What engines did the DC-6 have?
As I recall, th experiments with rear facing seats were the first couple of rows. I was on a Trident (don't know which version) from LHR~HAM in the mid-70s and was aske to fill out a questionnaire on the read facing seats. They were fine and, as we know, much safer. Naturally, humas like to face forward and, naturally,
PR departments don't like to talk about prangs - so we don't have rear facing saeats.