I read a solicitation in "Jessee's Corner" for stories from the good old days of flying the line. I was hired in '77 at North Central that is as you know Delta now. I started my career on the CV 580 which is an old airframe - Convair 340/440 with newer engines, Alison 501-D13's. Not sure if the request would fall into that area, but if so I can spin a yarn or two that might get your adrenaline flowing. While the situations happened in the Convair, they DO apply to DC-6/7 and other beautiful round engine types.