J-Class Lionheart 1/16 scale laser-cut frame set, total length 106″ – kit number MW101!

Save yourself weeks of work and get a precise frame set, designed right from the best plans.

Our kit number MW101 comes with:

  • the laser-cut elements to build the hull
  • a laser-cut deck with correct openings for winches – note that this is manufactured with laser-board, a light product that makes an excellent sub-deck.
  • laser-cut deck houses – these have been redesigned in 2023 and include a more rounded look, making them more realistic.
  • a T-rail structure to ease alignment and construction

Please note the kit does not include strip wood, ballast, spars, mast, rigging, or electronics.

For a blog entry on the construction of a J-Class model, please click here.

Our kits are derived from the Book of America’s Cup yacht designs. The Book imageYears ago people would use plans like these to make enlarged paper copies and then use those enlarged sheets to cut their own bulkheads and keels. This was extremely time consuming and was imperfect. Today’s modeller can get better results, and reduce his construction time considerably, by using digital media and computer-controlled machinery.

At Modeller’s Workshop, we start with paper plans and use various CAD software to transform the drawings into smooth 3D representations of the plans. Our process ensures you get smooth hulls, good symmetry, and, best of all, a boat that sails well.

Our hulls are designed to allow you to add ballast where necessary and the depths of the keels are tweaked for better handling. This J-Class sailboat hull is deepened by approximately two inches below the scale depth. This is in concordance with the rules of the official J-Class R/C website which can be found here

From the line drawing, we make a set of frames and the number of frames we make depends on the size of the model. In the case of this large boat, we send you thirty-one frames. The model is also designed with a T-rail design that you should use to build a straight and true hull. For accurate construction, the T-rail should be lined up carefully and attached to a working board.
Once the design is complete, we transfer the design to the software that runs our laser-cutters. The parts are optimized to reduce material cost and weight. For this large model, you get a number of 24 inch by 12 inch plywood sheets for the hull and another set for the deck parts.


Currently, we have plenty of information about the construction of this model. We also have many pictures of models as well as pictures of the real boat. This material will be made available to you if you decide to build this wonderful model.

Thanks for looking!

The Modeller’s Workshop
Montreal, Canada

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