Here is an enhanced Sound file for the P-51 D Rolls Royce Merlin engine for CFS 1. It includes Gear and Flap sound wavs. I've added a 5th level of sound for a smooth transition from Idle to WEP. It can be aliased for any Merlin engined aircraft within the Sim. It is my way of thanking those who have given so much to my enjoyment. Please backup your original Sound File within the P-51 Folder before use...Enjoy....