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Working fire monitor

Home › Forums › All things floating › Working fire monitor

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  • 25 August 2014 at 13:53 #51530
    DOUGLAS BUSHELL
    Participant
      @douglasbushell19364

      Hi I am making a fire boat with a working ire monitor.

      I have a pump which has a working voltage from 6v to 9v. The problem I have it only has a range of about 18-24". I have seen other models with 3 monitors working they seem to have a range 3-4 feet. What am I doing wrong??

      My pump is working at max volts (9v) on Nicads.

      Can any one help?/

      Many thanks Doug.

      25 August 2014 at 13:53 #4142
      DOUGLAS BUSHELL
      Participant
        @douglasbushell19364
        25 August 2014 at 14:02 #51531
        Dave Milbourn
        Participant
          @davemilbourn48782

          Douglas
          A Graupner #1951 12v pump will throw a jet of water in excess of five metres. If you are unable to increase the voltage or change the pump for a more powerful one then the only other solution is to reduce the internal diameter of the monitor to increase the pressure at the tip. Do make sure you have an in-line filter in the pump inlet tube – a model aircraft fuel filter is fine – and clean it through regularly.
          Dave M

          25 August 2014 at 18:51 #51547
          DOUGLAS BUSHELL
          Participant
            @douglasbushell19364

            Hi Dave thanks for the advice, I think try the cheaper option , reduce the size of monitor.

            I have a small lathe so I will be able to make a nozzle to reduce the size.

            Doug

            31 August 2014 at 21:57 #51761
            Andy Hustler
            Participant
              @andyhustler32076

              Doug as i know nowt about electrics have you tried a water pump from a windscreen washer

              1 September 2014 at 00:07 #51764
              Charles Oates
              Participant
                @charlesoates31738

                I’ve tried this, a good cheap option.
                IF it’s only used for short
                bursts, like you would in the car, and you keep it below the waterline to keep it primed, and you can get one cheaply, say, from the scrap yard.
                Worked for me for years.
                Best to put an in line filter in the intake, these are used in many cars too.

                1 September 2014 at 10:29 #51768
                CookieOld
                Participant
                  @cookieold

                  Doug , I bought a brand new Lucus car windscreen washer pump off Ebay for £4.50 for motor cooling ,it is self primeing so you can put it were ever you want . I have tried it with some 5mm bore pipe and it sprays the water a good 2 MTRS , but it is 12v

                  Cookie

                  1 September 2014 at 12:38 #51769
                  DOUGLAS BUSHELL
                  Participant
                    @douglasbushell19364

                    Thanks Andy , I think I have fixed it by make a nozzle & squeezing in the end to form flat end ,it now goes about 15 feet.

                    Thanks Doug.

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