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Kootenay Lake Sternwheeler Build

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  • quote:


    Originally posted by JeffB


    Thanks Bob,

    I see what you are asking when I look at the pictures I posted. The stern does sit in the water although she did have a shallow hull so there wasn't much in the water.

    I have a question for anyone who can answer: are the arms to the paddle wheel from the engine in phase, i.e. at the same position as the wheel turns or are they at 180 degrees like the pedals of a bicycle?

    Thanks for your help with this.

    Jeff


    I would say at 180 degrees, the torque would be too much otherwise. It is like the rods on a steam engine. I hope that is the right answer that your seeking.

    Love that wheel. Looks great.

    Tony
    Tony Burgess

    Exploring the unknown requires tolerating uncertainty.~ Brian Greene

    Comment


    • Jeff,

      First class scratch building. Excellent job on the paddle wheels. I could use your technique to build my future waterwheel.

      Comment


      • I don't know a lot about sternwheelers, but I would say that the arms should be quartered at 90° (about). Since it they are quartered at 180°, and accidentally stopped when both are horizontal, the force applied to the wheels will have no non radial component to make them start to move. If they are quartered at 90°, at least one of the arms acts in such a way the wheel will start to turn.

        Comment


        • Jeff, I know nothing about boats and even less about paddle boats, but your model building work looks impressive to me.

          George
          Flying is the 2nd greatest thrill known to man. Landing is the first.

          Comment


          • Sad, the wheels no longer go round an round. But things are shaping up.
            Frank

            Comment


            • Thanks, Glen, Tony, Collin, Frederic, George, and Frank. I appreciate your comments.

              As for the positioning of the crank arms, I looked at a number of references as well as your input. As I weigh the evidence, I would say that they were quartered for the reason that Frederic mentioned, to ensure that at least one arm is not completely horizontal so there is always a vector of the force causing movement. If I have it right, aren't you a mathematician, Frederic? I also have some photos of the Keno, a sternwheeler on display in Dawson City, Yukon Territory that confirm this.

              Tony, this may be useful for you. I downloaded the instruction manual for the C.R. Lamb and I note that the crank arms are shown in the same position at 0 degrees to each other.

              That's what I learned today.

              Jeff

              Comment


              • Indeed, Jeff, I am...

                Comment



                • I positioned the crank arms on my CR Lamb at 90 deg to each other.

                  Don't see how it would work otherwise.

                  John Elwood

                  Comment


                  • Thank you, John. I think you are right, the research I have done would support this. Sorry for the delayed response, I have been rather busy lately.

                    The shipyard has been rather quiet lately but I have managed some progress. I am now beginning to put together the paddle wheel assembly. The first order of business is to fashion the mounting blocks (pillow blocks?)for the wheel itself. I used styrene after my first attempt with wood broke apart during the trial fit.

                    Here is the trial fit with the styrene blocks:



                    Just for fun I thought I'd see how it would look if I placed the cover over it:



                    It's not perfect but I think it will pass the three foot rule.

                    Jeff

                    Comment


                    • Jeff,with each new piece that you add,it just keeps getting better & better!

                      Nice work there laddy!

                      Greg Shinnie

                      Comment


                      • Jeff, WOW!! That looks great. You are giving me the itch to start another ship model.

                        Bob
                        http://www.railroad-line.com/forum/topic.asp?TOPIC_ID=30102

                        http://www.railroad-line.com/forum/topic.asp?TOPIC_ID=51837

                        Comment


                        • Looks great to me! Never mind three-foot, that'll pass the three-inch rule.

                          Comment


                          • Jeff, I’m trying not to be a nit-picker but I think the paddle boards are on the wrong side of the, for the lack of the proper term, the arms. As it looks to me when the wheel is in forward motion the water pressure would try to rip the paddle board off the arm.

                            Is it possible to do a 180 on the wheel so that the boards would face the water?



                            Frank

                            Comment


                            • Thank you, Greg, Bob, Ray, and Frank.

                              Frank, you know when you are building something and always thinking ahead, "when I get to... I need to remember to attach the part facing the right direction."? :erm: :erm:

                              Fortunately, I used CA to glue it and I have a bottle of uncure. It is now corrected:



                              I think it may have been a Saturday morning job after the night before. I had quite a discussion with my foreman about it.

                              Thank you for pointing that out to me before I went any further. I really appreciate it.

                              By the way, I had a chance to watch the Trainmasters TV video on the Sundance Central. Every time I see pictures of it I am amazed. I enjoyed hearing the discussion by your group. Some day I hope I can see the Sundance Central and the Suncoast Center in person.

                              Jeff

                              Comment


                              • Jeff, glad I could help. When you get to the Tampa area just give me a PM and we'll go over to the Center for a private tour.
                                Frank

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