My new to me Genesis

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  • paDDY
    Senior Member
    • Aug 2014
    • 127

    #31
    I installed the hatch bolts last night. What a pain that was! I got the esc programmed and hoping for a water test/ shake down this weekend.
    IMG_4361.jpg
    Attached Files

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    • paDDY
      Senior Member
      • Aug 2014
      • 127

      #32
      IMG_4364.jpg

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      • fweasel
        master of some
        • Jul 2016
        • 4282

        #33
        looks familiar!
        Vac-U-Tug Jr (13mph)

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        • paDDY
          Senior Member
          • Aug 2014
          • 127

          #34
          Originally posted by fweasel
          looks familiar!
          Thank you for the help and answering my questions on this build.

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          • paDDY
            Senior Member
            • Aug 2014
            • 127

            #35
            A little update, I took the boat out for its maiden run yesterday. I was only able to get 57 mph on two separate runs, and I changed props and batteries on both runs and still 57 mph. The best way to describe the boat at full trigger was it was surging in power. I could hear the rpm's surging at full trigger. I brought the boat in after two full trigger passes and one of the two batteries (Zees 7000 120c ) puffed. I stuck another set fully charge 3s 6000mah Zees 120c, a dashaboat prop off a similar size cat, and 57 mph again. I only did one run as it was surging at full trigger again. I think the batteries don't have enough juice for this setup?

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            • fweasel
              master of some
              • Jul 2016
              • 4282

              #36
              Look at the data logs from the ESC and see how many amps it was pulling. If something is wrong, the ESC may be be going into a current limiting mode. Puffing a battery on a maiden run is not good, even cheap batteries. Did you check temperatures on motor, esc, batteries, and connectors after the run?
              Vac-U-Tug Jr (13mph)

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              • Bande1
                Senior Member
                • Mar 2023
                • 684

                #37
                Originally posted by paDDY
                A little update, I took the boat out for its maiden run yesterday. I was only able to get 57 mph on two separate runs, and I changed props and batteries on both runs and still 57 mph. The best way to describe the boat at full trigger was it was surging in power. I could hear the rpm's surging at full trigger. I brought the boat in after two full trigger passes and one of the two batteries (Zees 7000 120c ) puffed. I stuck another set fully charge 3s 6000mah Zees 120c, a dashaboat prop off a similar size cat, and 57 mph again. I only did one run as it was surging at full trigger again. I think the batteries don't have enough juice for this setup?

                the way a battery puffs is if you pull the voltage below 3.0v to 3.2v. try to recharge it. often the swell will go down. You NEED data logging. stop and if your ESC doesnt have it you to hyperion-world and order an Emeter2. see my thread about it.

                my 41" cat pulls 5500-6000w to 57-58mph. You might be wildly underestimating what your system can do. I said in this thread earlier them batteries are good for like 150A. thats like 3000w. on a cat this size thats like 50mph (my guestimate). so 57mph and a puffed pack + LVC would make sense. you are probably pulling 4000w at least, over 200A.

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                • paDDY
                  Senior Member
                  • Aug 2014
                  • 127

                  #38
                  I pulled a few of these pics off the app. I’m not sure what I’m looking. But I am going to make an order tonight for some smc batteries.

                  E190B279-5ACD-4A35-86D3-C0D4E02BB14D.jpg
                  4B9342DE-217B-4DE9-9F29-D1AEA0AC6DC2.jpg
                  D2A334E0-A86E-4860-B8B5-26AD6367D045.jpg
                  A4254006-A2E5-4903-9149-B49E5AB3C520.jpg

                  Comment

                  • Bande1
                    Senior Member
                    • Mar 2023
                    • 684

                    #39
                    yeah youre hitting LVC. prop down. your expectations for speed are too high. the SMC's will go a bit longer before they too drop below 3.2v per cell. I would still prop down at least 3-5mm total pitch.

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                    • paDDY
                      Senior Member
                      • Aug 2014
                      • 127

                      #40
                      Originally posted by Bande1
                      yeah youre hitting LVC. prop down. your expectations for speed are too high. the SMC's will go a bit longer before they too drop below 3.2v per cell. I would still prop down at least 3-5mm total pitch.
                      Sounds good. I?ll prop down and see what the new batteries do and report back.

                      Comment

                      • LibertyMKiii
                        Senior Member
                        • Dec 2018
                        • 127

                        #41
                        Originally posted by paDDY
                        I pulled a few of these pics off the app. I?m not sure what I?m looking. But I am going to make an order tonight for some smc batteries.

                        [ATTACH=CONFIG]177752[/ATTACH]
                        Wow that voltage sag is insane! Quality LiPos will make a world of difference.
                        Looking forward to your experience after putting SMCs in there.

                        I would say in general on 6s if you are dipping below 18v under heavy load (and have quality batteries) that you need to reduce the load (reduce the prop) or work on tuning the boat to run better.

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                        • paDDY
                          Senior Member
                          • Aug 2014
                          • 127

                          #42
                          Originally posted by LibertyMKiii
                          Wow that voltage sag is insane! Quality LiPos will make a world of difference.
                          Looking forward to your experience after putting SMCs in there.

                          I would say in general on 6s if you are dipping below 18v under heavy load (and have quality batteries) that you need to reduce the load (reduce the prop) or work on tuning the boat to run better.
                          Sounds good. I am waiting for my SMC order to come in (Friday), and will report the results.

                          Comment

                          • paDDY
                            Senior Member
                            • Aug 2014
                            • 127

                            #43
                            Got the smc 3s batteries with dasha prop 1715 and did 71mph. Put a 1815 I balanced and sharpened and 72 mph. Temps were 135 on motor and esc didn’t break a sweat. The boat still needs some tuning, but was too hot to hang at the lake.

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                            • Bande1
                              Senior Member
                              • Mar 2023
                              • 684

                              #44
                              Originally posted by paDDY
                              Got the smc 3s batteries with dasha prop 1715 and did 71mph. Put a 1815 I balanced and sharpened and 72 mph. Temps were 135 on motor and esc didn’t break a sweat. The boat still needs some tuning, but was too hot to hang at the lake.
                              nice! can try playing with lower timing see if temps come down. how long was the run when you hit 135f? I run a 1715 too and its a great prop.

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                              • paDDY
                                Senior Member
                                • Aug 2014
                                • 127

                                #45
                                Originally posted by Bande1
                                nice! can try playing with lower timing see if temps come down. how long was the run when you hit 135f? I run a 1715 too and its a great prop.
                                I ran it about 2 min tops. Does the speed sound about right?

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