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Thread: Outerlimits SV43 build

  1. #31
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    Sorted out the issue with the sloped transom. Sent the mounting bracket out to have a 4* angle machined onto the mounting surface. Came out perfect, not even a scratch. Rudder mounts up perfectly now.

    PXL_20201011_205922266.jpg PXL_20201011_205927470.jpg
    Vac-U-Tug Jr (13mph)

  2. #32
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    Very nice Ryan!
    I have my one motor to two drive shafts gear box and am designing a mount system for my baby sv43.. I’ll post some pictures some to get some feedback.

    And I ran my baby raptor this weekend; Here is video.
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  3. #33
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    Quote Originally Posted by Jesse J View Post
    Very nice Ryan!
    I have my one motor to two drive shafts gear box and am designing a mount system for my baby sv43.. I’ll post some pictures some to get some feedback.

    And I ran my baby raptor this weekend; Here is video.
    That hull is aired out very nicely. Do you have photos of that build posted anywhere?
    Vac-U-Tug Jr (13mph)

  4. #34
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    No pics posted anywhere.. I can summarize here if you like.
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  5. #35
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    Quote Originally Posted by Jesse J View Post
    No pics posted anywhere.. I can summarize here if you like.
    You should definitely start a thread for you build, easier to find. It's becoming a popular hull and people will want to see it. I'll probably combine both my Raptor builds into a single thread.
    Vac-U-Tug Jr (13mph)

  6. #36
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    Good point.
    Probably do same for my baby sv43 for reasons you state.
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  7. #37
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    Quote Originally Posted by fweasel View Post
    Sorted out the issue with the sloped transom. Sent the mounting bracket out to have a 4* angle machined onto the mounting surface. Came out perfect, not even a scratch. Rudder mounts up perfectly now.
    Hey Ryan, how would I get such a rudder for my same hull? Not critical to be black, but that is a sweet touch.
    Thanks,
    J
    Actually I found it at MHZ. I got a couple stingers there too.
    Last edited by Jesse J; 11-09-2020 at 11:35 AM. Reason: Found it
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  8. #38
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    Jesse,

    I've been buying all of my MTC hardware directly from MTC in Germany. Most of it's made to order, so the lead times can be longer than if you buy a part that MHZ has on the shelf. The advantage with direct is there are more part numbers, sizes, and options. He recently overhauled the shop and was calibrating a lot of new machines, which really threw lead times out the window this summer.
    Vac-U-Tug Jr (13mph)

  9. #39
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    Where do you get your powder coating done?
    Thanks Ryan!

    Any progress on your end?
    Last edited by Jesse J; 11-10-2020 at 08:24 AM.
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  10. #40
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    How do you make the glue joints so smooth and perfect for the motor mount? Do you use JB weld? Mine look so sloppy for comparison.

  11. #41
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    Quote Originally Posted by Jesse J View Post
    Where do you get your powder coating done?
    Thanks Ryan!

    Any progress on your end?
    The MTC hardware on this boat is all anodized, done by MTC. The trim tabs were done locally. No progress on this project, haven't touched any boat in over a month and likely won't get back to it for a while unfortunately. I do hope, at a minimum, to get this hull painted this winter.

    Quote Originally Posted by Nick1979 View Post
    How do you make the glue joints so smooth and perfect for the motor mount? Do you use JB weld? Mine look so sloppy for comparison.
    This build is all West Systems G-Glex, thickened with Silica, and dyed black. The key to clean lines is masking out the work area with tape. I've recently started loading my epoxy mixes into a 10ml syringe and using that as an applicator to get a more consistant bead size along the joint. There's less waste, and less overflow onto the masking tape.

    JB Weld can be made just as smooth. A hot hairdryer on low speed will help it flow better and release air bubbles. You have to work in sections though, using gravity to your advantage, otherwise it will run everywhere. For example, on a motor mount, I'd tip the hull on its side, roughly at a 45* angle, and epoxy the outer edge on one plate, and the inner edge on the other, letting gravity hold the epoxy in place against the joint location. Once it tacks up (45min-2hrs depending on the epoxy, I flip the hull and do the other sides. The cosmetics definitely comes with practice.
    Vac-U-Tug Jr (13mph)

  12. #42
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    Quote Originally Posted by fweasel View Post
    This is my "baby" SV43 from Brusher Andy in Germany. It's 48" long, with about a 4.5" overhang on the back, and a stepped bottom design. His full size hull was 67" long, hence the baby moniker. The mold for this style hull was damaged and these are no longer in production, which is too bad. It was the best looking, scale version, in my opinion. My plan for the build is a single TP5680 motor on 12S, intended to run on rougher water at the lake we vacation at.

    Attachment 169232 Attachment 169233
    Andy is still making these. FYI.

  13. #43
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    Well, Jesse's progress has prodded me to make some time for this build. I didn't touch a single boat this winter. I laid out all of the rear hardware, squared it up, drilled some holes, and now it's mounted. I tacked in the rear motor mount, glassed in in with some carbon cloth, then went around the base again with epoxy for a little more strength. I laid carbon cloth down over the canopy front mounting tabs to hide all of the epoxy blobs I had to build up under each one. Added a little more strength, but mostly a cosmetic blanket that looks much better.

    Still unsure on where the batteries and ESC are going to be mounted. I think I decided that last winter, but didn't write it down in my notes, and will have to go through those measurements again. I'd like to put the batteries side by side, directly in front of the motor, but then the ESC will need to be mounted on an angle to the side of the motor, or possibly directly over the top. The ZTW300A ESC is a solid performer, but so damn big.

    PXL_20210411_205832630.jpg PXL_20210411_205910302.jpg PXL_20210411_205647411.jpg PXL_20210411_205948145.jpg PXL_20210411_210755258.jpg
    Vac-U-Tug Jr (13mph)

  14. #44
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    Glad to be of assistance!
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  15. #45
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    Had a dream last night about how to mount the servo using parts and materials I already had. Knocked it out this afternoon. Not the prettiest solution, but it's clean and more importantly, checked off the list. I made an adapter plate to use the existing mounting bolts from the rudder and then countersunk two bolts in the plate to mount the servo bracket. I can refine it this winter, possibly mill a sturdier bracket from aluminum.

    PXL_20210612_201908432.jpg PXL_20210612_202857040.jpg PXL_20210612_202309829.jpg PXL_20210612_202320753.jpg PXL_20210612_205931948.jpg
    Vac-U-Tug Jr (13mph)

  16. #46
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    Trimmed up the push rod, installed a boot, and locked everything down. Now it's time to sort out the ESC mount.

    PXL_20210613_015948285.jpg PXL_20210612_210649321.jpg PXL_20210613_020005314.jpg
    Vac-U-Tug Jr (13mph)

  17. #47
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  18. #48
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    You wouldn't happen to have the MTC website details by any chance?

  19. #49
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    Quote Originally Posted by Fast One View Post
    You wouldn't happen to have the MTC website details by any chance?
    MHZ stocks some MTC hardware on their website, or you can order them directly from Christoph at MTC if you're not in a hurry.
    https://www.mtc-powerboat.de/
    Vac-U-Tug Jr (13mph)

  20. #50
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    That’s quite the novel solution for mounting the servo, great idea!

  21. #51
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    Quote Originally Posted by hughb View Post
    That’s quite the novel solution for mounting the servo, great idea!
    Thank you. I've seen it done that way on other builds and it seemed like a good fit here.
    Vac-U-Tug Jr (13mph)

  22. #52
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    I've been trying my hardest to not finish this boat. So far, I've been very successful with that, until this weekend. I found enough time in the workshop to modify the ESC mount, epoxy it into the hull, build a 12S cap bank, solder all ESC connections, dress the ESC receiver wire, mount the ESC in the boat, drill and install bulkhead fittings for cooling inlet and outlets, and run all cooling lines. I even got my padded cover from Werner in Germany. It fits perfectly.

    PXL_20210724_220645059.jpg PXL_20210724_221317799.jpg PXL_20210724_221246732.jpg PXL_20210724_235216212.jpg PXL_20210724_235147233.jpg
    Vac-U-Tug Jr (13mph)

  23. #53
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    I really wanted to install the water outlet under the rear overhang, but decided it was best to keep the stream visible since it's an aggressive SAW motor and prop combination. I drilled the hull and epoxied in a small section of 7/32" brass tube flush with the outside of the hull. It's will pretty much disappear once the hull is painted. Still unsure of both battery placement and how I'm going to strap them into the boat so I needed a temporary solution for the maiden run. Stuffed in as much foam as I had and cut a slot in the middle just big enough for two 6S packs stacked on top of each other.

    Took the boat to the local pond today for the initial test run and of course, the sailboat club was there, which means I had to haul all of my stuff down to the far end. Got setup , bolted on the smallest big prop I had (ABC2214) and tossed the boat in. It didn't sink, which was victory number 1. Made two quick half throttle passes and brought it back in. Temps checked out, but little more water inside than I would have expected. I haven't done a leak check, so it's probably an easy fix. I did a quick pressure test on the cooling system to make sure I didn't have a pinched o-ring or a bad hose barb on the ESC. No issues there.

    Sent the boat back out and made a few longer passes. Lots of chine walk. Speeds were probably mid 60's, still only partial throttle. Zero setup so far aside from a level trim angle and tabs raised up high. Turns terribly, but that's a known issue with this particular stepped hull design and not a problem for my purposes. Tried to give it a little more throttle to see of speed would settle the hull down, and it wiped out. I forgot to tape the hatch, took on quite a bit of water while the tug was pushing it back to shore. I run a neoprene hatch seal on most of my boats and forgot all about taping down the canopy before I sent it out. Once it was back on land, I noticed the drive hardware was loose, allowing the entire propshaft to wobble back and forth. It was plenty tight on the workbench last night, so obviously more loctite is needed. Wondering if that could have made the chine walk worse. I'll start playing with trim angle and trim tabs next time out.

    PXL_20210725_012619813.jpg PXL_20210725_034708419.jpg PXL_20210725_152740358.jpg
    Vac-U-Tug Jr (13mph)

  24. #54
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    Battery trays are finished! Just need to wait for them to arrive from Germany and get them fitted into the hull.

    LipoTray1.jpg LipoTray2.jpg
    Vac-U-Tug Jr (13mph)

  25. #55
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    It’s looking good Ryan, I love the servo mount. I should find one of these hulls with the overhang transom one of these days for my steerable drive system

  26. #56
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    Quote Originally Posted by srislash View Post
    It’s looking good Ryan, I love the servo mount. I should find one of these hulls with the overhang transom one of these days for my steerable drive system
    Thanks! Hardware that cool needs to be seen. I wouldn't hide it under an overhang.
    Vac-U-Tug Jr (13mph)

  27. #57
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    Quote Originally Posted by fweasel View Post
    Thanks! Hardware that cool needs to be seen. I wouldn't hide it under an overhang.
    Actually if my center pivot was mounted above tHe stinger it would have the desired pendulum effect without all bracketry to fix geometry.
    One day Ryan, one day.

  28. #58
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    Ordered some black glass vinyl and stretched it on the canopy for some last minute windows. Turned out pretty good for my first time working with the stuff. Also poured about 1.5oz of epoxy and chopped fiber into the nose

    PXL_20210814_203456297.jpg PXL_20210814_203504218.jpg PXL_20210808_170339212.jpg
    Vac-U-Tug Jr (13mph)

  29. #59
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    Built a cardboard template so I could figure out where to place notches in the battery tray base to clear the stepped hull ridges. Ground them out from the base plate with the dremel and then glued it into the hull. I used large beads of black aquarium silicone on the bottom side to take up the large gaps without dripping down the hull on the initial installation round. Next, I'll go back and epoxy the side edges with G-Flex for more strength because of the reduced attachment surface area compared to trays in the bottom of a cat sponson. The cured silicone will prevent the epoxy from running down towards the keel and I can do both sides at once without having to tilt the hull while it cures. I also offset the tray slightly to the right by about 5mm to counter balance some of the ESC weight.

    Once that was in place, I started to panic about a high speed crash smacking the upper deck of the hull. It's a lot of flat, unsupported surface area. I did a quick CF inlay on the underside of the deck and then spent the better part of 90min making a bulkhead support template from cardboard. I cut the bulkhead out from carbon plate. I was incredibly lucky that I had a piece in the drawer big enough for this shape. I cut out a relief hole in the middle so I can still stuff flotation foam into the bow. Took several test fits to message a few tight edges and corners, then I epoxied it in from the front face, and will go back and use carbon fiber cloth tape on the back side. The deck is already much stiffer and the epoxy isn't even fully cured yet. Should help with the crashing...


    PXL_20210815_032205481.jpg PXL_20210815_155920787.jpg PXL_20210815_155943173.jpg PXL_20210815_160109002.jpg PXL_20210815_170617810.jpg
    Last edited by fweasel; 08-15-2021 at 11:27 PM.
    Vac-U-Tug Jr (13mph)

  30. #60
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    and I just ran out of resin and hardener... cutting this one close
    Vac-U-Tug Jr (13mph)

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