Hard dodger - IF26 - Folkboat

Discussion in 'Motorsailers' started by MBMarine, Apr 20, 2023.

  1. MBMarine
    Joined: Dec 2008
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    Location: Norway

    MBMarine Junior Member

    Hi

    I do have a fully paid version of Rhino, but my skills in actual designing and utilizing the tool are somewhat limited.
    Would anyone be kind enough to help me out designing a hard dodger/spray hood in GRP/epoxy so that I don't have to eyeball it?

    I have some pictures and a recipe that I would like to follow. They will be e-mailed to you with greater deatil. Guidance picture, copy right Mr. M.Rowney. I willl compensate you for the work and the picture is just an idea of what I'm looking for. I'm modyfying a small boat to a small blue water sailer and a trad. sprayhood simply won't do the job with a boat this size. It's a Marieholm IF26 design (aka. modified Swedish Folkboat which was originally build in wood. This one is not.)

    Please let me know if you think you can assist me.

    Thank you.

    Kind regards,
    Marius B
     

    Attached Files:

    Last edited: Apr 20, 2023
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  2. bajansailor
    Joined: Oct 2007
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    bajansailor Marine Surveyor

    Marius, can you post your pictures and 'recipe' on here for everybody to see please?
    This is the whole point of a forum, so that everybody (who is interested) can try to help you.
    Is the boat in the photo also an IF 26?
    Re not being skilled in Rhino, you could try the old fashioned alternative, paper and pencil, to sketch out your thoughts initially - folk on here can then help you to develop them further.
     
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  3. MBMarine
    Joined: Dec 2008
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    MBMarine Junior Member

    Sure. Will do, but this is the courtesy and well will of the person mentioned above. The method was sent to me, but he is a very nice guy and I'm sure he won't mind sharing the pics. He told me this dodger was crucial for his sanity (and dryness) to survive and endure a long trip in blue bater in a boat this size.. I think I even have a CAD-file of the boat, but I have not checked or verified the accuracy of the measurements of this file against the actual type.

    More info to come soon (once I find the files. Not a natvie english speaker so please forgive my english :)
     
    Last edited: Apr 23, 2023
  4. MBMarine
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    MBMarine Junior Member

    CAD-file to come. Not my CR either, but it's out there for everyone. I have not requested it - found it by search.
     

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  5. MBMarine
    Joined: Dec 2008
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    MBMarine Junior Member

    I will most likely mold in a piece of Dinycell or some kind of other material to go along the aft edge og the dogdger. Both to lead away rain water and swells down the sides so most of the water will be drained down by the winches on each side and not into the cockpit (or my neck). It´s just the general shape of the dodger I need. I can cut out and mount the perspex/windows myself. The further aft it extends the better, but might interfere with the handling of the winches. I have had an idea to just make room for the winches for furling with a handle, just making shure my hands don't touch the dodger while furling.

    I can probably also make it easier for you by providing the drawing of the boat so the distance between the boom etc. will not become a problem. A file in 3dm-format is also provided. I hope it should be possible to open the file by most, but as mentioned above - I don't know the accuracy of this work or if it it's actually according to the actual boat.

    Thank you very much everyone :) 3dm file too large to attach. Get in touch me if needed. I can zip it. Forgot the files, but will be attacehd shortly.
    Please let me know if some of them are in the wrong format for you or something.
     

    Attached Files:

    Last edited: Apr 26, 2023
  6. MBMarine
    Joined: Dec 2008
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    MBMarine Junior Member

    It is indeed a photo of a IF26. Please check the updated info below. I think the info I have provided with additional pics and drawings should be sufficient :) Allthough pen & pencil is often the best solution to get the message across.
     
  7. MBMarine
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    MBMarine Junior Member

    Last edited: Apr 24, 2023
  8. skaraborgcraft
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    skaraborgcraft Senior Member

    I always thought this one was well done.

    getimage.aspx.jpg
     
  9. MBMarine
    Joined: Dec 2008
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    MBMarine Junior Member

    Thanks. Got a hold of the article from Practical Boat Owner. Bigger is not always better. But, it's the approach on how to make the dodger that is my main challenge. And most of all designing it via CAD that would be my first step. Building is not that hard. For me anyway - it's the fact that I'm not all that good with Rhino (or any other software for this purpose).
     
  10. skaraborgcraft
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    skaraborgcraft Senior Member

    I do not understand why CAD is required, unless you are farming out the construction to a third party? If "building is not that hard", it is even easier to mock up and measure onto paper, but im a person who has always built from and designed with paper and battens.
     
  11. MBMarine
    Joined: Dec 2008
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    MBMarine Junior Member

    I think it comes down to the accuracy, that I know what it will look like in the the end. I have previously sniffed at lofting and the theory behind it, but not good at that either. What I am capable of on the other hand (and like) is to use the CAD-format for measuring purposes. I am terrible with a pen, paper and most importantly an eraser is mostly what I need I honestly have to admit. People's brains just work differently. My strength in all modesty is to build it when it is designed.

    I can promise you there is no third party involved here, but if the designer feels like it - by all means. Sell the design to people with the same needs. I have no economical interests along those lines and I will provide building instructions for free. With pictures.

    If you look at one of my old posts from ages ago there was a guy who drew up a pretty close to accurate model of the type of boat I was working on at the time in a matter of a few hours, because he knew the CAD tool he used. That's why I posted this request/question/offer and the only reason.
     
    Last edited: Apr 24, 2023
  12. skaraborgcraft
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    skaraborgcraft Senior Member

    No worries. I cursed the day i had to upgrade from XP. Only dabbled with Freeship and for me, not worth the time invested in the learning curve. I still have Plyboats on a floppy disc, about the only programme i could operate......hence my paper and pencils...old dog new tricks and all that.

    Hope you find someone who can help you out. I believe someone said you can dump photos in "sketch-up" and then scale/adjust them in 3d. Never used it so cant say.
     
  13. MBMarine
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    MBMarine Junior Member

    I find myself somewhere in between. My old man uses pencils and I have (at some point) had suffcient skills to do this on my own, but if you don't use it regurarly - it fades. And thank you by the way. Maybe I will take the time to go through all the tutorials and all of it again..... my hopes are still up. I love Rhino, but it's time consuming to learn and the new features and layouts keep changing. That's why we often have boat building and design as two different tasks :)
     
    Last edited: Apr 26, 2023

  14. bajansailor
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    bajansailor Marine Surveyor

    I am in the same boat as you - I bought a copy of Plyboats 25 years ago, and thought it was amazing - even I managed to get to grips with it. I designed and built / helped to build various multi-chine plywood, aluminium (and one steel) boats with it, including the 15 metre ally cat shown in my avatar (which is still going strong 23 years later).
    But I find that I am getting very rusty now when drawing on paper, as I do very little now.
     
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