An innovative and ambitious boat
Swiss Solar Boat’s design is imagined on the basis of a proa with addition of foils to reduce drag at high speed. For efficiency our design used a combination of three actuated “T” foil.
A technical challenge for the structure
The structure must be as light as possible while withstanding huge loads of more than one ton. This will be achieved using cuting edge technologies in terms of composite materials. Indeed, this is thanks to thin-fold carbon prepregs (Thinpregs) of the order of 0.04mm per fold with ultra high modulus fibers (T800-HR40) (NTPT link). This will allow us to reach wall thicknesses between 0.25-1mm. In addition, the use of sandwich structure based on a nomex honeycomb body or Airex foam will significantly increase the bending stiffness locally with minimal weight increase.
It is necessary to develop the geometry of the different parts on CAD software (Catia) and test them with theoretical load cases modeled by finite elements (Abaqus). After several iterations, it becomes possible to refine the choice of materials used and the dimensions of the different structures.
In addition, the surface condition of structures in contact with water is of enormous importance to reduce drag. This requires a long, complex and expensive implementation based on the creation of negative carbon moulds.