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Alfa bow planes

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  • #16
    Originally posted by Scott T View Post
    Thanks! Nice pictures of the mechanism.

    No Sketch off? :(

    My thought was a single actuating rod that moved forward and back for pitch control and rotation for extending the flippers (planes).
    The gear rotation would push the planes out with cranks on a crankshaft.
    When the planes were extended the rod would move forward and back to pitch the planes.
    The gear would un-mesh in the up and down position of the plane travel and would not retract till rod\planes came back to centered gear position.

    Click image for larger version

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    Bingo.

    David
    "... well, that takes care of Jorgenson's theory!"

    Comment


    • #17
      That was fun. I got a bingo. Thanks.

      Comment


      • #18
        Hi Scott T
        Any chance you could draw that out in darker ink? Also hard to read the writing. The image is not dark enough to be seen easily for me with glasses on.
        Also Thank You for stepping up with a design mechanism!!!!
        George

        Comment


        • #19
          Originally posted by george View Post
          Hi Scott T
          Any chance you could draw that out in darker ink? Also hard to read the writing. The image is not dark enough to be seen easily for me with glasses on.
          Also Thank You for stepping up with a design mechanism!!!!
          George
          That's right Scott! Hand it to him on a platter or you're not living up to you obligations here. You cad!

          No good deed goes unpunished.

          David
          The Slacker
          "... well, that takes care of Jorgenson's theory!"

          Comment


          • #20
            ouch! Tough to ask to see better, Wait till you youngsters get old and eyes act up!

            Comment


            • #21
              Originally posted by george View Post
              ouch! Tough to ask to see better, Wait till you youngsters get old and eyes act up!
              Welcome to Thunderdome.

              David
              Master/Blaster
              "... well, that takes care of Jorgenson's theory!"

              Comment


              • #22
                Maybe later. Wheels off the tractor needs a fix.

                Comment


                • #23
                  You picked a fine time to leave me loose wheel!

                  Comment


                  • #24
                    Originally posted by Bob Gato View Post
                    You picked a fine time to leave me loose wheel!
                    LOL! (Ellie had to explain it to me). Very good, Bob.

                    David
                    "... well, that takes care of Jorgenson's theory!"

                    Comment


                    • #25
                      Wheel is still loose. Sketch attached.

                      Click image for larger version

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                      Attached Files

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                      • #26
                        Originally posted by Scott T View Post
                        Wheel is still loose. Sketch attached.

                        Click image for larger version

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                        Beautiful, Scott. Clean, crisp, simple. KISS.

                        David
                        "... well, that takes care of Jorgenson's theory!"

                        Comment


                        • #27
                          Love your mind Scott!
                          If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.

                          Comment


                          • #28
                            Consider using a modified version of the Bob Martin/Ed Tordahl linear servo mechanism-this way you wont have to articulate the connecting rods..

                            Comment


                            • #29
                              Question about Bow planes support rods. I think the norm is to use 1/8" brass here in the West. Anyone have running experience with these? I was wondering IF because they are exposed with no support like the stern planes have. Has there been cases of shafts being bent while in normal use? IF so that would call for a thicker shaft if the bow planes are to be retractable and be able to be pivoting.
                              Your thoughts?

                              Comment


                              • #30
                                Yes the shafts of the bow planes get bent and sometimes the mounting gets torn loose of the bulkhead. The question is not if the shaft is strong enough but what do you want to give out when the bow plane strikes a hard object?

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