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Any feedback on size of a boat and size of the engine ?

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  • Xavier LUCAS
    Hi guys, I was wondering if some of you which have already built or are in possesion of a pop boat can tell me the weight, size of the boat and the size and
    Message 1 of 4 , Oct 15, 2007
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      Hi guys,

      I was wondering if some of you which have already built or are in
      possesion of a pop boat can tell me the weight, size of the boat and
      the size and design of the engine. I am starting thinking about my
      future little boat and even if I know that I will have to builb
      something very light, I would appreciate to get more information on
      the ration size/weigth of a baot, size of the pop pop engine and also
      how it sail.

      For myself, I assume that I will have to built my hull in Balsa and
      use some mini tiny servo as I am planing to use a radio in this tiny
      boat !

      Thanks in advance.

      Xavier
    • Jean-Yves Renaud
      Hi Xavier, Should you need a very big engine, look at eclecticspace.net/doc. There are two (big) videos. With Loïc we have tested two big engines. The first
      Message 2 of 4 , Oct 16, 2007
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        Hi Xavier,
        Should you need a very big engine, look at eclecticspace.net/doc.
        There are two (big) videos. With Loïc we have tested two big engines.
        The first one (mine) with a pipe ID of 23.5mm. And the second one
        (Loïc's) with pipe diameter 40mm and length 3m. The biggest engine we
        have ever heard about. And it works.
        Jean-Yves

        --- In pop-pop-steamboats@yahoogroups.com, "Xavier LUCAS"
        <lucas.xav@...> wrote:
        >
        > Hi guys,
        >
        > I was wondering if some of you which have already built or are in
        > possesion of a pop boat can tell me the weight, size of the boat and
        > the size and design of the engine. I am starting thinking about my
        > future little boat and even if I know that I will have to builb
        > something very light, I would appreciate to get more information on
        > the ration size/weigth of a baot, size of the pop pop engine and
        also
        > how it sail.
        >
        > For myself, I assume that I will have to built my hull in Balsa and
        > use some mini tiny servo as I am planing to use a radio in this tiny
        > boat !
        >
        > Thanks in advance.
        >
        > Xavier
        >
      • Xavier LUCAS
        Hello Jean Yves, How was your summer ? Not funny report about a trip in the US this summer ? Thanks for your comments, I browse again eclectispace web site
        Message 3 of 4 , Oct 16, 2007
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          Hello Jean Yves,

          How was your summer ? Not funny report about a trip in the US this
          summer ?

          Thanks for your comments, I browse again eclectispace web site again
          last week end and I enjoy the information. You can be sure that I will
          try to test my boat to get more informations on my engine this winter
          in the bath tube.

          I don't think that I will need a 40 mm pipe to do the engine. I will
          probably use a 8 mm pipe or what I will find here which is similar. I
          found some cheap balsa sheet and strip this afternoon so I will built
          the hull as light as possible, I will also use some mini servo and
          receiver and some "light" battery. For the heat source, I will try
          some "methanol" gel found in a hobby shope here and also probably I
          will try some alcool.

          I was very interesting this weekend by one of your article concerning
          the reduction of the exhaust pipe to get more propultion. I am not
          specialist in thermodynamic (even if I major in chemical engeniring)
          but do you think that I can use a 2 inch 6 mm exhaust pipe link to my
          8 mm pipe without any problem.

          I also appreciate some information concerning the lenght of the pipe
          outside the hull to get a better efficienty !!!

          Well first of I need as much information as possible to figure out
          what I am going to do and then I will try to build the hull. My major
          problem for the moment is to get an heavy boat which can not be run by
          the pop pop.

          Have a nice day

          Xavier
        • Jean-Yves Renaud
          Hi Xavier. Answers in blue on your message ... should get a thrust of 80mN. ... thrust, the best way is not to use a cylindrical nozzle, but a conical one. ...
          Message 4 of 4 , Oct 17, 2007
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            Hi Xavier.

            Answers in blue on your message

            > How was your summer ? Not funny report about a trip in the US this
            > summer ? Summer in Greece and French Riviera. No funny report.
            >
            > I don't think that I will need a 40 mm pipe to do the engine. I will
            > probably use a 8 mm pipe or what I will find here which is similar. I
            > found some cheap balsa sheet and strip this afternoon so I will built
            > the hull as light as possible, I will also use some mini servo and
            > receiver and some "light" battery. For the heat source, I will try
            > some "methanol" gel found in a hobby shope here and also probably I
            > will try some alcool.  Once optimized, with 2 pipes of ID 8mm you should get a thrust of 80mN.
            >
            > I was very interesting this weekend by one of your article concerning
            > the reduction of the exhaust pipe to get more propultion. I am not
            > specialist in thermodynamic (even if I major in chemical engeniring)
            > but do you think that I can use a 2 inch 6 mm exhaust pipe link to my
            > 8 mm pipe without any problem. Though it could improve slightly the thrust, the best way is not to use a cylindrical nozzle, but a conical one.
            >
            > Well first of I need as much information as possible to figure out
            > what I am going to do and then I will try to build the hull. My major
            > problem for the moment is to get an heavy boat which can not be run by
            > the pop pop. I like such a project. I had a 45 foot sail boat for 24 years. Now I have only a small Norwegian boat...and less worries.
            >
            > Have a nice day. Same to you. For me, today should be mainly used to test a 8 pipe engine. I started this morning. It works fine but I expect to increase the thrust.

            Jean-Yves

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