Float the boat

WORDS Alma Viviers PHOTO Micky Hoyle

VISI chats to naval architect Kobus Potgieter, who uses the innovative technology of 3D-printing on a daily basis.

Kobus Potgieter designs everything from ambulance boats used in Rwanda and coast-guard patrol boats for Turkey, to revolutionary new stand-up paddle-boards.  

Once he receives a brief that includes the speed and distance the boat will operate at, as well as its capacity and function, he travels to the region where his design will be used to examine the sea conditions. This determines the haul shape that forms the basis of his design. 

Kobus says 3D modelling software has revolutionised the discipline because it allows for virtual design walkthroughs. “The disadvantage is that you sometimes lose perspective of the boat as a complete object.”

To guard against this, KND has acquired a 3D printer that allows them to print a monochrome scale model. This is created with a special fine powder in a layer-by-layer process that builds up the model. The model feels like gypsum, and can be sanded and painted. 

“We print a model for every boat we do before the construction phase,” Kobus says. “It’s uncanny how you can immediately tell if the design works or not. I always tell my colleagues that 80% of the design is conscious and 20% is pure gut feel.”

Visit the KND gallery for reproductions of vintage boat plans, maritime photography and other art at 84 Shortmarket Street, Cape Town.