Scott,
Thanks for that, I was thinking something might be loose. I wish I could post the video!
Don't know if all sound like it, but it's a well-known whistle sound.
Only some do...... for unknown reason.
My bad.....First time I've uploaded. I was just clicking all the buttons! Now sorted!An age-restricted video. They want me to "sign in" to open it.
Like no way!
Dave
Do you/we gain the requisite coolness-factor 3-5kts of speed per dB of whistle, like painting your wings or tail checkerboard does?