Weight / Force Ratio
The sail area/ Displacement ratio (SA/D) of sailing yacht is calculated thus:
- Cubic Root of the displacement in kilos / Square Root upwind sail area in m2
As a reference, let us take a 60 ft. open:
7700kg for 340m2 of sail upwind, i.e. an SA/D: = 1.031 ratio
Note: this type of boat comprises practically no interior fitting out or equipment.
Most boats available on the ocean-going yacht market have a ratio which varies from at worst 2.50 and at best 1.85..
THE SA/D RATIO OF THE TAVA’E = 1,59
This excellent result is due essentially to the most resistant, and the lightest hi-tech construction materials.The weight reduction in the choice of equipment relating to the motorization also plays an important role in achieving this remarkably good result.
HULL AND STRUCTURES
ALUMINIUM ALUSTAR, alloy at a very high mechanical resistance (+20 %) even after welding.
It’s resistance to corrosion is unequalled (+28°/° approx.) compared to standard aluminium used by shipyards in general.
Note: It is used as well in the defence industry for its powerful ballistic properties and by rare, renowned shipyards (very high cost).
Better resistance / weight ratio in superstructure: Coachroof, deck, hatches, bimini top, gantry, all appendages,spars and the saloon flooring…
Glass and / or carbon for interior cabinetwork.
Centring of weights, 1 unique internal combustion engine, less fuel and water storage
(The abundance of electricity source allows use of a desalinator).