Multihull Racing Upwind Sails

Tri-Radial Sails

Tri-radial Sail Construction

Tri-radial sails utilize panels of pre-made materials radiating from the three corners of the sail. The length, or “warp” fibers of the material are oriented to align with the primary load paths. Better alignment creates lower stretch improving shape holding. Tri-radials provide a performance upgrade for those who are looking for more than what a classic woven polyester sail can provide.

Designed for Maximum Control

When it comes to boat handling and speed, it’s sail shape that makes the difference. To achieve the ideal shape, Quantum’s sail designers use proprietary computational tools, part of the as iQ Technology® suite, to create custom shaping, tailored on a sail-by-sail basis to expected usage and boat-specific constraints such as mast bend, displacement, and righting moment. Sail shapes feature a smooth, flat aerodynamic profile for optimum upwind performance, with an open trailing edge to reduce heeling and weather helm.

The Right Materials

There is a broad spectrum of material options for use in tri radial sails, ranging from simple woven materials, to custom composites and they are available from a variety of suppliers. In general, there are three categories:

  • Woven Radial: Woven polyester specially designed with strength in the long (warp) direction so they can be used in tri-radial panel configuration. Compared to cross-cut woven polyester, this material offers 10 to 20% less stretch due to the material and the efficiency of the panel layout. Works well on boats up to 30’.

  • Polyester Composites: Layered construction featuring large, straight, untwisted polyester yarns (scrim) sandwiched between two layers of polyester film. They can use exterior skins of woven polyester taffetas on one or both sides for additional durability. The fiber network does the work of resisting stretch, augmented by a layer of polyester film for balance, while the woven taffetas provide rugged protection against, UV, tear, and chafe. Compared to cross-cut woven polyester, these materials offer as much as 40 to 50% better stretch resistance. Ideal for boats up to 40’

  • High Modulus Composites: Identical to polyester composites except the fiber network consist of high-modulus fibers like Spectra®, carbon, or aramid, with the dramatically reduced stretch these fibers provide. Depending on fiber type and compared to cross-cut woven polyester, these materials offer four to five times better stretch resistance. Ideal for larger boats up to 80’.



 

Tri-Radial TR 3800

Tri-Radial TR 3800

Series 3800 utilizes tri-radial construction with pre-made high modulus composite materials featuring carbon, aramid and Spectra® fiber networks. There is a wide variety of material options available in this series. Boat size and expected usage will dictate material choice.

Boat Size

40-80'

Construction

Tri-radial

Material

High modulus composites with carbon/aramid blends and taffeta exterior skins

Sail Color

White with black internal fiber network

Strength/Weight Ratio
 
5
Ease of Trim
 
5
Control of Heel
 
5
Upwind Performance
 
5
Wind Range Versatility
 
5
UV Resistance
 
2
Fiber Resistance to Flogging
 
5
Durability
 
4
Optimal Shape Retention
 
5
Cost
 
5
Tri-Radial TR 3600

Tri-Radial TR 3600

Series 3600 utilizes tri-radial construction with pre-made polyester composite materials. Large, unwoven polyester fibers (scrim) are sandwiched between exterior layers of woven polyester (taffeta). A polyester film provides off threadline (bias) stability.

Boat Size

40' and under

Construction

Tri-radial

Material

Polyester composites with taffeta exterior skins

Sail Color

White

Strength/Weight Ratio
 
3
Ease of Trim
 
4
Control of Heel
 
4
Upwind Performance
 
4
Wind Range Versatility
 
4
UV Resistance
 
3
Fiber Resistance to Flogging
 
4
Durability
 
4
Optimal Shape Retention
 
4
Cost
 
3
Tri-Radial TR 3200

Tri-Radial TR 3200

Series 3200 utilizes tri-radial construction with special warp-oriented woven polyester materials. Radial woven materials can be oriented to better align with sail loadings than in a traditional cross-cut configuration providing a modest increase in ability to resist stretch with the proven re-liability of woven construction.

Boat Size

30' and under

Construction

Tri-radial

Material

Warp-oriented woven radial polyester or Spectra® reinforced woven radial

Sail Color

White

Strength/Weight Ratio
 
2
Ease of Trim
 
3
Control of Heel
 
3
Upwind Performance
 
3
Wind Range Versatility
 
3
UV Resistance
 
5
Fiber Resistance to Flogging
 
3
Durability
 
4
Optimal Shape Retention
 
3
Cost
 
2