Avanti Windsurfing Sails

First, Avanti lays a net of fiber along the primary tack to head loading. Each of the ultra lightweight Technora fibers is laid according to calculation. A quick look reveals increased build up along the luff, with increased spacing as one moves towards the leech.

The next step is laying the clew to luff group. One of the most critical fiber sections in the family, here the Technora carries outhaul load forward and reinforces the leech and foot perimeters.

For the third step, foot trajectories are laid upon the primary clew to tack load lines. Paths are generally logarithmically spaced, based on computer modeling, with a higher DPI at the perimeter, then fanning to greater spacing in the main body.

The fourth step is adding the twist trajectories. Here stretch resistance and stability is created on the bias. These help hold the twist flow, and give the sail an extra precise reflex response.

Next 3 machine paths, consisting of multiple Technora yarns are laid down the sockline at a slight offset. This adds strength and stability where the sock interfaces with the sailbody.

The six step involves laying the Technora fiber down the batten pockets. This reduces inline batten pocket stretch, and in combination with the Avanti overlapping pockets, creates symmetrical performance.

Last an xply group is laid on the sail. This serves two purposes. One is handling the bulk of the off-axis loads, while the second is to have a uniform rip stop mesh.

Viewed altogether one can see the incredible complexity of the overall fiber layout. Each yarn is serving a specific need. Looking at each of the corners, you will see density increasing, with nearly all yarns radiating out from the load focal points. As you move toward the center of the sail body, DPI reduces drastically, and cloth is held at incredibly low physical weight. The ultimate advantage is stretch resistance and strength at an absolute minimum weight.