Can/Has anyone spun a rotor in stator under water?

[Robert Gift]

Q, you already have a nice siren.
If I could get a Q2, I'd keep it. I'd love to have one.

I presume a siren would produce shock waves under water even at low speeds.
When I spun my 2t22 with a stick from the bottom tube, I was able to get Tootie to growl her minor third interval.

[JasonC]

I presume a siren would produce shock waves under water even at low speeds.

Since water doesn't compress like air, it would be nearly impossible to create an underwater shock wave (unless you had one massive unit of energy). Even then, the turbulence and cavitation would destroy any output.

[Blasty]

The first sirens (which did work in water) were laboratory instruments for producing noise, and didn't operate like the sirens that we're thinking of. It was simply a perforated disk and a tube to blow a jet of air or water through it. These didn't have to suck water to work, it was fed to them.

[SoundOff]

http://www.youtube.com/watch?v=lyoPOK5cG6w

Water has too much resistance for the little motor on my flashlight-siren to run it fully submered though but I had it sucking water and air halfway out. It slowed to a growl.