I'm not sure what you have going on. If it's labeled "wind" and is in a stuka (ju87,ju87d3?)folder in the sounds directory, it should work looped. Unfortunately, If it's a problem with the loop sounding odd, you'll have to fix that yourself in an audio proggy. Basically you just want to snip a few milliseconds of audio out and make sure it has a consistent pitch. That will make it have the same tone / pitch as you dive in it.