Northeast DC-6
Although the Viscounts were jet-powered, they were long gone from the Northeast fleet (due to financial difficulty) at the time this DC-6B was shot in 1965.  It’s also noteworthy that of airline fleets that included both DC-6s and DC-7s, the DC-6s were often the last to be phased out, flying long after the newer 7s had been scrapped or sold.  The problem wasn't the DC-7 itself – it was the turbo-compound engines.  The over-simplified explanation of turbo compounding is that it’s a mechanical means of adding power by installing turbines in the exhaust flow, and then gearing those turbines back into the engine crankshaft.  The process surely did recover considerable power from the exhaust gases, but mechanical complexity was an unneeded by-product.  Reliability suffered and expensive maintenance problems arose making the older, but much more reliable 6s more attractive by comparison.

Northeast added the DC-6 to their fleet in 1957 to operate their new New York - Miami authority.  But by this time (8/65) the CV-880s had taken over that and the other Florida routes, and NE was using their DC-6s for service between Montreal, Portland, Boston, New York, Philadelphia and Washington, plus a limited number of local-service flights to cities like Bangor, Maine and Lebanon, NH, in which cases they were operated as First Class service.  Seen here is the early evening BOS-PHL-BOS turnaround shortly before heading back up to Boston.  The time for the trip was stated as 1hour + 20 minutes and the fare was $19.32.   Like most of the other DC-6s in the fleet, the company held on to this one until late 1967, by which time they had been replaced with Fairchild FH-227s.  This particular aircraft was later converted to a freighter – like so many others – and ended up in the hands of a Latin American operator who used it until sometime around 1980.

Thanks for helping with some of the missing details, Jon.

Philadelphia,  August, 1965