Originally Posted by William Karsten
It's too bad I'm not rich. If I were, I'd get a custom framed bike, have the top tube welded shut at each end, and made air tight. I'd tap it with a valve and fill it with liquid CO2 to run a horn like this.
I'm thinkin of one, if only the horn didn't look so freakin goofy.
Cheaper alternative would be to use the CO2 cartridges that are readily available. You could possible fashion a tire inflator into a lighter alternative
than the water bottle air tank. However, the 600-800 psi of liquid CO2 would be a safety concern.