Why are you sailing two SUPs?
We stop off many islands and bays on our long motorboat summer trips. The two sons sail Optimists, but the hulls don't fit on deck. But we always have two SUP boards with us. At some point I thought: why don't we at least take the sail with us?
Did your design work immediately?
Not at all. It was a process of experimentation. We wanted a solution that was not only solid but also light, given that each SUP weighs only 10 to 20 kilograms. We therefore tested various mast bases and connections to the beams. The idea was always to keep everything simple, light and safe - even for children.
Which variant led to success?
I run a small marine equipment company called Separ Náutica, so we are used to building parts experimentally. The mast base is now reinforced with stainless steel and distributes the loads across the structure. Two crossbeams connect the SUPs, forming a stable catamaran platform.
You used the Opti rudder. But why not the centreboard?
With our centreboard reaching from front to back, which has hardly any draught, we and especially the children can make water on the beach with the SUP catamaran.
Does this work with SUPs of all sizes?
In principle, yes. But there should be two identical boards.
Do you have to experiment with the assembly?
Yes, because positioning is very important.
Photos show a larger sail.
After a summer sailing season, we realised how stable the platform is and how well it sails. So we experimented again. The new rig increases the 3.5 square metres of the Optimist by 1.2 square metres, which gives the boat a somewhat sportier character.
And how does the SUP catamaran sail compared to the conventional Opti?
In moderate winds, we were surprised at how quickly it accelerates. The sailing characteristics are different from those of an optimist, but the catamaran platform offers good stability and comfortable performance for recreational sailing. Ultimately, the most important part of the project is having fun sailing together as a family anyway.
Will the catamaran kit be available in series production?
We are currently finalising the configuration. But yes, the kit will be dispatched internationally. Other families should also be able to enjoy it.
Nils Theurer
Freier Mitarbeiter, Südkorrespondent
