Recent Content by lohring

  1. lohring
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    Early Australian C Class cats

    I dug through a pile of dusty old drawings, but couldn't find the mast drawing. I'll keep looking, but I'm afraid it got lost somewhere in one of...
    Post by: lohring, Jun 12, 2014 in forum: Multihulls
  2. lohring
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    Early Australian C Class cats

    I have a mast drawing for the rebuilt mast on Gamecock. It has the same dimensions as the original. I also have some pictures of Weathercock and...
    Post by: lohring, Jun 9, 2014 in forum: Multihulls
  3. lohring
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    Early Australian C Class cats

    Francis Please contact me at lohring@comcast.net. Lohring Miller
    Post by: lohring, Jun 5, 2014 in forum: Multihulls
  4. lohring
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    Question about wingsail foil shape

    If you read the Marine Technology article, you realize that induced drag far outweighs profile drag, even in fairly fast boats. That's why the...
    Post by: lohring, Jun 5, 2014 in forum: Hydrodynamics and Aerodynamics
  5. lohring
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    Early Australian C Class cats

    At Steve's request I've been sorting through a lot of ancient family pictures and papers for American C class history in the late 1960s to early...
    Post by: lohring, Jun 1, 2014 in forum: Multihulls
  6. lohring
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    Sponson Design

    Since water is 800 times as dense as air, the drag of an object in water will be 800 times as great as the same object in water. Minimizing...
    Post by: lohring, May 31, 2014 in forum: Boat Design
  7. lohring
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    Early Australian C Class cats

    My father-in-law, Bill Steane, built a solid wing sail C class in 1967. Van Allen Clark built his full wing mast boat about the same time....
    Post by: lohring, May 30, 2014 in forum: Multihulls
  8. lohring
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    Sponson Design

    Mike Bontoft has designed several record holding model boats. His gas hydroplane still is the fastest RC gasoline fueled boat with a 109+ mph two...
    Post by: lohring, May 26, 2014 in forum: Boat Design
  9. lohring
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    Question about wingsail foil shape

    It's from Marine Technology 1974 at the beginning of the wing era. Otto Scherer and Dave Hubbard are pretty much responsible for the thinking...
    Post by: lohring, May 24, 2014 in forum: Hydrodynamics and Aerodynamics
  10. lohring
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    Question about wingsail foil shape

    The idea of the slotted flap is to provide maximum lift. The early Patient Lady wing designs used a three element section. The current C class...
    Post by: lohring, May 23, 2014 in forum: Hydrodynamics and Aerodynamics
  11. lohring
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    Question about wingsail foil shape

    Again, look at the Yahoo forum. They have complete plans for simple land yachts with wing masts as well as tests and construction information....
    Post by: lohring, May 11, 2014 in forum: Hydrodynamics and Aerodynamics
  12. lohring
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    Question about wingsail foil shape

    There is a lot of information on the Yahoo wingboats forum. Below is a generic wing sail plan and control system. The estimated co ordinates are...
    Post by: lohring, May 10, 2014 in forum: Hydrodynamics and Aerodynamics
  13. lohring
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    Dagger boards and Planning hulls

    This is what we use on a 1/4 scale crackerbox model to make a seriously ill handling planing hull turn. That setup is for right turns, but a fin...
    Post by: lohring, May 7, 2014 in forum: Boat Design
  14. lohring
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    Non fossil fuel propulsion

    These guys have been building ships with non fossil fuel propulsion a long time. This year marks the 60th anniversary of the launch of their...
    Post by: lohring, Apr 12, 2014 in forum: Boat Design
  15. lohring
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    supercavitating hydrofoil sections

    I did some quick research on foil sections as they apply to surface piercing propellers. It discussed supercavitating as well as ventilated flow...
    Post by: lohring, Feb 18, 2014 in forum: Hydrodynamics and Aerodynamics