Continuos Yarns Composite Sails

Durable, reliable and sustainable

In 2007, OneSails introduced the first continuous fibre sails built without the use of resin or glue, eliminating delamination issues at a stroke. Now OneSails goes a step further, by introducing 4T FORTE™ membranes made from exclusive Multi Micro Structure (MMS™) technology (patent pending).

The 4T FORTE™ composite structure incorporates high modulus fibres such as STR™ Solid Stripes, a new low stretch component of MMS™ technology which eliminates both glue and the mylar film, so often the weak element of a laminate sail. Using a multi micro layered structure, elements of the membrane are fused together in a cross linked, polymerised matrix resulting in a stable, stretch resistant, and durable sail. By doing away with both glue and mylar film these sails are significantly lighter than conventional laminate sails.

Not only is 4T FORTE™ intrinsically lighter than alternatives, but weight saving is enhanced by the fact that a 4T FORTE™ membrane does not need to be covered with extra woven taffeta fabric to protect it from UV or improve durability.

A core structural grid, constructed from high modulus fibre takes care of the principal loads, whilst oriented micro layers provide strength in other secondary directions. The entire skin is encapsulated between ripstop “shields”, which are UV, moisture, and mildew resistant.

The whole skin, with its continuous fibres, is vacuum cured in a heat activated cross polymerisation process. which fuses the components together so that every single element in the structure contributes to shape holding. As a result, a 4T FORTE™ sail membrane not only exhibits superior structural integrity, but the use of more efficient components creates a sail up to 25% lighter than film based alternatives.

THE NEXT GENERATION OF COMPOSITE MEMBRANES​​

Learn more about the revolutionary technology of making 4T FORTE™ membranes.

The superior structural
integrity of the continuous yarns
composite technology

A core structural grid, constructed from high modulus fibre takes care of the principal loads, whilst oriented micro layers provide strength in other secondary directions. The entire skin is encapsulated between ripstop “shields”, which are UV, moisture, and mildew resistant.

Exclusive features

OneSails 4T FORTE™ sails are simply the best sails available in the market in terms of quality, technology, shape holding and durability. These sails carry as standard a number of exclusive features that significantly increase their performance, lightness and ease of use:

  • Single piece sails without size limits
  • Composite laminate made by multi micro MMS
  • Technology (Pat. Pending) layers structure vacuum fused together in a cross linked polymerised matrix
  • Thermo moulded process
  • Continuous STR Solid Stripes™
  • Soft corner finishing
  • OneSD™ microchip
  • Integrated reinforcements
  • Luff customized to mast/boom or headstay system
  • Integrated batten pockets
  • Dyneema leechline and footline
  • RBS epoxy «E-glass» battens
  • Batten pockets with easy V closure
  • Integrated spreader patches
  • Custom sailbag

Racing & Grand Prix

4T FORTE™

225R*

325 R

REFERENCE: top mylar membranes

Structural yarns

STR Solid Stripes™ High Modulus

STR Solid Stripes™ High Modulus

Carbon

Color

Black

Black

Clear film

Main structure modulus

210

245

210

UV stability proportion

1,6

1,9

1

 

*(225R suitable for boats up to 47′)

Grand Prix

4T FORTE™

325 R

REFERENCE: top mylar membranes

Structural yarns

STR Solid Stripes™ High Modulus

Carbon

Color

Black

Clear film

Main structure modulus

245

210

UV stability proportion

1,7

1

Cruising & Performance Cruising

4T FORTE™

220C

200E*

320C

REFERENCE: top taffetà membranes

Structural yarns

STR Solid Stripes™ High Modulus

STR Solid Stripes™ High Modulus

STR Solid Stripes™ High Modulus

Carbon

Color

Light grey

Light grey

Dark gray

Different colors

Main structure modulus

210

190

245

210

UV stability proportion

1,5

1,5

1,5

1

 

*(220C suitable for boats up to 47′)

**(200E suitable for boats up to 39′)

STR Solid Stripes™ replacing carbon and aramid yarns

After many years of carbon being the ultimate fibre in sailmaking, OneSails has introduced STR Solid Stripes™ with a better strength/weight ratio than carbon and a huge number of other advantages including being more robust, having higher tenacity and a full resistance to the harsh factors of the marine environment such as UV, temperature and moisture.

STR Solid Stripes™ High Modulus specifications

 

STR Solid Stripes™ High Modulus

CARBON High Modulus

CARBON

DYNEEMA

TWARON High Modulus

BLACK TECHNORA

Specific modulus (N/tex)

185

162

134

110

105

53

Load / weight ratio

1

0,88

0,72

0,59

0,39

0,29

UV stability

Tenacity

Flex Loss

Creep free

Moisture resistance

Carbon Footprint

4T Forte

4T Forte

4T FORTE™ are the first “green sails”

The OneSails group has a shared passion for sailing and the sea. Respect for the environment keeps us focused on how we can continually improve the sustainability of our sails.

Our commitment to reducing the carbon footprint of our sails is centred on the materials and what happens to a sail at the end of its life. In 2015, OneSails launched 4T FORTE ™ sails and sail recycling process. Awarded ISO 14040 Life Cycle Assessment Certification, 4T FORTE ™ are the only fully recyclable sails on the market today.

Membranes and their assembly have been engineered for highest standards in terms of environmental impact and recyclable options. Glues, resins and solvents have been replaced by heat fusion and the base polymer is 100% recyclable in a standard waste separation process.

1.

MANUFACTURING
PLANT

Holds to the highest standards of environmental practices and the responsible sourcing of materials and energy sources.

2.

PRODUCTION

Sails made of 4T FORTE are produced with a low level of CO2 emissions into the atmosphere and without the use of pollutants such as glues, resins and solvents.

3.

DISPOSAL

At the end of their useful life, these sails are recycled within the normal recovery processes of polyethylene-based raw materials to generate the PE pellet.

4.

RECOVERY

The polyethylene pellet is used for the production of accessories (such as headboards) to be used in the production of new sails.

OneSails' Vendéé Globe sails recycled into markers

For the first time ever!
Over 10 years of research and development have led to the creation of sails that win in regattas, last over time, have low CO2 emissions during production and can be recycled at the end of their life.
From this idea were born the MARKERS deriving from the sails used in the Vendée Globe by Pip Hare made by @carioca_italia

A certified commitment

We strongly believe in sustainability. Our commitment is concrete and certified according to: ISO 14021:2021 and ISO 14001:2015 by independent auditors (IQNet).

Integrated Solar Panel Technology, taking sustainability one step further

OneSails can deliver 4T FORTE™ main sails with integrated thin cell PV panels, which regenerate the yacht’s batteries using solar energy.

Due to the high modulus construction of the 4T FORTE™ composite material, the impact of the PV panels is minimal in terms of the sail’s characteristics and performance.

For example, the Spirit 44CR(e) is a fully electric yacht designed and built by Spirit Yachts. To fit with the owner’s brief of ‘near total self-sufficiency’, OneSails worked closely with Spirit Yachts and Solar Cloth to integrate solar panels into the 4T FORTE recyclable mainsail. The three panels on each side of the sail have the capacity to regenerate 560watts, or 1,120watts total for both sides of the sail. Solar panel technology is always improving and OneSails is continually testing and developing new solutions.

Why Choose OneSails

1. Exclusive Technology

For over 15 years the OneSails design team have developed exclusive technologies to make one-piece continuous thread sails a reality for cruising and racing boats.

2. Performance

Features like weight, shape control and deformation resistance means better performance compared to traditional panelled sails.

3. Quality

Sails are designed and manufactured to the very highest standards from carefully selected components to ensure the very highest quality and durability. 4T FORTE™ membranes are exclusively made in Italy. All the assembly process is completely made in a unique factory ensuring the meeting of all the required standards.

4. Design

The best sail shapes are the result of continuous analysis and experience. OneSails is at the forefront of the sailmaking industry, continually investing in research and development to ensure that the very best sail shapes are available. The success of this approach is confirmed by the vast array of racing trophies OneSails clients have won, competing at National, International and World Championship level.

5. Service

A core activity for every OneSails Loft is providing first class service, support and assistance. As part of our service commitment, each OneSails Loft has a team of experts on hand to ensure that we can deliver on our service pledge. In addition to a growing number of principle lofts, the OneSails Group has an extensive network of service centres strategically placed worldwide’s coast line.