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Having trouble with pneumatic prop...

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  • Having trouble with pneumatic prop...

    I ordered the small-pop up from frightprops.com and bought a 17 gallon 150psi compressor at lowes last night. Started trying to hook it all up today and it didnt seem like it had enough power to go up, even when I set it to 145psi. Doug at frightprops said that 135psi would do just fine, but it didnt. I did have a mask and small foam torso on the prop when I tried this, but even when I took it off the bars only moved alittle bit.

    Any Ideas?

    Thanks,
    Drew
    Drew and Shane
    www.deadenddungeon.com

  • #2
    Is there a flow control valve somewhere in the line? If so it may need to be opened more.

    The valve looks like this http://www.gearseds.com/curriculum/i...flow_valve.jpg
    Ken Darrigo
    ClearCut Operations, Inc.
    ClearCut Operations | http://www.clearcutoperations.com
    TerrorDome Haunted Scream Park | http://www.terrordome.com

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    • #3
      135 PSI! That's crazy. I have never built a prop that operates over 60, and my 8' animatronic http://evilusions.com/shop/product_i...oducts_id=1067 runs at 45 psi.

      I agree, there should be flow controls either on the solenoid valve, or mounted on the cylinder, that will probably need adjusted out to allow the air to flow fast enough to move the cylinder. Once it moves at the speed desired, reduce the psi to the lowest setting you can, it will reduce wear and tear on your prop, and your air compressor.
      Brian Warner
      Owner of Evilusions www.EVILUSIONS.com
      Technical Director of Forsaken Haunted House www.Forsakenhaunt.com
      Mechanical Designer (animatronics) at Gore Galore www.Gore-Galore.com

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      • #4
        I built a prop to lift me (210 pounds) straight up at a high rate of speed and it only took about 60 pounds of air pressure to do this.
        The piston might have had a 3 inch diameter, this was the trick. The unit was originally designed to lift the elderly up out of a bathtub using mere faucet water under pressure probably never exceeding 100 max.
        Always more than one way to do something.
        hauntedravensgrin.com

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        • #5
          What diameter air line are you feeding the prop with? You need the largest you can get to avoid pressure loss, also, try adding a small air tank at the point of the prop if the compressor is far away from it.
          Listen to them, Children of the night. Oh what music they make.

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          • #6
            This hose is 1/4 inch. I finally got it working with the mask and torso at about 60 psi..
            yay!
            Drew and Shane
            www.deadenddungeon.com

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