"Orange Cat" build 2013 - Fast and Reliable

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  • cugino
    Senior Member
    • Nov 2008
    • 136

    #46
    ClearCoat

    Back from paintshop again with three layers of clearcoat:

    DSCN8929.jpgDSCN8930.jpg

    You can also notice set of NEU motors almost prepared to install. I thing they fits good. I was warried about bigger diameter of the cooling jacket. There is no much space left, i tried to install motors as low as possible.
    Last edited by cugino; 06-09-2013, 05:46 AM.
    -= MHZ Shockwave - MHZ Micro Fountain - MHZ Cougar 2 - "Orange cat" =-
    http://olaf.webz.cz

    Comment

    • cugino
      Senior Member
      • Nov 2008
      • 136

      #47
      I soldered 22 joints, it took much more time then i originaly exptected. I hope, thet my new precise CNC 8 screw couplers will be good enough.

      Few more photos:

      DSCN8944.jpgDSCN8946.jpgDSCN8948.jpgDSCN8953.jpg
      Last edited by cugino; 06-19-2013, 11:21 AM.
      -= MHZ Shockwave - MHZ Micro Fountain - MHZ Cougar 2 - "Orange cat" =-
      http://olaf.webz.cz

      Comment

      • cugino
        Senior Member
        • Nov 2008
        • 136

        #48
        Today i assembled boat, with hope of making first tests on my favorite lake. Unfortunately, i wasnt successful. I found out, that previous china motor failed and took one of the ESC to hell. I have to wait until hobbyking restock ESCs and then order one for installation.

        One of the ESCs worked correctly and was able to ensure myself, that new configuration of wiredrive system works as intended. No vibrations at all, i am particulary happy. :-)

        When i will receive new ESC, i am going to modify both ESCs adding new low ESR capacitor. I dont trust at all set of 4 capacitors added by manufacturer. Maybe, this modification is useless, because of oversizing of ESCs. I have seen these ESCs working in much bigger catamarans such as HPR 135 or Mystic 138. I expect amp draw below 100amp per motor continuous with peaks about 140amp per motor.
        -= MHZ Shockwave - MHZ Micro Fountain - MHZ Cougar 2 - "Orange cat" =-
        http://olaf.webz.cz

        Comment

        • cugino
          Senior Member
          • Nov 2008
          • 136

          #49
          Hello folks,

          i finaly tested my cat. I took very long time, because one of the NEU motors was dead on arrival. One of the soft cables was terribly wrong soledered to wires of solenoids. I carefully resoldered and it seem it works quite well. I have to measure motor performance on bench to make sure.

          I have to modify NEU motors, there are no axial distances on driveshaft and it makes backplate of motors to go off.

          Here is video from my first test. It is short, just for bughunting of the boat.

          -= MHZ Shockwave - MHZ Micro Fountain - MHZ Cougar 2 - "Orange cat" =-
          http://olaf.webz.cz

          Comment

          • cugino
            Senior Member
            • Nov 2008
            • 136

            #50
            I have to modify my NEUs to work with my wiredrives.

            All bearings on my 1415/1Y (2009) are probably glued on drive shaft. I have to make room for axial shift inside of motor. Well, i have to pull off all the bearings from the shaft.

            Do you anyone know safe way to take of bearings? I would like to avoid demaging bearing or shaft aswell.
            Last edited by cugino; 09-17-2013, 03:28 AM.
            -= MHZ Shockwave - MHZ Micro Fountain - MHZ Cougar 2 - "Orange cat" =-
            http://olaf.webz.cz

            Comment

            • cugino
              Senior Member
              • Nov 2008
              • 136

              #51
              I noticed on video, the rooster tail is very high. Is it ok? I thing the rooster tail should be more narrower, right?
              -= MHZ Shockwave - MHZ Micro Fountain - MHZ Cougar 2 - "Orange cat" =-
              http://olaf.webz.cz

              Comment

              • grsboats
                Senior Member
                • Jul 2012
                • 975

                #52
                Yes add some cup to the blades to lower the rootertail and gain some speed. boat looks great. Gill
                GO FAST AND TURN RIGHT !
                www.grsboats.com.br

                Comment

                • cugino
                  Senior Member
                  • Nov 2008
                  • 136

                  #53
                  Thank you for reply,

                  is it possible to cup CNC alu props without breaking the tips?
                  -= MHZ Shockwave - MHZ Micro Fountain - MHZ Cougar 2 - "Orange cat" =-
                  http://olaf.webz.cz

                  Comment

                  • grsboats
                    Senior Member
                    • Jul 2012
                    • 975

                    #54
                    I wouldn't do it with CNC props despite I have repaired some with extreme care.Gill
                    GO FAST AND TURN RIGHT !
                    www.grsboats.com.br

                    Comment

                    • cugino
                      Senior Member
                      • Nov 2008
                      • 136

                      #55
                      I wouldnt do it either. U saved me props, thank you for reply.
                      -= MHZ Shockwave - MHZ Micro Fountain - MHZ Cougar 2 - "Orange cat" =-
                      http://olaf.webz.cz

                      Comment

                      • Cooper
                        Fast Electric Addict!
                        • Jan 2011
                        • 1141

                        #56
                        I've cupped aluminum props with good success. I think the key is to carefully pound the shape. Any sharp edge in the bending process can result in a stressed area. Nothing extreme, and I did not anneal or treat before of after. If re shaping the whole blade, I would think a failure would be likely.

                        Comment

                        • cugino
                          Senior Member
                          • Nov 2008
                          • 136

                          #57
                          Hello,

                          what type of bearing do you use. I used PbPTFE bearings that last only about 10 cycles. I have good experience with ball bearing, but they dont fit to my stingers.

                          I already doubled bearing on prop side, i hope it will extend life time. Will see.
                          -= MHZ Shockwave - MHZ Micro Fountain - MHZ Cougar 2 - "Orange cat" =-
                          http://olaf.webz.cz

                          Comment

                          • grsboats
                            Senior Member
                            • Jul 2012
                            • 975

                            #58
                            Try to fit a pair of 3/16 lead teflon bushing to replace the ball bearings if possible .I have used this system for years and they last long.Gill
                            GO FAST AND TURN RIGHT !
                            www.grsboats.com.br

                            Comment

                            • cugino
                              Senior Member
                              • Nov 2008
                              • 136

                              #59
                              I actualy use lead teflon (PbPTFE) bushing, that last only few cycles at my RPM. I dont know, what is RPM limit for LeadTeflon bushing. I use 2200KV on 6S, its about 48000 RPM, maybe to much for Lead Teflon.

                              I used to drive Ball bearing in my other mono setup with similar RPMs with no problems.
                              -= MHZ Shockwave - MHZ Micro Fountain - MHZ Cougar 2 - "Orange cat" =-
                              http://olaf.webz.cz

                              Comment

                              • cugino
                                Senior Member
                                • Nov 2008
                                • 136

                                #60
                                I did some test this week. She drives well, but i found some issues i have to solve. One of the motor heats up more then the second one. Difference is quite big to accept it. One of the motor has 26 degrees Celsius and second one 35 degrees. It points on problem in cooling or motor itself.

                                What is your tipical temperature difference in your twin setups?

                                DSCN9119_resize.jpg
                                -= MHZ Shockwave - MHZ Micro Fountain - MHZ Cougar 2 - "Orange cat" =-
                                http://olaf.webz.cz

                                Comment

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