Open Discussion – Negative Framing

Discussion in 'Boat Design' started by Sean Herron, Nov 17, 2007.

  1. Sean Herron
    Joined: May 2004
    Posts: 1,520
    Likes: 32, Points: 58, Legacy Rep: 417
    Location: Richmond, BC, CA.

    Sean Herron Senior Member

    Hello…

    I would like to open a discussion regarding the merits of building large motor yachts of foam cored FRP construction using negative frames…

    How would you do it...

    How do get workers into the hull for coring and lay-up – strip coring or plank coring – overhead scaffolding or other…

    If anyone knows of any shops doing same – please advise and post photos and links…

    SH
     
  2. ted655
    Joined: May 2003
    Posts: 640
    Likes: 14, Points: 0, Legacy Rep: 122
    Location: Butte La Rose, LA.

    ted655 Senior Member

    Talk to a few surveyers. The stuff has a bad reputation.
     
  3. Squidly-Diddly
    Joined: Sep 2007
    Posts: 1,555
    Likes: 74, Points: 48, Legacy Rep: 304
    Location: SF bay

    Squidly-Diddly Senior Member

    What is 'negative framing'? google and got everything but

    anything about boats.

    Is a frame for foam panels similar to KSS but on the outside?

    Is it applying glass cloth and resin on the inside first?

    "getting the workers in there" is not really a problem, but making sure everything is done right might be a challenge.
     
  4. rwatson
    Joined: Aug 2007
    Posts: 5,852
    Likes: 288, Points: 83, Legacy Rep: 1749
    Location: Tasmania,Australia

    rwatson Senior Member

    Are we talking about something like the method at
    www.bourneboats.com.au
    where the interior is built before the exterior hull?
     
  5. Sean Herron
    Joined: May 2004
    Posts: 1,520
    Likes: 32, Points: 58, Legacy Rep: 417
    Location: Richmond, BC, CA.

    Sean Herron Senior Member

    Sorry...

    Hello...

    Got distracted with all the things to do - eat, sleep, gas up the car...

    Yes and No..:)

    I am talking about cost effective ways of building large 'one of' motor yachts in sacrificial negative framing and temporary moulds - thus not committing to the cost of a plug and the roll over – but I realise now that either way there has to be a roll over - for the outer 'skinning' – because I get stupid sometimes – or that I just am …

    Really just looking at ways of creating large temporary nagative molds for one or two pulls - assuming a grand fairing a paint crew...

    The more that I sit on my *** and really think about it – rather than revel in the new Battlestar Galactica series on TV – I see that this idea it is just a false economy – unless someone has a ‘Eureka’…

    Sorry – never mind me…

    SH.
     
  6. Willallison
    Joined: Oct 2001
    Posts: 3,590
    Likes: 130, Points: 0, Legacy Rep: 2369
    Location: Australia

    Willallison Senior Member

    err... I assume that you're actually referring to building over a male mold.
    Nothing out of the ordinary or unusual in that - it is indeed how most one-off (or even low volume production) boats are built
     

  7. Sean Herron
    Joined: May 2004
    Posts: 1,520
    Likes: 32, Points: 58, Legacy Rep: 417
    Location: Richmond, BC, CA.

    Sean Herron Senior Member

    Never Mind

    post closed
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.