I know that you can buy them from places like JC Whitney and many of them come with their own little air compressor. It's a self contained unit. David was going to get one of them for the Eagle and didn't want to tie it into the coach's air system (crappy, wimpy horn) but we scrapped the Eagle. The BlueBird has a good horn, so I don't know if we will keep it or replace at some point down the road.
Thats the advantage of having an air system in the bus. You can hook up air horns and such without having to buy the compressor. I would think all you would need is the horns and a switch.
For the Eagle we had originally planned to "T" into the air bag system. We decided not to because we didn't want to risk a leak and have a "flat bag"! The air brake system was not even considered because we understood that if the air system was low, the air brakes applied. We also have air brakes on the Blue Bird. We would opt for a stand alone horn system.
I have had a 150dbl three trumpet horn just like you have shown for years and love it. We have never had a problem with air depletion and we have air brakes. Why wouldn't you pipe it in with your air brakes? Your air brake system has tons of cubic feet of air and a little use by the horn will never be noticed. My wipers are also air operated. I also installed a switch so I can use my regular horn or air horn or turn them both off so the kids won't blow our ears out by leaning on the horn when not wanted. Just tie into your main air system tank close to where your compressor ties in and not your brake system which is down stream from your main system. sportyrick
The air brake system was not even considered because we understood that if the air system was low, the air brakes applied. We also have air brakes on the Blue Bird. We would opt for a stand alone horn system.
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