Later-Model Dumas Scarab 38KV > AVS Build

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  • Jesse J
    scale FE racer
    • Aug 2008
    • 7116

    #46
    Well? Did she float?
    "Look good doin' it"
    See the fleet

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    • Mike W
      Senior Member
      • May 2018
      • 348

      #47
      She ripped herself apart. My fault trusting Loctite should have used epoxy. Will rebond the drive assemblies.
      Last edited by Mike W; 06-30-2019, 10:36 AM.
      Otto RC Marine

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      • Mike W
        Senior Member
        • May 2018
        • 348

        #48
        OK it's been 3 weeks without a club meet but the repair was simple. First successful maiden video for your entertainment below. Apparently outward-rotating props are not the ticket. I default to outward always because it makes more sense in my head, but the result seemed to be the opposite of what I expected?? When one prop cavitated with turn input the hull literally torque rolled almost out of the water! Funny to watch enjoy!

        The second run was much better after some trim changes and inward-rotating props. It did 67 on GPS but was getting hairy. The myth that some hulls simply will not perform beyond a certain level may in fact be true, but I'm stubborn enough to have to learn most things the hard way. Unfortunately I did not get video of the second run. Next time!

        Otto RC Marine

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        • fweasel
          master of some
          • Jul 2016
          • 4285

          #49
          Ha, nice save on the front straight. That thing looked like a handful with the outward spinning props.
          Vac-U-Tug Jr (13mph)

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          • bogieboy
            Senior Member
            • Jun 2018
            • 219

            #50
            very nice looking boat! and yeah, looks to be a bit sketchy yet....LOL

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            • Mike W
              Senior Member
              • May 2018
              • 348

              #51
              Much better attitude now with drives up and more rear CG. Maybe need to go back a little? More power than driver guts too. But a nasty hook despite careful turns. Any tips?

              Otto RC Marine

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              • bogieboy
                Senior Member
                • Jun 2018
                • 219

                #52
                getting closer. i cant remember, are you running any turn fins? if not, i would start there...

                Comment

                • Mike W
                  Senior Member
                  • May 2018
                  • 348

                  #53
                  I am. Will lower them. I know this rear blowout is a characteristic of stepped hulls. I was also told that props outward is most common with twin vees? Will try that again too.
                  Otto RC Marine

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                  • srislash
                    Not there yet
                    • Mar 2011
                    • 7673

                    #54
                    Originally posted by Mike W
                    Much better attitude now with drives up and more rear CG. Maybe need to go back a little? More power than driver guts too. But a nasty hook despite careful turns. Any tips?

                    https://youtu.be/_3nH66Y5MNY
                    Any updates Mike? This is steerable drives right? I have been playing with them for a bit now and did get some fixes.

                    Comment

                    • Mike W
                      Senior Member
                      • May 2018
                      • 348

                      #55
                      No I really wanted to try steerable but did not. I’m focusing on my 1.2M cat at the moment will message you.
                      Otto RC Marine

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                      • stac1627
                        Member
                        • Sep 2014
                        • 47

                        #56
                        Nice works Mike!
                        South Jersey Vice

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