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Thread: Building A Scow Moth.

  1. #36
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    Default Re: Building A Scow Moth.

    All day fairing. It’s kind of like balancing a ceiling fan—if you know, you know

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  2. #37
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    Default Re: Building A Scow Moth.

    Starting the planking, if you can call it that. 1.5mm is interesting stuff, very fragile. My eyes has two rules: no kitchen stuff for epoxy and no epoxy on the dogs.

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  3. #38
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    Default Re: Building A Scow Moth.

    You do beautiful work.

  4. #39
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    Default Re: Building A Scow Moth.

    Thanks Mike.
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  5. #40
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    Default Re: Building A Scow Moth.

    Wow 1.5mm How do you join sheets , scarf or butt?

    I would have thought the face veneers would run perpendicular to stringers for stiffness?

  6. #41
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    Default Re: Building A Scow Moth.

    . Wow 1.5mm How do you join sheets , scarf or butt?
    butt block from 3mm plywood.
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  7. #42
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    Default Re: Building A Scow Moth.

    . I would have thought the face veneers would run perpendicular to stringers for stiffness?
    the chines will be taped with 2oz glass. The inside will be glass in between the stringers.
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  8. #43
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    Default Re: Building A Scow Moth.

    Plugging the staple holes.

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  9. #44
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    Default Re: Building A Scow Moth.

    Frigging iOS stupid sideways pictures. There’s no rhyme or reason to it…
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  10. #45
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    Default Re: Building A Scow Moth.

    Ready to tape the seams followed by generous application of micro balloons & fairing. I think Iíll name her Lumpy

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    Last edited by CK 17; 08-28-2021 at 05:41 PM.
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  11. #46
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    Default Re: Building A Scow Moth.

    Last edited by CK 17; 08-28-2021 at 05:40 PM.
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  12. #47
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    Default Re: Building A Scow Moth.

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  13. #48
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    Default Re: Building A Scow Moth.

    After a long debate with myself about whether to overlook some buckling that occurred with the 1.5mm plywood and varnish, or fill and paint, fill and paint won out. C/B slot is cut in. Iíll flip it tomorrow and then itís a race against the thermometer to see how much I can get down before the temperature forces me out of the garage.

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  14. #49
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    Default Re: Building A Scow Moth.

    Ouch. What do you suppose triggered that?
    -Dave

  15. #50
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    Default Re: Building A Scow Moth.

    Probably trying to do too much with one piece of ply. Basically I tried to bend around the boats rocker, as well as somewhat of a radii from port to starboard…and the gull shape at the bow.
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  16. #51
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    Default Re: Building A Scow Moth.

    Flipped it. Weights about 25 lbs as is. Lots of filleting, glassing and adding gussets in my future.

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  17. #52
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    Default Re: Building A Scow Moth.

    What an elegant structure. Will the floor (sole?) of the cockpit be covered with plywood that is thicker than that fragile 1.5mm plywood used on the bottom? Also, what are the short pieces on top of the last frame before the transom?

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  18. #53
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    Default Re: Building A Scow Moth.

    The plan’s call for 1.5 reinforced with Kevlar. Those are filler blocks of cedar, I’ve yet to plane then to the cockpit radius.
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  19. #54
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    Default Re: Building A Scow Moth.

    the plans call for glassing all the corners between the bottom and the edge of each stringer. I’m choosing to fillet. It’s about a 3 day project. Trying to keep it neat and clean. The inside of the bow is to the left, station 400 is in the middle, station 805/mast step is partially in view to the right. Near the bottom you can see the scores I put in the first ply to get the wood to bend around the gull shape of the bow.

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    Last edited by CK 17; 09-18-2021 at 11:51 AM.
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  20. #55
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    Default Re: Building A Scow Moth.

    This former Moth builder and sailor likes to see this kind of build project.It shows how broad the range of wooden boats can be.What material will the decks be?

  21. #56
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    Default Re: Building A Scow Moth.

    Quote Originally Posted by John Meachen View Post
    This former Moth builder and sailor likes to see this kind of build project.It shows how broad the range of wooden boats can be.What material will the decks be?
    Forward will be 1.5mm ply. The plans call for the cockpit deck to be 1.5 mm ply reenforced with Kevlar set in epoxy. We’ll see about that. Some are using carbon fiber. Others are using 3mm and fiberglass.
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  22. #57
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    Default Re: Building A Scow Moth.

    50 gussets. These will tie in the frames to the stringers. Kevlar bandages will complete the bonding.

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    Last edited by CK 17; 09-28-2021 at 01:47 PM.
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  23. #58
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    Default Re: Building A Scow Moth.

    Saving our backs for scow moth sailing

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  24. #59
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    Default Re: Building A Scow Moth.

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  25. #60
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    Default Re: Building A Scow Moth.

    Looking really nice.
    -Dave

  26. #61
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    Default Re: Building A Scow Moth.

    Looking forward to this one, way back in the early 70's I sailed several scow design Moth's with a view to building one, exciting in a decent blow.

    Neil.

  27. #62
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    Default Re: Building A Scow Moth.

    I'd like to be wrong,but I have concerns about the brown splodges on the foredeck.With many of the pinhole fillers there is a strong chance of the pigment leaving a blotch that can be seen after varnishing.It can be better to apply a sealer coat first.If it's just glue,you might be lucky enough to avoid the issue.

  28. #63
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    Default Re: Building A Scow Moth.

    I've been enjoying this build for a while now. Thanks for posting!

  29. #64
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    Default Re: Building A Scow Moth.

    It was common for many Oz builders of light boats to cut the webs away from the skin in between the stringers, I think this was to eliminate a hard spot if the skin in between the stringers oil canned a bit.
    The most extreme stringer frame boats I m familiar with had many more much smaller stringers. 11/16" x 1/8" on something like 2" centers. Frames were on 1" centers. This was for the C Class Catamaran Patient Lady V. A highly loaded hull for a 25" catamaran weighed just a bit more than 100 lbs.
    SHC

  30. #65
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    Default Re: Building A Scow Moth.

    The Dagger board and rudder are laminated up. I’ve got the crude foils sketched out on one edge. As soon as it stops raining I’ll run a series of kerfs and then hand plane away the material. The numbers represent millimeters depth of the kerf cuts.

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  31. #66
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    Default Re: Building A Scow Moth.

    Quote Originally Posted by John Meachen View Post
    I'd like to be wrong,but I have concerns about the brown splodges on the foredeck.With many of the pinhole fillers there is a strong chance of the pigment leaving a blotch that can be seen after varnishing.It can be better to apply a sealer coat first.If it's just glue,you might be lucky enough to avoid the issue.
    Plan B is paint
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  32. #67
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    Default Re: Building A Scow Moth.

    And now for something a bit different…
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  33. #68
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    Default Re: Building A Scow Moth.

    Quote Originally Posted by CK 17 View Post
    The Dagger board and rudder are laminated up. I’ve got the crude foils sketched out on one edge. As soon as it stops raining I’ll run a series of kerfs and then hand plane away the material. The numbers represent millimeters depth of the kerf cuts.

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    Try to be something other than crude with this aspect of the boat and it will pay big dividends.It helps a lot to use a marking gauge to leave a permanent centre mark on the the leading edge and trailing edge for reference during the shaping process.You may have already encountered the online foil section databases or generators and they are a big help.

  34. #69
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    Default Re: Building A Scow Moth.

    . You may have already encountered the online foil section databases or generators and they are a big help.
    No, I have not. Tell me more.
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  35. #70
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    Default Re: Building A Scow Moth.

    Shaping the dagger board. I used the same technique I used in shaping the sound board and front of the mandolins I’ve built. It’s working pretty well. I still have a ways to go and some of the knots are not cooperating just as I thought they wouldn’t. If necessary, I’ll route them out and glue in clean wood.

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