Minimono Upgrade Drive Shaft DIY

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  • gyrotron
    Senior Member
    • Jul 2012
    • 481

    #16
    Originally posted by yoffer
    No problem, let me know if you have anymore questions. As far as cutting the flex shaft goes, I used a dremel with a cutting circle on it. I didn't solder the end that I cut as I didn't feel the need to but you could if you wanted to.

    Sent from my Desire HD using Tapatalk 2
    What is the overall length of the flex shaft?

    Comment

    • yoffer
      Junior Member
      • May 2012
      • 24

      #17
      I'm not sure, I just measured what needed from the stock wire drive and then I cut 2 inches more so I test fit it and from there I cut small sections off until it fit perfectly

      Sent from my Desire HD using Tapatalk 2
      AQ Motley Crew: Prather s220, Kintec Upgrade Flex Cable
      AQ SV27R: Octura x442, Kintec Flex Cable, Kintec Strut Bushing, 4s, Liposhield
      AQ Minimono: Octura y531, Custom .098 Flex Cable Drive

      Comment

      • Sobie2
        Junior Member
        • Sep 2012
        • 13

        #18
        What motor for upgraded minimono?

        I am upgrading my minimono with the .098 shaft, prop, and either the seaking 35a or 60a esc. The 60a esc can run 4s battery if I can find one that fits. Either esc and prop and driveshaft is $100. I am very new to the lipo thing. So I am looking for suggestions of an upgraded motor. Can the stocker run 4s? Or is there a drop in motor that is better than the stock one for 3s?

        I am interested in really spending less than $60 on a motor.

        Thx,
        Sobie2

        Comment

        • boogityman
          Member
          • Sep 2011
          • 40

          #19
          I'm fairly new to this game as well but from my experience working with the Mini Rio there's a fine line between fast & fun and fast & constantly flipping, so I would watch out with that combination. That said, I think you will have difficulty finding a 4s that fits... at least one that'll give you decent run times anyways. I cram a bigger 3s in there to be able to keep it out there longer so its a tradeoff. I have still yet to rebuild mine with this shaft upgrade but am considering using a 3200kv outrunner I have laying around, but that would give me 35k rpm unloaded so its on the higher end of things. If you managed to cram a 4s in there its my understanding that you wouldn't want to put much more than a 2200kv motor on there.

          Anyways just my 2 cents

          Comment

          • USMC247365
            Death Before Dishonor
            • Aug 2012
            • 3

            #20
            Awesome advise

            All, new to the boating world, last time I played with toys it was in the 80's. I have been doing alot of getting shot at and barely made it back home. I picked up RC's as a way of decompressing and it worked, but it is in depth to say the least. I bought the minimono and it striped the coupler and sucked as bad as you all said it did. I tried this drive upgrade and not only did it haul %ss but it is going to be my pet project. I also got my hands on a Spartan, I love the fact that you guys have answers for every situation, I am happy to be home, God Bless the US and RC I am obsessed. Please let me know tha best battery setup for the Spartan....

            Comment

            • USMC247365
              Death Before Dishonor
              • Aug 2012
              • 3

              #21
              I took advice and spent a little on upgrade ESc's and put the Lipo power behind it. I truely think that you have to listen to the posts, modify yours, and get some.... As I am a Combat Water Survival instructor I do swim after my flips... and I caught 2 pompanos last night and got diner and a movie..... You guys are AWESOME... Thankx again

              Comment

              • Mr Camil
                Junior Member
                • Jun 2011
                • 2

                #22
                Thinking about doing this but completely new to rc boats. What glue would you guys recommend?

                Comment

                • MiniMorris
                  Junior Member
                  • Dec 2012
                  • 23

                  #23
                  How did you drill out the tube holder? It seems there's no way to get a drill bit in there? Also, did you use just regular epoxy to secure the new tube? Thanks

                  Comment

                  • MAMBA2200
                    I need a scooby snack
                    • Jul 2012
                    • 1202

                    #24
                    Grab it with pliers and twist it back and forth it will break loose

                    Sent from my DROID RAZR using Tapatalk 2
                    Im Only Responsible For What I Say Not For What You Understand

                    Comment

                    • MiniMorris
                      Junior Member
                      • Dec 2012
                      • 23

                      #25
                      Originally posted by MAMBA2200
                      Grab it with pliers and twist it back and forth it will break loose

                      Sent from my DROID RAZR using Tapatalk 2
                      So you break out the tube holder, drill it, then glue it back in? What glue should I use?

                      Comment

                      • tlandauer
                        Fast Electric Addict!
                        • Apr 2011
                        • 5666

                        #26
                        MiniMoris,
                        Since you are getting excellent advice already, I am not trying to confuse the way you want to fix it, but in your other thread, you said the motor is not center/straight when run at low RPM, you mentioned vibration. To me it seems that there can be two issues, one is mis-alignment, the other is the motor is damaged, the shaft is not straight.
                        If the motor is good, you should be able to tell if it is aligned with the stuffing tube , the reason I ask is that you only mentioned about this observation when the motor is running.
                        IMO, a bit of mis-alignment would not cause vibration where as if the motor shaft is damaged/bent would cause some vibration. Granted it is unusual for a shaft to be "bent of out of shape" so to speak, may be that the motor wasn't assembled right to begin with. You also mensioned Not centered: are you saying the shaft doesn't look centered in relationship to the stuffing tube or it just doesn't look centered on the motor by itself?
                        I would examine all possible causes before doing surgery on the stuffing tube, this is just my opinion if I were faced with this problem, in no way am I putting other's advice down, this being the New Year, last thing I want is misunderstanding.
                        Cheers!
                        Too many boats, not enough time...

                        Comment

                        • tlandauer
                          Fast Electric Addict!
                          • Apr 2011
                          • 5666

                          #27
                          How is your coupler? is it machined correctly? These aluminum things are cheaply made, if itself is out of round, then you don't stand a chance.
                          Too many boats, not enough time...

                          Comment

                          • MiniMorris
                            Junior Member
                            • Dec 2012
                            • 23

                            #28
                            Originally posted by tlandauer
                            MiniMoris,
                            Since you are getting excellent advice already, I am not trying to confuse the way you want to fix it, but in your other thread, you said the motor is not center/straight when run at low RPM, you mentioned vibration. To me it seems that there can be two issues, one is mis-alignment, the other is the motor is damaged, the shaft is not straight.
                            If the motor is good, you should be able to tell if it is aligned with the stuffing tube , the reason I ask is that you only mentioned about this observation when the motor is running.
                            IMO, a bit of mis-alignment would not cause vibration where as if the motor shaft is damaged/bent would cause some vibration. Granted it is unusual for a shaft to be "bent of out of shape" so to speak, may be that the motor wasn't assembled right to begin with. You also mensioned Not centered: are you saying the shaft doesn't look centered in relationship to the stuffing tube or it just doesn't look centered on the motor by itself?
                            I would examine all possible causes before doing surgery on the stuffing tube, this is just my opinion if I were faced with this problem, in no way am I putting other's advice down, this being the New Year, last thing I want is misunderstanding.
                            Cheers!
                            Well, to clarify the motor shaft is straight it's when I put the coupler on motor, if you look at the end of the coupler where the prop shaft attaches you can tell, at low rpm, the coupler isn't on straight be because if you hold a nail against it, the nail will vibrate and bounce, where as it is smooth on the motor shaft side of the coupler. It looks as the motor shaft is straight inline with the stuffing tube. Also, the stuffing tube surgery is so I could use a flex shaft and not have to lose $20 in parts (a wire shaft, prop, prop nut.) everytime a grub screw backs out...... Which is every time it gets put in the water for me.

                            Comment

                            • MAMBA2200
                              I need a scooby snack
                              • Jul 2012
                              • 1202

                              #29
                              those stock couplers are made out of a very soft metal the set screws are junk i tossed mine never used it if you want it i will send it to you
                              Im Only Responsible For What I Say Not For What You Understand

                              Comment

                              • MiniMorris
                                Junior Member
                                • Dec 2012
                                • 23

                                #30
                                Originally posted by tlandauer
                                How is your coupler? is it machined correctly? These aluminum things are cheaply made, if itself is out of round, then you don't stand a chance.
                                Umm ... Well ima newb to the whole boat thing so I'm not sure, it looks alright?

                                Comment

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