Recent Content by W9GFO

  1. W9GFO
    Post

    Foil design for my motor trimaran

    I don't think a foil where you describe placing it would work, it would be constantly ventilated. From the picture but it looks like the prop...
    Post by: W9GFO, Sep 27, 2020 in forum: Boat Design
  2. W9GFO
    Post

    Dan-O's first boat build. Small 8' Solar/Electric Cat!

    If you chop off the pointy part of the bow that is above the waterline, you will have a square transom in front. You could do the same to the...
    Post by: W9GFO, Dec 16, 2019 in forum: Boat Design
  3. W9GFO
    Post

    Dan-O's first boat build. Small 8' Solar/Electric Cat!

    He has an incomplete understanding of hydrodynamics, specifically how a hull behaves at the interface of two fluids of vastly different densities....
    Post by: W9GFO, Dec 16, 2019 in forum: Boat Design
  4. W9GFO
    Post

    how about floating roads instead of bridges?

    The Hood Canal bridge does not raise up like a drawbridge, instead it raises a long section of roadway vertically, then retracts the rest of the...
    Post by: W9GFO, Oct 22, 2019 in forum: Boat Design
  5. W9GFO
    Post

    how about floating roads instead of bridges?

    We've got three floating bridges around here, two on Lake Washington (fresh water) and one in Hood Canal. I have felt more movement on regular...
    Post by: W9GFO, Oct 21, 2019 in forum: Boat Design
  6. W9GFO
    Post

    Jet drive Canoe

    What makes you think that a jet is more efficient? A jet drive would be terribly inefficient in this application. I am skeptical that any jet...
    Post by: W9GFO, Oct 17, 2019 in forum: Boat Design
  7. W9GFO
    Post

    Propellers on all sides?

    It is not clear to me what the constraints of the course are. For a small boat with a single prop and rudder it is not too difficult to maneuver...
    Post by: W9GFO, Oct 17, 2019 in forum: Boat Design
  8. W9GFO
    Post

    Deployable, shallow submersible observation pod for Catamaran

    I think you are underestimating the forces at that depth. Water pressure at ten feet is approximately 5psi. A one foot square flat panel would...
    Post by: W9GFO, Oct 8, 2019 in forum: Boat Design
  9. W9GFO
    Post

    Need help on how to design a boat

    I've built a half dozen small boats, re-built a couple more and have worked on more than I can remember. Two months ago I bought my first set of...
    Post by: W9GFO, Sep 29, 2019 in forum: Boat Design
  10. W9GFO
    Post

    Dan-O's first boat build. Small 8' Solar/Electric Cat!

    I have been using Free!Ship Plus for quite a while now. I have downloaded and tried DelftShip a couple times, and while I cannot remember the...
    Post by: W9GFO, Sep 23, 2019 in forum: Boat Design
  11. W9GFO
    Post

    Dan-O's first boat build. Small 8' Solar/Electric Cat!

    I am not disagreeing, but would like to point out that the Rick Willoughby style of flat bottom human powered stabilized monohulls has been shown...
    Post by: W9GFO, Sep 23, 2019 in forum: Boat Design
  12. W9GFO
    Post

    So who makes or has made a ship or boat model from wood/sctratch-built,etc?

    I've built quite a few models using laser cut card stock. I used the old DOS program "hulls" or FreeShip to create the developed plates. I've also...
    Post by: W9GFO, Sep 16, 2019 in forum: Boat Design
  13. W9GFO
    Post

    Why do trolling motors burn out?

    A typical trolling motor is not great at getting rid of excess heat. The housing which holds the magnets are well cooled by the surrounding water...
    Post by: W9GFO, Aug 24, 2019 in forum: Electric Propulsion
  14. W9GFO
    Post

    Does a trolling prop have same rpm forward as reverse?

    All the brushless motors I have dealt with have been symmetrical in that regard. Swap any two wires and they run the opposite direction. However,...
    Post by: W9GFO, Aug 24, 2019 in forum: Electric Propulsion
  15. W9GFO
    Post

    Sled Boat Bow rise

    I think this would be very easy to figure out using free software such as FreeShip. Even the old DOS program "Hulls" could manage it. They both...
    Post by: W9GFO, Aug 24, 2019 in forum: Boat Design