A Case for the small(er) Motorsailer

Discussion in 'Motorsailers' started by Laminar Flow, Jun 30, 2025.

  1. skaraborgcraft
    Joined: Dec 2020
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    Location: sweden

    skaraborgcraft Senior Member

    These were pretty popular, Marina 7.5

    [​IMG]

    Early models with the 12hp Yanmar could run at hull speed for 3 hours on a gallon of diesel, and they sail reasonable too.
     
    bajansailor likes this.
  2. Laminar Flow
    Joined: Jun 2025
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    Location: B.C., Canada

    Laminar Flow Junior Member

    I've seen a couple of these in the flesh. Quite a pretty boat too.
     
  3. bajansailor
    Joined: Oct 2007
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    Location: Barbados

    bajansailor Marine Surveyor

    Henry and Glory were an amazing duo.
    Re when they went up the west coast of the USA, Henry had received an invitation to a friends birthday party in San Francisco. He and Glory were in Poole, in England at the time, and he received the invitation with plenty of advance notice (I think about a year).
    Most folk would be wondering about how they would cope with the 12 hour plane journey to California - not Henry. He and Glory decided to sail there. It took them a while, but they got there - in time for the birthday party. And Henry then sailed home again, via Panama.
    On his outbound trip he arrived in Barbados in poor condition - I think he had started off with a cold, which developed into pneumonia - my Mum had been talking to him every day on her Maritime Mobile ham radio net, and my folks promptly organised for somebody to keep an eye on Glory, and they shanghaiied Henry to their home so that he could recover under supervision (my Dad was a retired GP).
    I have attached a nice PDF article about Henry and Glory - he certainly had some amazing adventures.
    Also a (not very good) scanned copy of an article from Practical Boat Owner magazine about the indefatigable duo.

    PBO Glory article P 1.jpg


    PBO Glory article P 2.jpg

    PBO Glory article P 3.jpg
     

    Attached Files:

  4. CarlosK2
    Joined: Jun 2023
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    Location: Vigo, Spain

    CarlosK2 Senior Member

    A couple of days ago I read an interview with a guy who had sailed about 30 k miles across the ocean without hoisting the mainsail, always using different combinations of two bow sails

    (1) a closed boat with a junk rig

    (2) a true and powerful SailBoat, mini-Transat style, but more comfortable and safer

    (3) a small motor sailer

    (4) a classic like an OE 32

    Different options to escape the unbearable standard yacht ...

    ... without going for a 180-210-300 K Euros (2025) Sportsboat or a Class 40 costing 700-800K Euros, which is also uncomfortable and most people would need assistance to sail

    Screenshot_2025-10-29-10-10-12-46.jpg

    OE 32

    ---

    And without 0.9-1 million (?)

    Boréal 47.2 : European Yacht of the Year 2021 | Boreal Yachts https://www.boreal-yachts.com/the-new-boreal-47-2-european-yacht-of-the-year-2021-in-the-category-bluewater-cruiser/?lang=en
     
    Last edited: Nov 18, 2025
    bajansailor likes this.
  5. CarlosK2
    Joined: Jun 2023
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    Location: Vigo, Spain

    CarlosK2 Senior Member

    Screenshot_2025-11-18-12-20-51-91.jpg

    R-33 Class

    R-33 Class, NACA report 405: Max Michael Munk Moment:

    Screenshot_2025-11-18-11-02-23-16.jpg
     
  6. CarlosK2
    Joined: Jun 2023
    Posts: 1,318
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    Location: Vigo, Spain

    CarlosK2 Senior Member

    The standard yacht is often a hydrodynamic disaster because it hasn't received the time, care, and attention it deserves:

    1) The Munk Moment hasn't been calculated or is much larger than estimated

    Munk-(Y) (due to yaw/leeway)
    Munk-(R) (roll/heel + yaw/leeway)
    Munk-(P) (pitch + roll + yaw)

    must be considered

    2) the hydrodynamic center of a modern keel is located forward (!) of the yacht's center of gravity

    3) sailing Downwind crossing an Ocean with Big Waves the bow dips -1°/-2° ... because heel/roll (with "heavy quarters") causes the bow to dip, and because it's carrying tons of lead forward (!) of the pitch axis of rotation ...

    and Munk-(P) => 2 x Munk-(R)

    If we add to all this ...

    4) the orbital current and counter-current of the wave ...

    And

    5) the slowness of a yacht that only hoist 7-10 square meters per Ton ...

    we have an unbearable feedback loop of the three bandits: Roll, Yaw, Pitch
     
  7. skaraborgcraft
    Joined: Dec 2020
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    Location: sweden

    skaraborgcraft Senior Member

    Those OE designs are great upwind in snotty conditions, but can roll the gunwales going downwind. At least you are 99.9% guarenteed it is self righting.
     
  8. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    That is one more arrogant post from you. What have you designed, built, and sailed successfully?
     

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