I got a ride in a DC3 back about 1970. It was a small puddle jumper airline flying the area around Kentucky. It was a night flight and I had a seat just to the rear of the engines. I sat fascinated watching the exhaust flare then point up as the misture and revs were set. The exhaust manifold glowed a pright cherry red as well under high power. I was sorry to see that flight come to an end, it was wonderful and the best commercial flight I've ever had.