By the way, there's a note in the installation text file that the sound is DC-3 engines, and recommends a few Constellation sound files to look for on other FS sites. I have the CalClassic L-049 Constellation, and copied that sound into the new L-749. Sounds like the real thing. It also looks great and flies great. Liveries are Eastern Air Lines, TWA, KLM, Air France, and USAF.
What's lovely is that a friend of mine, Jaap de B, has done the repaint for this wonderful beast in the KLM colours of our (Aviodrome aircraft museam in the Netherlands) last still flying example in the world and it flies just like her. Found a great sound that brings the virtual experience close to reality. Just miss the virtual smells of burning oil .Nice job by Manfred Jahn and his team. And it's FREEWARE for all to enjoy.