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The BCS trim tab systems are the result of over 40 years of experience and technological development: a continuous commitment in achieving higher performances, total control of stability in any condition, better maneuverability of the boat. The BCS trim tab systems are available in different models covering a large application field, from 8 to 25 mt 37’-110’ both for displacement and planning hulls.

The working principle of a trim tab system is simple. By pushing one of the buttons on the control panel, the electro-hydraulic power unit receives an electric impulse which starts the electric motor. In turn, the latter makes the hydraulic pump start, being connected to it by means of a coupling. As the pump starts to turn, it sends an oil flow towards the side of the hydraulic cylinder corresponding to the desired movement (up or down), making the tab raise or go down. By pushing the button on the other side, the cylinder moves in the opposite direction.

  • The BCS stainless steel trim tab systems are available in a large variety of dimensions and can be combined with four different hydraulic kits, satisfying many different requirements and covering a wide application field. A large choice of accessories complete the system and help to make their use much easier and more efficient.

    MAIN COMPONENTS

    • HYDRAULIC CYLINDER - The hydraulic cylinder is the real "power source" of the trim tab system. It is connected to tab and permits its deflection.
    • TAB - All the tabs are in stainless steel for the highest corrosion resistance. All series are available in two tab types: the simple tab is suitable for application on smaller boats or with lower loads; the reinforced tab on the larger applications.
    • HINGE - It is the fixed part of the tab, which connects it to the transom.
    • ZINC ANODE - It is made out of zinc and it has the function to protect the tabs against the galvanic currents that normally develop between metals of different nature.
  • For the choice of the most suitable model it is important to take into consideration some important factors, such as the boat dimensions and displacement, as well as the max speed, which have the greatest influence on the system performance.

    Starting from the boat type (planing or displacement) and length, select the max speed (with speed lower than 40 knots) and the full load displacement, to obtain the hydraulic kit model and the tab dimensions suggested for a specific application.

    Of course, the table shall be intended as a general reference only, because every application shall respond to the real boat needs according to various factors.

    • In general, it is important to keep in mind some crucial points, such as:
    • the LARGER the boat dimensions and weight are, the GREATER the lift that will be required.
    • smaller fast boats normally need a pair of tabs with reduced dimensions; while larger and slower boats normally need larger tabs.
    • high speed boats (when the max speed is over 40 knots ) usually require a pair of tabs with a limited width but with a longer length.

     

    Boat Length

    Displacement  

    Speed  

    Tab kit

    Planing hull

    7,50 - 9,00 mt 

     < 17  - Tons  

     < 40  - Knots  

     MY3S-3030  

    9,00 -11,50 mt 

     < 17  - Tons  

     < 40  - Knots  

     MY3S-5030  

    11,50 - 12,80 mt

     < 17  - Tons  

     < 40  - Knots  

     MY3S-6030  

    12,80 - 14,00 mt 

     < 35 - Tons  

    < 40  - Knots    

     MY3/5S-7030  

    14,00 -15,20 mt 

     < 35 - Tons  

    < 40  - Knots    

     MY3/5R-7430  

    15,20 -16,45 mt 

     < 35 - Tons  

    < 40  - Knots    

     MY3/5R-8045  

    16,45 - 18,30 mt 

     < 35 - Tons  

    < 40  - Knots    

     MY3/5R-10035  

    18,30 - 18,90 mt 

     < 55 - Tons  

    < 40  - Knots    

     MY4/5S-8040  

    18,90 -19,95 mt

     < 55 - Tons  

    < 40  - Knots    

     MY4/5S-9040  

    19,50 -20,00 mt 

     < 55 - Tons  

    < 40  - Knots    

     MY4/5R-8045  

    20,00 - 21,00 mt 

     < 55 - Tons  

    < 40  - Knots    

     MY4/5R-9045  

    21,00 - 22,00 mt

     < 55 - Tons  

    < 40  - Knots    

     MY4/5R-10045  

    22,00 -23,0 mt

     < 130 - Tons   

     < 35  - Knots  

     MY4R-10045  

    23,00 -24,5 mt

     < 130 - Tons   

     < 35  - Knots  

     MY4R-15045  

    24,50 -27 mt

     < 130 - Tons   

     < 35  - Knots  

     MY4R-20045  

    27 -28,5 mt

     < 130 - Tons   

     < 35  - Knots  

     MY4R-20050  

    28,50 - 30,50 mt

     < 130 - Tons   

     < 35  - Knots  

     MY4R-20050  

    30,50 - 33,50 mt 

     < 130 - Tons   

     < 35  - Knots  

     MY4R-20050  

    33,50 - 36,60 mt 

     < 130 - Tons   

     < 35  - Knots  

     MY4R-20050  

    36,60 - 39,60 mt 

     < 130 - Tons   

     < 35  - Knots  

     MY4R-20050  

    Displacement hull

    11,50 mt

     < 15 - Tons  

     < 18  - Knots  

     MY4/5S-6035  

    11,50 - 12,80 mt 

     < 15 - Tons  

     < 18  - Knots  

     MY4/5S-8040  

    12,80 - 15,20 mt 

     < 37 - Tons  

     < 18  - Knots  

     MY4/5S-9040  

    15,20 - 18,30 mt 

     < 37 - Tons  

     < 18  - Knots  

     MY4/5R-10040  

    18,30 - 19,20 mt 

     < 55 - Tons  

     < 18  - Knots  

     MY4R-10040  

    19,20 - 20,50 mt 

     < 55 - Tons  

     < 18  - Knots  

     MY4R-10040  

    20,50 - 22,00 mt 

     < 55 - Tons  

     < 18  - Knots  

     MY4R-12040  

    22,00 - 24,0 mt 

     < 130 - Tons   

     < 18  - Knots  

     MY4R-15050  

    24,00 - 26,00 mt

     < 130 - Tons   

     < 18  - Knots  

     MY4R-20050  

    26,00 - 28,50 mt 

     < 130 - Tons   

     < 18  - Knots  

     MY4R-20050  

    28,50 - 30,50 mt 

     < 130 - Tons   

     < 18  - Knots  

     MY4R-20050  

    30,50 - 33,50 mt

     < 130 - Tons   

     < 18  - Knots  

     MY4R-20050  

    33,50 - 36,60 mt 

     < 130 - Tons   

     < 18  - Knots  

     MY4R-20050  

    36,60 - 39,60 mt 

     < 130 - Tons   

     < 18  - Knots  

     MY4R-20050  

  • The benefits in using a trim tab system can be briefly summarized and divided into three different types:

    1. Performance improvement
      • Stern lifting and better balance
      • Faster getting on plane
      • Better propeller efficiency for more in-line power
      • Listing correction
      • Decrease of yawing and wandering with cruising quality improvement
    2. Safety improvement
      • Better and greater visibility
      • Better maneuverability at low cruising speed
    3. Efficiency improvement
      • Better engine performance
      • Reduced fuel consumption
      • Staying on plane even at slower cruising speed
      • This means that the installation of a trim tab system not only helps to correct the boat balance for an easier control, but it gives the boating pleasure a whole new dimension.

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