C-124 Globemaster
WBZ1:
Bill. look at post #34. "C-54" was used to describe a Canadian operated plane, we both knew it was not "Donald's Dog."
The C-54/DC-4 was admitted by Douglas Aircraft to be nothing more than an enlarged and higher powered DC-3, the DC-6 was what the DC-4 would have been if there had been more time for design/development of the '4. The DC-4 was rushed into production to fill an urgent need of the time.
But. The DC-4 did use a radio operator/navigator in the third crew seat for over-water flights. And in airliner service the CAA (later FAA) required a flight engineer on four engined planes. Or maybe it was union rules.
Then when Don and the boys had the time, out popped what I consider to be the ultimate piston airliner, the DC-7.
I would have liked to see your zero-timed '-4.
Power the DC-3 with four; it's still the same, only more.
Bill.
PS: Another way to differentiate the -4 and -6 was the cabin windows. The -4, with no cabin presure had squared windows, the pressurized -6 windows were rounded. I just remembered that. wr