Boston Whaler type construction

Discussion in 'Boat Design' started by Saqa, Dec 19, 2014.

  1. markstrimaran
    Joined: Dec 2014
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    Location: usa

    markstrimaran Senior Member

    pour foam

    I am useing pour foam. Then sand saw flush. Seal coat then two layers of 20 oz. As stringer alternative. On a 14' trimaran that can easily get swamped in rouph lake waters.
     
  2. Saqa
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    Location: Hervey Bay

    Saqa Senior Member

    Good to hear that Mark, are you using it for structural or just a former for the glass? How thick are the stringers and what density PU are you using if you dont mind me asking?
     
  3. markstrimaran
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    markstrimaran Senior Member

    surfboard style

    The hull has survived over 50 years already. its a early glasstron. Over a 1/4" thick on the sides and a 1/2" on the botton. i sailed it all summer with a loose plywood floor. 2 pound foam will be pured in many layers with the last layer capped with a plywood form to keep the expanding foam flush with red wood cross stringers. then it has two steel crossmebers epoxied and glassed to support the folding amas. it also has a 4 inch deep keel of 3/8" 1958 year factory glass. I
     
  4. markstrimaran
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    markstrimaran Senior Member

    its heavy

    It is a unique aft masted. Purposed for fishing on a very rouph lake in iowa. 30 mph winds with cliffs on both shores. It will still be fishing when the bass boats are heading home.
     
  5. Saqa
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    Location: Hervey Bay

    Saqa Senior Member

    Cheers Mark, sounds good. Especially the bit about being able to fish on :)
     
  6. outdoorplay
    Joined: Dec 2014
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    Location: OC

    outdoorplay Junior Member

    you just described the very boat that I need to build, I started with Alloy then research polyethylene sheets, and now looking into plywood, but for the impact factor, I think the polyethylene sheets will take the best impact as long as its back filled.

    in the offroad racing industry we have stopped using steel as skid plats, all of your high end builds are using polyethylene sheets now, it has taking over the industry in just the last few years.

    I look forward to talking to you more about this, are you still re research mode or are you building yet?
     
  7. markstrimaran
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    markstrimaran Senior Member

    posting photos

    Any help would be great. Samsung 5mp galaxy
     
  8. Boat Design Net Moderator
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    Boat Design Net Moderator Moderator

    Welcome to the forum Mark. I do not have a samsung galaxy to test with specifically; if you have a notebook, ultrabook tablet, or other computer and/or can use an alternate web browser (firefox, chrome, safari, internet explorer) please give that a try instead to narrow down the issue.

    There are a few ways to include photos with your post:
    Click on "Go Advanced" on the quick reply or click the blue Post Reply button, then click Manage Attachments and you can upload images with your post. Make sure you don't have your browser set to block the attachment popup window. Then you select the photo from your local drive, click upload, and then post your reply or new post and the images will be attached. JPEG is format to choose for general photos (and standard JPEG, not JPG2000 (JP2) or other variants.)

    Alternately, you can use IMG BBcode tags to include your photo from your publicly accessible web space or photo sharing site (flickr, photobucket, smugmug, zenfolio, etc.) by including the jpeg image's URL within IMG tags.
     
  9. outdoorplay
    Joined: Dec 2014
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    outdoorplay Junior Member

    one thing to look at is the size of your phone, most newer cameras are taking pic at 2 to 6 megs, and that is way to big for most forum boards and lot of them have restrictions on how big of a file you can upload to not wast bandwidth. most all photo edit programs have a easy re-size tool.
     
  10. markstrimaran
    Joined: Dec 2014
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    Location: usa

    markstrimaran Senior Member


  11. Saqa
    Joined: Oct 2013
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    Saqa Senior Member

    Mate I am with you regarding HDPE. I have quite a bit of experience with PE boats, its my personal fav boat material. I am pretty ok with welding PE but not on the scale needed to build a boat. I am still researching. PP honeycomb looks good on paper. I have posted a query if it can be stitched over frames to assemble a hull but seems everyone are out partying. Hopefully I will be able to learn more about it so I can either add it to the list of suitable materials or rule it out. I once I have settled on a material I will then look at a design that can be built using it that fulfills my needs

    At the moment its 8lb PU "solid" core vs welded HDPE vs glassed PP honeycomb. From what I can see, honeycomb looks to be the most difficult to repair, but I might not be aware of repair techniques. On the other hand PU and HDPE seem very easy to repair

    It will be good to collaborate on this, we might be able to learn something elsewhere that might help each other. I'll draw some simple lines of the type of vessel I am looking at and post in the projects section then take another look at the materials short list and fine tune the design

    Jon
     
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