1. #1
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    Default Grover 1510 Airhorns: Direct Drive vs. Air Tank

    Hey guys,

    I'm working on sorting out some specs for an emergency vehicle we're planning on installing an airhorn on. The vehicle doesn't already have a compressor on it (no airbrakes).

    I called Grover to ask about their opinion on the matter. They suggested using their "1507 Kit", which has a 1510 horn and a 1556 direct-drive compressor at 25 psi. The alternative is to install a 130 psi compressor with 5-gallon air tank. They said that the direct-drive is nicer because there are no concerns with it ever running out of air from continuous blasts.

    My concern is with the quality of the sound and the volume. Obviously, 25 psi from the direct drive is much lower than the 130 psi from the tank, which I would expect to have a very significant difference in tone and volume. Do any of you have experience with the direct-drive systems?

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    My experience is that direct-drive air horns blow. (You knew it was coming. Pardon the pun.)

    Seriously, they wear out quickly and sound like cats being strangled for a long time until the compressor finally schits the bed and dies.

    Go the tank route.
    "Loyalty Above all Else. Except Honor."

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    Quote Originally Posted by FWDbuff View Post
    My experience is that direct-drive air horns blow. (You knew it was coming. Pardon the pun.)

    Seriously, they wear out quickly and sound like cats being strangled for a long time until the compressor finally schits the bed and dies.

    Go the tank route.
    I have to respectfully disagree with you here. Unfortunately the cats are probably louder. I agree with the rest of your assessment.

    Does this chassis have air seats? If so, there is already a compressor on it. They are more common than you think. To adapt to use air horns would require a storage tank (low cfm, on-demand compressor), check valves and the actuating system. Not the best solution but better that the direct drive models when used on fire apparatus.

    If you got the money, get an auto-air eject with a station compressor to charge the storage vessel.

    Just don't put those lame 12 volt air horns on a fire truck. Go the extra mile so you don't get flipped off by bicycler passing you on the right and laughing.

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    Quote Originally Posted by FWDbuff View Post
    My experience is that direct-drive air horns blow. (You knew it was coming. Pardon the pun.)

    Seriously, they wear out quickly and sound like cats being strangled for a long time until the compressor finally schits the bed and dies.

    Go the tank route.
    This. Get a higher pressure compressor. Also, look into a larger tank, or multiple tanks, to run the air horns longer. Plus the high pressure can be used for extra things like filling tires, inflating stuff, blowing dirty/dusty things off, etc.

    Also, Grover won't recommend it, but the 2040 is the loudest air horn (excluding trains and ships) that I can find. You can't supply the 2040 unless you have a serious compressor, like a air brake system would.
    The American people will never knowingly adopt Socialism. But under the name of 'liberalism' they will adopt every fragment of the Socialist program, until one day America will be a Socialist nation, without knowing how it happened. --Norman Mattoon Thomas, 6 time presidential candidate for the Socialist Party of America

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