than the A359s offering similar capacity today! (I'm fairly certain that SA's were not the -HGW version, and thus mostly limited to ~365tonnes, but not 100% sure.)
SA briefly opped the A346 on the eastbound ATL-JNB nonstop, but never westbound. They eventually decided to stop both ways, to maximize payload, and continued doing so after the flight was moved to the shorter IAD route.