Recent Content by Skip Johnson

  1. Skip Johnson
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    Mast raising/lowering question

    A variation of your suggestion works quite well. I just rigged a loop around the mast attached to the stub mast halyard and slid it up to where it...
    Post by: Skip Johnson, Apr 15, 2024 in forum: Multihulls
  2. Skip Johnson
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    Mast raising/lowering question

    Sorry no videos yet, boat's not yet in the water. There is a bit about the boat here page-240#post-952434 based on a bit in Proafile. One of my...
    Post by: Skip Johnson, Apr 13, 2024 in forum: Multihulls
  3. Skip Johnson
    Thread

    Mast raising/lowering question

    I've got a small dilemma, current proa build has two lightweight 21' masts from sectional step tapered flagpole (~20# each). I had lifted them...
    Thread by: Skip Johnson, Apr 12, 2024, 5 replies, in forum: Multihulls
  4. Skip Johnson
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    Why are hulls curved when looking from the side?

    Thanks for the report. I had forgotten the Bionic Broomstick, it was a total rectangle in side view, 14' long (Texas registration rules) 8" wide...
    Post by: Skip Johnson, Feb 27, 2024 in forum: Boat Design
  5. Skip Johnson
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    Why are hulls curved when looking from the side?

    Good question. Number 1's already been mentioned, The hull with a straight bottom will have more wetted surface, hence more drag. Also the...
    Post by: Skip Johnson, Feb 25, 2024 in forum: Boat Design
  6. Skip Johnson
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    thinking about a new rowing boat

    Bolger's Gloucester Gull is one of those timeless masterpieces, nothing to add or subtract; I'm sure it would enjoy a little company ;-) Re...
    Post by: Skip Johnson, Jan 22, 2024 in forum: Boat Design
  7. Skip Johnson
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    Plastic joists for pontoon boat

    The problem with HDPE besides weight (too much) is stiffness (too little). Extruded aluminum or fiberglass box sections would be better suited for...
    Post by: Skip Johnson, Jan 1, 2024 in forum: Boat Design
  8. Skip Johnson
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    Unusual design for an extra-heavy-displacement 11ft long Atlantic Proa for circumnavigation

    I've been on holiday without my log in credentials so haven't been able to comment but have given this project some thought. First Robert Bieglar...
    Post by: Skip Johnson, Nov 27, 2023 in forum: Boat Design
  9. Skip Johnson
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    Rowing catamaran

    Interesting, probably a big advantage in having less movement of CG in relation to CB. FWIW last year I had a client interested in building a...
    Post by: Skip Johnson, Nov 3, 2023 in forum: Boat Design
  10. Skip Johnson
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    Multihull Structure Thoughts

    No need to apologize, a boat in a cramped shop doesn't have any scale references to refer to. QB is far from being ready to sail, hope to splash...
    Post by: Skip Johnson, Oct 28, 2023 in forum: Multihulls
  11. Skip Johnson
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    Multihull Structure Thoughts

    oldmulti, I'm honored to be mentioned in this thread. I typically don't like to say anything about a project until it's done but Topher Dawson...
    Post by: Skip Johnson, Oct 28, 2023 in forum: Multihulls
  12. Skip Johnson
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    Multihull Structure Thoughts

    Very nice looking work. FWIW on self trimming wing sails I highly recommend looking at Peter Worsley's circular cam control, it worked quite well...
    Post by: Skip Johnson, Oct 20, 2023 in forum: Multihulls
  13. Skip Johnson
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    Navigating Through Keel Challenges: Seeking Wisdom on Sailboat Redesign

    It's a lovely boat. A part of the beauty is in the slippery hull shape. Which means that there isn't much form stability, the boat will always...
    Post by: Skip Johnson, Oct 10, 2023 in forum: Boat Design
  14. Skip Johnson
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    My feathering paddle wheel pond boat

    That's really slick, haven't seen the geared method of keeping blades parallel to motion, looks more effective than feathering blades. The most...
    Post by: Skip Johnson, Sep 30, 2023 in forum: Boat Design