Cruising Woven Brochure
Fusion M Headsails
Long-lasting durability and ease of handling.
Quantum's woven polyester furling headsails (CW 2000) represent the ultimate evolution of the standard in cruising sail construction, bringing an unmatched level of refinement and attention to detail to the workhorse of the cruising inventory. Durability, ease of handling and performance are equally weighted design criteria along with maximum range and versatility in a reefable sail.
Click on each heading to learn more about the features and construction details of a woven polyester headsail.
Quantum's woven headsails are made using only the highest quality, tightly woven, and most stretch resistant woven polyester available. Minimizing stretch is the key to creating a durable headsail with exceptional shape holding. Because there is wide variation in the performance of woven polyester materials, Quantum's sailcloth is tested in-house and selected from the world's finest manufacturers. This allows Quantum to not only use the very best, but also make sure the fabric is appropriate to the application.
Ultimately, shape makes the difference. Quantum uses a suite of the most sophisticated computational design tools in the hands of some of the most experienced designers. Quantum's proprietary iQ Technology®, combines three dimensional shaping, computational fluid dynamics, and finite element analysis to create custom shaping, tailored on a sail by sail basis to expected usage and boat specific constraints like headstay sag, track location, sheeting angle, displacement, righting moment, etc. Headsail shape features a smooth, flat aerodynamic profile for optimum upwind performance, with an open trailing edge to reduce heeling and weather helm. A round, forgiving entry provides a wide steering groove. Overall shaping is designed to improve partially-furled performance, though the shape allows sailing into a higher range of wind conditions before partial furling becomes necessary.
Quantum's woven polyester furling headsails are built to take on the most ambitious sailing plans. Though the overall structure can be tailored to any wind range, fabric weight is typically heavier than for a single-purpose sail. Extended corner structure in the head and tack and oversized reinforcements are engineered for the rigors of partial furling. Modern cross-cut construction features panels joined with extra wide seams, using a combination of adhesives and multiple rows of triple-throw stitching, with additional "butterfly" reinforcements at both the inboard and outboard ends. Over-sized, tear-drop shaped plied corner patches, designed to conform to the shape of the primary loadings, are used in all three corners. Corners are glued and power pressed into position for maximum bonding and smoothness. Integrated spreader patches guard against chafe and wear. Every aspect of construction is executed to the highest possible standards, with the Quantum Construction Manual providing more than a 1,000 pages of concise detail, so that no matter where you buy your Quantum sail you can be assured of consistent quality.
To adapt to a partially furled (reefed) condition, the furling genoa is designed with several unique features. The strength and weight of the main body is increased to resist stretching, which can lead to the jib becoming fuller as the breeze increases. In general terms, the shape is different with the airfoil flatter overall and straighter in the aft sections than it would be if designed for more moderate conditions. While an older sail can be re-cut for a furling unit, many of the best features of the system, as described below, are compromised, making a re-cut sail less than ideal for this type of use.
Extended Patching in Head and Tack
The first portion that rolls up is the head and tack reinforcing. They need to be extended so that the corner structure is preserved when partially furled.
Foam or Rope Luff
Once partially furled, the halyard can no longer be used to add luff tension as the breeze builds. Strips of foam or rope, offset slightly from the luff to allow for easy rolling, increase the size of the roll. This effectively helps maintain tension on the fabric, preserving luff tension and keeping the shape farther forward where it belongs.
When fully furled, the exposed edge along the leech and foot must be protected. Traditional acrylic (sunbrella) or UV coated woven polyester can be used.
Telltales, leech and foot lines with protective pouches, spreader and stanchion patches, reef-reduction reference marks, draft stripes, and sail bag.
How much can a sail be partially furled?
Structurally, (in terms of remaining intact as a triangle), a sail can be engineered to be furled to any size. (The sail will get heavier). From a shaping perspective, the quality of the airfoil deteriorates proportionally with the amount it is reefed. Generally speaking, it is best not to reef more than 30% of the foot length (beyond the reef reduction patches) to maintain effective sail shape. For example: a 150% Furling Genoa can be reduced to a foot length of approximately 120%.