The engine and wind sounds were taken from actual recordings of a passing 109. I once did this sound pack using original recordings from WWII. Those old WWII recordings were scratchy and was really lacking on the bass. This new and improved sound pack was made from a recording found at this website:
http://www.bf109.com This eng sound was made throatier for use on my fav aircraft the Bf109G-10
Also in this pack are beefier cannon sounds and a nice sounding stall horn.
Not yet finished are the hydrolic gear and the hand operated flaps.
You can download Wraith's Bf109G-10 sound pack from here:
Wraith's Bf109G-10 sound packBest if used with Mitsu's sound collection.
http://park1.wakwak.com/~mitsu/ah2_stuff/msc_202full.zip Wraith's 109 sound pack is a self extracting file so there is no fuss unless you changed the default placement of the Aces High folder. Simply unzip and enjoy.