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  • Doug Smock
    Moderator
    • Apr 2007
    • 5272

    #16
    Nice, are you getting used to the boat or is it pulling right, or both?
    MODEL BOAT RACER
    IMPBA President
    District 13 Director 2011- present
    IMPBA National Records Director 2009-2019
    IMPBA 19887L CD
    NAMBA 1169

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    • tlandauer
      Fast Electric Addict!
      • Apr 2011
      • 5666

      #17
      Originally posted by Doug Smock
      Nice, are you getting used to the boat or is it pulling right, or both?

      Thanks, it is BOTH, but my terrible driving is making the turns awful now that I am looking at it with more objective eyes! Another reason why I don't race, I still want friends in the FE community!
      Too many boats, not enough time...

      Comment

      • martin
        Fast Electric Addict!
        • Aug 2010
        • 2887

        #18
        Originally posted by Doug Smock
        Nice, are you getting used to the boat or is it pulling right, or both?
        Doug do you use any tow in on the front of the right sponson (turn fin sponson) to prevent pull to the right or other methods. Thanks.

        Comment

        • tlandauer
          Fast Electric Addict!
          • Apr 2011
          • 5666

          #19
          Originally posted by martin
          Doug do you use any tow in on the front of the right sponson (turn fin sponson) to prevent pull to the right or other methods. Thanks.
          Would love to learn and hear any input / advice!
          Too many boats, not enough time...

          Comment

          • Doug Smock
            Moderator
            • Apr 2007
            • 5272

            #20
            Originally posted by martin
            Doug do you use any tow in on the front of the right sponson (turn fin sponson) to prevent pull to the right or other methods. Thanks.
            I have tried that and while it does help I have had more success putting a shim behind the right side of the strut on the boats that needed it.

            A few other things to check.

            Make sure that the strut is dead nuts level with the bottom of the tub. There are some struts with some negative built in. IME the boats don't like it, just like they don't like lifting props.

            Make sure you have enough rudder. I just went over a boat for a gentleman that had the rudder mounted too high. The boat pulled right hard (prop walk) and didn't want to come out of a turn.

            The JAE turn fin needs to be sharp and dead level with the top of the tub looking across the tub from the left side.
            It has been reported that sharpening it on both sides helps although I haven't tried it.

            CG too far forward. 60/40 rule or approx. EDIT >13.25". Error on the side of more weight on the tail.

            Of course the prop needs to be sharp and thin.

            If all of that checks out experiment with shims being sure to maintain a level strut.

            Hope this helps.
            Jim's JAE finished! 003.jpg
            Last edited by Doug Smock; 06-21-2014, 06:39 PM. Reason: error
            MODEL BOAT RACER
            IMPBA President
            District 13 Director 2011- present
            IMPBA National Records Director 2009-2019
            IMPBA 19887L CD
            NAMBA 1169

            Comment

            • martin
              Fast Electric Addict!
              • Aug 2010
              • 2887

              #21
              Originally posted by Doug Smock
              I have tried that and while it does help I have had more success putting a shim behind the right side of the strut on the boats that needed it.

              A few other things to check.

              Make sure that the strut is dead nuts level with the bottom of the tub. There are some struts with some negative built in. IME the boats don't like it, just like they don't like lifting props.

              Make sure you have enough rudder. I just went over a boat for a gentleman that had the rudder mounted too high. The boat pulled right hard (prop walk) and didn't want to come out of a turn.

              The JAE turn fin needs to be sharp and dead level with the top of the tub looking across the tub from the left side.
              It has been reported that sharpening it on both sides helps although I haven't tried it.

              CG too far forward. 60/40 rule or approx. 14". Error on the side of more weight on the tail.

              Of course the prop needs to be sharp and thin.

              If all of that checks out experiment with shims being sure to maintain a level strut.

              Hope this helps.
              [ATTACH=CONFIG]117051[/ATTACH]
              Doug is the 14" from the rear of tub or from the rear of ski. Also where is the cg in relation to the turn fin ie back of fin, centre of fin etc Thanks.

              Comment

              • tlandauer
                Fast Electric Addict!
                • Apr 2011
                • 5666

                #22
                Originally posted by Doug Smock
                I have tried that and while it does help I have had more success putting a shim behind the right side of the strut on the boats that needed it.

                A few other things to check.

                Make sure that the strut is dead nuts level with the bottom of the tub. There are some struts with some negative built in. IME the boats don't like it, just like they don't like lifting props.

                Make sure you have enough rudder. I just went over a boat for a gentleman that had the rudder mounted too high. The boat pulled right hard (prop walk) and didn't want to come out of a turn.

                The JAE turn fin needs to be sharp and dead level with the top of the tub looking across the tub from the left side.
                It has been reported that sharpening it on both sides helps although I haven't tried it.

                CG too far forward. 60/40 rule or approx. 14". Error on the side of more weight on the tail.

                Of course the prop needs to be sharp and thin.

                If all of that checks out experiment with shims being sure to maintain a level strut.

                Hope this helps.
                [ATTACH=CONFIG]117051[/ATTACH]
                Thank you for taking your time , sir! especially today!
                I can see already a few things which I need to go over. I have the gas strut, bottom is level with tub, but 1mm above the inner tub surface? Will try to move down .
                Rudder is def. mounted TOO high.
                CG measurement: if anything, mine is less than 14" from the transom?? Tail heavy...
                Too many boats, not enough time...

                Comment

                • Doug Smock
                  Moderator
                  • Apr 2007
                  • 5272

                  #23
                  Originally posted by tlandauer
                  Thank you for taking your time , sir! especially today!
                  I can see already a few things which I need to go over. I have the gas strut, bottom is level with tub, but 1mm above the inner tub surface? Will try to move down .
                  Rudder is def. mounted TOO high.
                  CG measurement: if anything, mine is less than 14" from the transom?? Tail heavy...
                  Originally posted by martin
                  Doug is the 14" from the rear of tub or from the rear of ski. Also where is the cg in relation to the turn fin ie back of fin, centre of fin etc Thanks.
                  Sorry fellas I went by memory and should have known better than that. I posted in error and edited my original post.
                  I just pulled a boat out to check. The CG is 13.25" from the back of the tub. That should put it very close to the center of the bottom of the turn fin.
                  The Zippkits turn fin is in the center of the mounting holes. (left to right)
                  Don't stress about them being a little tail heavy if that's the case unless they are dragging the tails.

                  Sorry about the error.
                  MODEL BOAT RACER
                  IMPBA President
                  District 13 Director 2011- present
                  IMPBA National Records Director 2009-2019
                  IMPBA 19887L CD
                  NAMBA 1169

                  Comment

                  • tlandauer
                    Fast Electric Addict!
                    • Apr 2011
                    • 5666

                    #24
                    Thank you again very much! This has been VERY educational for me !
                    Too many boats, not enough time...

                    Comment

                    • Doug Smock
                      Moderator
                      • Apr 2007
                      • 5272

                      #25
                      Glad to help. Good luck, these are great boats!
                      MODEL BOAT RACER
                      IMPBA President
                      District 13 Director 2011- present
                      IMPBA National Records Director 2009-2019
                      IMPBA 19887L CD
                      NAMBA 1169

                      Comment

                      • revoltrunner
                        Senior Member
                        • May 2014
                        • 646

                        #26
                        Hi Tim
                        I just watched some of your you tube videos.
                        good stuff. I have a vac u pickle coming tomorrow
                        and after seeing your video I'm glad I bought it.

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                        • JimClark
                          Fast Electric Addict!
                          • Apr 2007
                          • 5907

                          #27
                          And now you have more to get running and video
                          "Our society strives to avoid any possibility of offending anyone except God.
                          Billy Graham

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                          • tlandauer
                            Fast Electric Addict!
                            • Apr 2011
                            • 5666

                            #28
                            Originally posted by revoltrunner
                            Hi Tim
                            I just watched some of your you tube videos.
                            good stuff. I have a vac u pickle coming tomorrow
                            and after seeing your video I'm glad I bought it.
                            Thank you!
                            I am glad you got one too, I love mine. The boat is on the smaller side but you would never guess that if you see how stable she runs. It is lightweight and really goes well with the Aqua Craft UL-1 motor. Look forward to seeing your vid.

                            Originally posted by JimClark
                            And now you have more to get running and video
                            Yes, Sir, more running and more video , with less storage space .
                            Too many boats, not enough time...

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                            • tlandauer
                              Fast Electric Addict!
                              • Apr 2011
                              • 5666

                              #29
                              Update: I put a TP motor, 3640 6D ( 2460kv) in my Zippkits JAE 21 FE with a Swordfish Pro+220A-6s, running with a H7 prop prep'd by Dasboata, speed jumped to 69.6mph.
                              DSCN1469.jpg
                              Too many boats, not enough time...

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                              • tlandauer
                                Fast Electric Addict!
                                • Apr 2011
                                • 5666

                                #30
                                PT30 Stealth Hydro and H&M Viper Turbine Miss Elam, latest acquisition

                                These two hydros rock! Thanks to Jim Clark and Paul Pachmayer
                                DSCN1532.jpgDSCN1527 (2).jpgDSCN1535.jpgDSCN1536.jpg
                                DSCN1526 (2).jpg
                                Seaking 180A ESC V2, TPPower motor 3640 7D 2100kv, M445. Straight out of the shipping box, minor tuning ahead, of course.
                                Too many boats, not enough time...

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