PVC or closed cell composites?

Discussion in 'Fiberglass and Composite Boat Building' started by 58ketch, Oct 5, 2009.

  1. 58ketch
    Joined: Sep 2009
    Posts: 32
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Portsmouth, Va.

    58ketch Junior Member

    I'm just wondering...has anyone used or experimented with PVC as hull material? How about composite dimensional lumber?

    It NEVER rots.

    It is fully malleable.

    It comes in sheets and/ or planks that are dimensionally stable and consistent.

    It is "weldable" , glueable and screwable...and HIGHLY impact resistant.

    It would seem, aside from the addition framing required, almost a "natural" for hull construction.

    Anyone?
     
  2. gonzo
    Joined: Aug 2002
    Posts: 14,738
    Likes: 756, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    They make all kinds of kayaks and dinghies and other small boats.
     
  3. 58ketch
    Joined: Sep 2009
    Posts: 32
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Portsmouth, Va.

    58ketch Junior Member

    Yes, I am aware of that. I was wondering if anyone had heard of or used these alternative materials in larger scale products where structural integrity is a priority.
     
  4. Commuter Boats
    Joined: Oct 2006
    Posts: 177
    Likes: 12, Points: 18, Legacy Rep: 182
    Location: Southeast Alaska

    Commuter Boats Commuter Boats

    Your biggest problems will be weight and creep, the weight is tolerable in a Roto molded structure as all of the stiffeners are molded in with much of the stiffness coming from a compound shape. In a more conventional build the weight of structure would likely push the material into its plastic zone and creep (slowly deform) would impact cosmetics and performance.
    I've seen a 7.5 x 4' pram welded from 1/4 inch PVC and to suggest that it was an ugly duckling would be kind, it was also heavy and at present only one year old so durability has not yet been confirmed.
     
  5. springerdw
    Joined: Oct 2009
    Posts: 2
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Southern Maryland

    springerdw New Member

  6. rwatson
    Joined: Aug 2007
    Posts: 5,861
    Likes: 295, Points: 83, Legacy Rep: 1749
    Location: Tasmania,Australia

    rwatson Senior Member

  7. 58ketch
    Joined: Sep 2009
    Posts: 32
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Portsmouth, Va.

    58ketch Junior Member

    Excellent article.

    As it happens, it is my work on a '58 Dickerson ketch (a modified bugeye) that got me to wondering about this. She is plank on frame bronze fastened and I could easily see this being "re-engineered" with a composite material like PVC sheet-goods.

    The Rheinholds are doing pretty much what I am asking and on a similar hull type....guess its time to pay them a visit...thanks for the link!

    Here is my current project and "intellectual springboard"...

    [​IMG]

    and a view of her bottom prior to replanking/seaming...

    [​IMG]

    As she was/is built entirely of mahogany which is both expensive and subject to deterioration AND the planks happen to net exactly 1" I could but wonder if the same grace and beauty could not be had with another more "permanent" material....seems it can, in fact.

    Now, how's this work and how's it working out in terms of cost,lifespan, structural integrity and ease of application?
     
  8. Eric+Annie
    Joined: Jan 2010
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Glen Allen, VA

    Eric+Annie New Member

    PVC as an alternative to wood in boat building

    Hello ~
    Ran across your post on the boat design discussion list / PVC thread that you posted back in September 2009.
    We are the "Rionholdt" people. You mentioned that it may be time to pay us a visit. We love to "talk boats", especially deadrises - whether wood or plastic.
    We've lots of experience with the type and are steeped in the tradition. Feel free to give us a call at 804-338-5856.
    Eric
    www.rionholdt.com
     
  9. 58ketch
    Joined: Sep 2009
    Posts: 32
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Portsmouth, Va.

    58ketch Junior Member

    Well, thank you, Eric and Annie Rhienhold...I've been quite interested in the work ya'll are doing and will surely get in touch soon..a visit would be wonderful!

    The good news is that after a long hot summer of shrinking and re-seaming our Dickerson now floats in her slip on her own (bilge pumps keeping up easily). We have identified what we THINK is the last major leak and will address that in the spring along with a myriad of other tasks that are considerably less daunting than those we addressed last summer.

    The entire issue of composites is still out there for consideration, however.;)

    Thank you again for your interest and response. I hope to be able to pay ya'll a visit soon!
     

  10. springerdw
    Joined: Oct 2009
    Posts: 2
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Southern Maryland

    springerdw New Member

    Visit..

    58Ketch,

    Did you ever get a chance to pay the Rionholdt's a visit? I see they have new hull.

    Dave
     
Loading...
Similar Threads
  1. Bzidro
    Replies:
    7
    Views:
    1,133
  2. jjhamm22
    Replies:
    8
    Views:
    1,934
  3. guzzis3
    Replies:
    24
    Views:
    2,922
  4. mojounwin
    Replies:
    8
    Views:
    3,871
  5. BOWTIE
    Replies:
    0
    Views:
    1,273
  6. DennisRB
    Replies:
    7
    Views:
    3,567
  7. captndon
    Replies:
    17
    Views:
    8,683
  8. coolgps
    Replies:
    17
    Views:
    2,572
  9. cattlehound
    Replies:
    4
    Views:
    1,678
  10. gtflash
    Replies:
    5
    Views:
    3,116
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.