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 Recto-verso 
An unusual monohull yacht. 
Marc Van Dessel  marc.vandessel@siemens.atea.be 
 
Specifications 
  
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                 Length overall  | 
    6.00 m | 
   
  
    | Length waterline | 
    5.60 m | 
   
  
    | Length Trailering | 
    7.65 m | 
   
  
    | Beam | 
    2.50 m | 
   
  
    | Draught boards up | 
    0.35 m | 
   
  
    | Draught boards down | 
    1.45 m | 
   
  
    | Interior headroom | 
    1.55 - 1.85 m | 
   
  
    | Displacement empty | 
    750 kg (with water ballast filled) | 
   
  
    | Ballast | 
    300 (water) + 50kg (centerboard) | 
   
  
    | Trailering weight | 
    450 + 150 kg | 
   
  
    | Sail area | 
    15 sq. M | 
   
  
    | Mast height above WL | 
    8.5 m | 
   
  
    | Sleeps | 
    2 | 
   
  
    | Sails | 
    4 | 
   
  
    | Building complexity | 
    medium | 
   
  
    | Performance | 
    medium | 
   
  
    | Luxury | 
    very good | 
   
 
 
  
         Description 
  
    
      :This design is unusual. It turns the classic division
      between cockpit and cabin around. Hence the name recto-verso.
                  
        
                    Exterior 
        
       
      
        - The cockpit is in front of the cabin, just after the mast. The bow itself
          is raised a bit to give protection to the cockpit. There are cockpit seats on the sides
          but also on the back of the cockpit. From these forward-looking seats, one can easily
          operate the steering wheel. This gives a very natural feeling for newcomers.
 
        - The cockpit floor is raised to allow self-draining. The swinging
          centerboard remains under the floor. This keeps the cockpit floor flat.
 
        - The cabin table can be mounted on the steering pedestal.
 
        - Just aft of the cockpit is the entry of the cabin. It is slightly offset
          to starboard.
 
        - A traveler runs on the cabin roof. It improves performance.
 
        - The stern of the boat is accessible in the event of problems.
 
       
      
        
                    Interior 
        
       
      
        - By placing it at the back of the boat, the cabin is very wide. So no
          V-berth but a real nearly square berth (2.0m x2.0m). During day, the berth is transformed
          to a big dinette by raising the table. It seats 5.
 
        - Also rare in a 6m boat is a real separate toilet room. It has comfortable
          standing and sitting headroom.
 
        - To the starboard side is a galley with full standing headroom (1.85m). 
 
        - The cabin floor is raised a bit at the dinette.
 
        - Storage room is at the galley and under the seats.
 
       
      
        
                    Stability 
        
       
      
        - Ballast is used for stability. It is split in two parts. 
 
        - 300 kg water ballast under the cockpit floor. 
 
        - The centerboard has 50 kg of lead down low in the tip. The board can
          swing up for trailering, beaching and safety.
 
        - This high ballast ratio gives a smooth ride. This corresponds perfectly
          to the design goal of Recto-verso where luxury is more important than performance.
 
       
      
        
                    Sail 
        
       
      
        - A cat rig is used. The main reason is to keep the mast as far to the bow
          as possible in order to keep the cockpit free.
 
        - The sail is kept relatively small. Performance is not the main goal.
 
        - The mainsheet runs from the traveler on the cabin top to the mast-base
          and the raised bow.
 
       
      
        
                    Motor 
        
       
      
        - The choice of motor is a difficult point for this design. Because the
          motor is difficult to access, I recommend using an electric motor, which asks for less
          attention. The heavy batteries can replace a part of the water ballast.
 
        - Another option is to install a small inboard motor under the cockpit
          floor.
 
       
      
        
                    Trailer 
        
       
      
        - A standard boat trailer can be used.
 
       
      
        
                    Building technique 
        
       
      
        - Stitch and glue with 8 mm ply is used. Every exposed surface is to be
          covered with glass and epoxy.
 
       
      
        
                    Time to build 
        
       
      
      
        
                    Cost 
        
       
      
        - 7000$ including motor and trailer
 
       
      
        
                    Pro's 
        
       
      
        - something completely different
 
        - excellent view; first row experience
 
        - appealing cockpit with seats looking forward
 
        - self draining cockpit
 
        - lots of interior space
 
        - toilet in separate room
 
        - king size berth (2.00 m x 2.00 m)
 
        - seats 5 around the table
 
        - water ballast gives low trailering weight combined with good stability
          under sail
 
        - easy to operate steering wheel
 
       
      
        
                    Cons 
        
       
      
        - crew has less protection against wind and waves
 
        - rudder is hard to reach when problems with the steering
 
        - medium performance (high windage, cat rig)
 
       
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Drawings 
  
  
  
  
 
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