Alfa bow planes

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  • He Who Shall Not Be Named
    Moderator
    • Aug 2008
    • 12256

    #16
    Originally posted by Scott T
    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
    Who is John Galt?

    Comment

    • Scott T
      Commander
      • May 2009
      • 378

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

      Comment

      • george
        Captain
        • Dec 2010
        • 727

        #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

        • He Who Shall Not Be Named
          Moderator
          • Aug 2008
          • 12256

          #19
          Originally posted by george
          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
          Who is John Galt?

          Comment

          • george
            Captain
            • Dec 2010
            • 727

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

            Comment

            • He Who Shall Not Be Named
              Moderator
              • Aug 2008
              • 12256

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

              David
              Master/Blaster
              Who is John Galt?

              Comment

              • Scott T
                Commander
                • May 2009
                • 378

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

                Comment

                • Bob Gato
                  Captain
                  • Feb 2019
                  • 826

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

                  Comment

                  • He Who Shall Not Be Named
                    Moderator
                    • Aug 2008
                    • 12256

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

                    David
                    Who is John Galt?

                    Comment

                    • Scott T
                      Commander
                      • May 2009
                      • 378

                      #25
                      Wheel is still loose. Sketch attached.

                      Click image for larger version

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                      Attached Files

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                      • He Who Shall Not Be Named
                        Moderator
                        • Aug 2008
                        • 12256

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

                        Click image for larger version

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

                        David
                        Who is John Galt?

                        Comment

                        • trout
                          Admiral
                          • Jul 2011
                          • 3545

                          #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

                          • Bob Gato
                            Captain
                            • Feb 2019
                            • 826

                            #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

                            • george
                              Captain
                              • Dec 2010
                              • 727

                              #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

                              • type7
                                Lieutenant Commander
                                • Apr 2009
                                • 152

                                #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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