I have been doing some investigation. I have found that even the glider that comes with FS2004 is void of external wind sound and the FSX glider sound pack is also void of any external sounds. This got me to thinking...which hurt my head greatly: There can be no external wind sound on a glider for the following reasons.
1) The Wind section of the sound config file does not work with flag settings. Flag 1 is internal, flag 2 is external. Without the ability to have the external flag for the Wind, there can be no external wind sound.
2) The only sections of the sound config file that properly work with flags, as far as I know, are related to the engine, touch down and ground roll. Gliders don't have engines, so they can not have external sounds via the normal engine parts of the config file. Touch down only works on touch down. And ground roll only works during take off and landing rolls.
I have a possible work around...but it's going to take some serious work to get this work around to work...just typing this sentence seemed to take a lot of work as well.
In order to have external wind sounds on a glider, it must be given an air file and aircraft.cfg file that gives it a motor. A very small, very low power motor with an ittsy bittsy, inky dinky prop. It could be a one cylider engine, producing 2 horsepower and equipped with a 1 foot prop with very minimal pitch. This dinky motor would not propel the aircraft, it would still basically be a powerless glider...but since the glider would now have a motor, a sound pack could be produced that would use wind sounds at the different RPM ranges. Really it would only take one wind sound that could be played at all RPM ranges and the engine could be left at idle all the time. With the glider now being a motorized aircraft, it could be equipped with internal and external wind sounds through the combustion call lines of the sound config file.
Now...I am not a flight dynamics guy. I have gotten lucky every now and then, but most of my attempts at tweaking air and config files, as they relate to the flight dynamics, have met with utter disaster. So, if someone who has the skill and know how to produce a set of flight dynamics that would give a glider a miniscule motor while leaving the free fall (glide) performance of the glider intact, I can put together a sound pack to give the glider internal and external flight sounds.
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