Nothing like reviving a really old thread and a bit of a tangent to the OP, but having searched the forums for creating whistles with fins, this seemed to have the most information so I thought instead of starting a new thread, Id post in this one so that things already said dont have to be said again.
I think it was the second club launch my daughters and I attended. There was a large hawk that was launched with whistling easily audible the entire flight. Since then, the musician part of me wanted to experiment. Ive got several other kits and a min diam scratch Im currently working on, so this is strictly in brain storming stage right now. I get, for the most part, the basics of what makes the whistle in a split fin. But does anybody know what might have the most effect on the pitch of the whistle? Is it the length of the leading edge of the fins, the fin thickness, the distance of the split, and/or something all together different?
Would the air flow/speed coming from a small (say 2 or 10 gallon) air compressor be sufficient to experiment with? If I used the right attachment, could I use the compressor to push air past the fins to see if a configuration whistles and what pitch might be generated? Im thinking that it takes three (or more) notes to make a chord and rockets have three (or more) fins
Or am I just completely off my rocker?