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Pop Pop engines

Home › Forums › All things floating › Pop Pop engines

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  • 4 September 2010 at 20:27 #3627
    StuartM
    Participant
      @stuartm

      Viable power plant

      4 September 2010 at 20:27 #28258
      StuartM
      Participant
        @stuartm
        Dare I mention them on here  or shall I lash myself to the ships wheel ready for the flogging.
        Just wondering whether or not anyone has managed to power a model with one (or two) rather than those little tin pressings
        Ta
        StuartM
        5 September 2010 at 00:01 #28259
        Colin Bishop
        Moderator
          @colinbishop34627
          Stuart.
           
          The subject is fairly well documented, see here: http://www.nmia.com/~vrbass/pop-pop/
           
          I don’t know if any of our members have built one though.
           
          Colin
          5 September 2010 at 07:44 #28263
          Bob Abell 2
          Participant
            @bobabell2
            Hello Stuart and Colin
             
            It was our Autumn regatta yesterday at Etherow
             
            This year`s Commodore`s Challenge was to construct a powered boat, which could steer a figure of eight course….without the use of an electric power source, but RC controlled
             
            Three boats entered……one clockwork……one lacky band…….and one, a home made Pop Pop drive and it worked well……..It ran for quite a while, compared to the other two motive powers
             
            Bob
            5 September 2010 at 16:36 #28266
            ashley needham
            Participant
              @ashleyneedham69188
              Nothing wrong with pop-pop`s.
               
              After all,how many craft do you see on the water powered by a jet engine??
               
              Ashley
              5 September 2010 at 17:50 #28269
              StuartM
              Participant
                @stuartm
                Thanks all,
                I’ve always been intigued by them.   Years ago I  built 2 small coiled tube ones powering 6 -8 inch craft, (slab of wood with a pointy bit)
                 I was wondering whether anyone had scaled  them up and run one  RC controlled in a large hull up to 3′ ish. 
                I might have a bash and see if I can power my launch with one. If it fails I’ll plug the holes and install conventional electric.
                 It will be an interseting winter project if nothing else.
                5 September 2010 at 19:00 #28271
                ashley needham
                Participant
                  @ashleyneedham69188
                  Interesting project, scaling up a pop pop.
                   
                  Hobbies sell pop  pops that look like upright boilers and they say 2 of them will power a craft of the size contemplated.
                   
                  I think you would need a lot of extra heat to scale up one of these engines and then materials would become an issue.  Perhaps you could make a multiple chamber/coil unit , thus having in effect 3 “engines” as one unit to give more power without making the actual units themselves much bigger?
                   
                  Ashley
                  5 September 2010 at 19:54 #28273
                  StuartM
                  Participant
                    @stuartm
                    I’ve seen that one in Hobbies.
                     I might try multiple coil units encased in a single large diameter tube, with a gas burner as a controlable heat source and play around with tube diameters.
                    Watch this space .
                    Stuart M
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