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  • 1945dave
    Senior Member
    • Mar 2012
    • 304

    #46
    Maciek, centerline alignment for the strut is not as big a deal as you might think. However, if it is off center I would rather it be to the right side of the boat over the left side as you look at the transom. Still the thrust angle is of more importance. Question. If your shaft tube is off center where does the problem start. I mean is the hole through the bottom off center too? Is the strut bracket mounted off center on the transom? Consider adding a small shim to angle the strut thrust slightly to the left. This would compensate for the countersteer situation.

    YOu know if your intention is to run and have fun then these little fine points are not that important. If on the other hand you are like many guys on this forum, like my friend Jim Marcum, it is all about the details and making everything as close to perfect as possible. I have torn the stuffing box out of the bottom of the hull of the boat and started over because it was 3 mm off center. Regarding the Genesis, it seems the engine placement and the shaft angle through the boat is determined by some stock off the shelf motor mounting bracket. I have seen several Genesis boats with the strut tube dropping below the riding surfaces of the sponsons as it sits on a table. That means the stuffing tube is constantly hitting the water and causing drag (loss of speed) and perhaps even worse causing handling issues needing countering steering for example. So understand ready to run factory setup boats are not always setup correctly. There does seem to be a few guys that have recieved a factory setup Genesis that for whatever reasons are better setup than others. Like I have said on this forum before, I have only seen 6 or 7 factory setup Genesis boats and it has been a mixed bag of consistency. Motor placement has varied by perhaps 8 mm forward and rearward and some stuffing tubes are bent differently as well. There is only one way to get near perfection and buying a factory setup boat is probably not the best way. Still, perfection is not needed unless you demand it. Some of us do and some of us don't. FUN is the name of this game. Have FUN. For some of us old farts we like to consider "craftsmenship" as a term describing how we pay attention to details. I am not lucky enough to get by on luck. <smile>.

    Dave
    Last edited by 1945dave; 07-05-2012, 02:12 PM.

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    • JIM MARCUM
      Senior Member
      • Jun 2011
      • 773

      #47
      Originally posted by 1945dave
      YOu know if your intention is to run and have fun then these little fine points are not that important. If on the other hand you are like many guys on this forum, like my friend Jim Marcum, it is all about the details and making everything as close to perfect as possible. I have torn the stuffing box out of the bottom of the hull of the boat and started over because it was 3 mm off center. <smile>.

      Dave
      Thanks for the kind words Dave. My wife tells me that I am a perfectionist - "TO A FAULT". Can't argue with that.

      JIM
      JIM MARCUM: NAMBA 777; EX? SoCal FE Racers Club; D-19; Official 2012 NAMBA FE Nationals Rescue Diver; Purple Heart Viet Nam Vet; Professional SCUBA/HOOKA Diver, KELCO, 1973-1978; BBA 1978, Magna Cum Laude; MBA 1980 w/honors; Retired DOD GS1102-12 Contract Specialist

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      • Maciek74
        Member
        • Jun 2012
        • 48

        #48
        Thanks for the advice Dave, now iam having some fun with this boat but probably untill i install telemetry, then speed race will start and ill fous on details... :) anyways can U give me some links to galeries where i can learn couple tips about building Genesis by experienced builders? :)

        Maciek

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        • paultbg
          Senior Member
          • Mar 2012
          • 103

          #49
          Hello again,
          I have a new problem with my Genesis. During 6-7 minutes of running is pushing all the marine grease out of the tube (on motor side).
          After the first run, I change the batteries and can run it for 1 mire minutes than is starting to make a odd noise because the flex is not lubricated anymore.
          I mention that I still run the stock drive line just without the liner.I do not mind to grease the cable after one day but remove the motor & grease after each 6 min run?
          The odd part is that it start happening just recent,until now all was ok. What am I doing wrong here? Thanks

          Comment

          • iamandrew
            Senior Member
            • Jul 2010
            • 577

            #50
            it shouldnt be twisting the grease up the flex shaft to the motor :S
            really sounds like the wind is around the wrong way !

            Comment

            • 1945dave
              Senior Member
              • Mar 2012
              • 304

              #51
              I agree that it sounds like the cable wind is reversed but this is not unusal and I doubt that the wind is backwards. Sounds like the water driving up the shaft log from being forced up by the drive dog pulse and the water pressure running up the nose cone on the strut. Put a oiece of heat shrink covering the nose cone and make sure the drive dog washer is smaller than the strut.DSC_0375.jpgDSC_0376.jpgDSC_0379.jpgDSC_0380.jpg

              Comment

              • paultbg
                Senior Member
                • Mar 2012
                • 103

                #52
                Hello
                Thanks for your advices.The wind is not the wrong way, that's for sure.
                It is the original one.About the water, it could be.I will check again tonight at the pond, i have the feeling that I have left too much space before the drive dog.
                I have the heat shrink applied over the tube and strut but not the one on motor side.
                I really need to try that one too.
                Below is a short movie with the fun ride from last night.
                Regards

                Comment

                • 1945dave
                  Senior Member
                  • Mar 2012
                  • 304

                  #53
                  Paul. Good Video. You can learn a lot by watching a video. Perhaps under a new thread I would like to learn more about the camera and how you mounted it. Good Job.

                  Did you notice the small very noticable vertical spray separate from the rearward rooster tail? That is from water hitting and being directed upward from that small 1/8th inch gap between the transom mounting bracket and the forward edge of the strut. Two things about that. First it causes a small amount of lost speed. Important? That depends on how important maximum speed is to you. Second, in my case it also helped funnel water into my hull via the mounting bolts which over time wallowed a little bit as the strut and strut bracket rocked on the rounded surface of the transom (I posted this situation in a different post). Anyway, dab a little RTV (silicon rubber sealant) around all edges of the bracket and fill the hole forward of the strut and shoot the video again.

                  Regarding the 4 photos I sent about showing the steps I took trying to eliminate water from getting up the stuffing tube. I also drilled a small relief hole forward of the strut bearing but behind the nose cone and heat shrink tubing, clearly visable in the photos. This allows water pressure that otherwise would be driven with force up the shaft tube forcing out grease to escape out the side of the strut. This helps too.

                  Dave

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                  • Maciek74
                    Member
                    • Jun 2012
                    • 48

                    #54
                    Here are some photos of my todays work with cooling, was searching long time for some photos of how to install this intake, then decided to take a risk and install it how i think it is suposed to be, please be gentle...

                    IMAG0020.jpgIMAG0021.jpgIMAG0022.jpgIMAG0023.jpgIMAG0024.jpg

                    Comment

                    • keithbradley
                      Fast Electric Addict!
                      • Jul 2010
                      • 3663

                      #55
                      Originally posted by Rob DeAngelis
                      Just ordered the Genesis.... Planning on building a saw racer out of it... Anything I should know? other than its a narrow hull???? planning a leopard 4082 and something in the 120 amp area...
                      It depends how you're using the term "SAW". Do you really want a boat that will set a record, or are you jsut interested in making some fast straight-line passes?
                      www.keithbradleyboats.com

                      Comment

                      • 1945dave
                        Senior Member
                        • Mar 2012
                        • 304

                        #56
                        Okay, looks pretty good to me. A couple of things. If your goal is more water cooling this should provide that. You are correct that is about all you can do with those dual scoups. My concern for this however is that you have added more drag to the bottom of the boat which translates as some penalty in speed. Very much? I am not sure. But more drag means less speed period. Were you not able to get the proper water cooling from the rudder? Also, previously you said the flex shaft/stuffing box tube was off center by 5 mm. By your photos I can not see that. The only way for this to be an issue is if the motor mount rails are glassed in off center, they do not appear to be, or if the strut bracket is mounted off center on the transom. Again it does not appear to be. So from where I sit this problem is very minor if at all.

                        I do not see your receiver antennae. Where is that mounted? Or did you decide to leave it all under the deck. If that is the case let me know how that works out for you.

                        Regarding the Tupper Ware ESC container. I like it but I would have run the power and water leads through the base and not the lid. Just my opinion. Just kidding but a friend of mine looking over my shoulder said to be sure to cut some vent holes. HaHa. But seriously watch the heat build up inside the container. The water cooling cools the heat sink but much of the generated heat has to bleed off to the air surrounding the ESC.

                        I also notice that you have a certain angle in the push rod going to the rudder. Is the angle bend inside the rubber boot? I prefer two smaller angles behind the boot. However, if you have no servo binding issues leave it alone. All in all you have done a good job and have a good base for your learning curve. If you get bored with this setup we can talk about upgrade options, enjoy and have fun.

                        Dave

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                        • 1945dave
                          Senior Member
                          • Mar 2012
                          • 304

                          #57
                          Keith, good point. I dare say most or maybe 98 percent of the guys that say they want a SAW racer really mean they do not want to heat race against other boats at the same time. Fortunately for me that is not my passion. I would rather swap paint and out drive the other guys, which I can not do as well as I could 35 years ago. Just the same there is great satisfaction to be gained in being able to steer a tight course around a set of bouys. To each his own.

                          Dave

                          Comment

                          • Maciek74
                            Member
                            • Jun 2012
                            • 48

                            #58
                            Thanks Dave,
                            Antenna is in center of boat between digits 1 and 2, iam using Hitec receivers so only tip is above deck. Tube is centered cause i aligned it and glued again today.
                            Regarding container, i read soo much about flooded ESCs so i decided to put whole electronics inside, and yes it is warm like hell, but today on test run i almost drowned whole boat (blinded rudder silicone tube inside hull somehow unblinded itself) Lipos and Engine was half in water and all electronics survived. Its biggest container i could place there, and Turnigy ESC's cables are goin straight up so cant be inverted to sides of it, anyways it survived big flood, so works ok :) maybe when ill stop getting water inside hull during runs ill think about taking it out of the box :)

                            Pushrod angle is thing i forgot to adjust, but also couldnt find any good pictures with tips how to do it.

                            Iam sure ill ask U for upgrades soon cause i dont like stagnation either :)

                            Thanks for Your opinion, My best regards
                            Maciek

                            Comment

                            • launchpad
                              Senior Member
                              • Oct 2008
                              • 194

                              #59
                              Hey Guys;
                              Been awhile since I have been here;was sick for some time.Time to get the boats ready.I am just finishing a Genesis,with 2 FSD 2800kv 06xl motors with two 125amp esc"s,and 2-3cell lipos.Not sure whether I should run them parallel or in series.I had someone make up a longer parallel harness for me just incase I go parallel.Also,what about wiring each motor directly to the battery on each side.This is my first twin build so any input would be greatly appreciate it. have a great day
                              AL

                              Comment

                              • Maciek74
                                Member
                                • Jun 2012
                                • 48

                                #60
                                in series ull get over 62000RPM so i think bit too much :)

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