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All Purpose: truly “Made in France”


Selection of fabric, definition of shape, optimised triangulation based on class rules and/or rig, manufacture, finishing, testing and adjustment are all essential steps to producing successful sails

Listen to the customer: sails designed in close collaboration with the end-user

The first essential step in designing a sail is to listen to the customer, share experience, and gain a thorough understanding of requirements.  We are deeply committed to designing sails in close collaboration with our customers

Which fabric for which programme?

An in-depth analysis of goals and constraints, as well as the particular characteristics of each boat enables All Purpose to select the right materials. A mainsail can be composed of several different fabrics and numerous fibres.
There are three kinds of  fabrics :
  • woven
  • unidirectional fibres
  • multiaxial fibres such as Trilam®
Fibres :
• Polyester, Pentex : mainly used in cruising sails or racing sails where the type of fabric is restricted by the class rules.
• Kevlar and Twaron (aramids), coated for UV protection. Often combined with fibres that are less sensitive to UV such as Dyneema or Black Technora.
• Black Technora (aramid) coated for UV protection
• Dyneema / Spectra (high modulus polyethylenes). Good resistance to UV and flex, very strong and durable, tear-resistant. Creep sensitive (stretch under long-term load).
• Vectran. Liquid crystal polymer from the polyester family. Flex-resistant. 
• Carbon. Very low flex resistance, therefore not particularly adapted to sailcloth.

Fiber Initial modulus grams denier Flex loss (%) UV resistance  Elongation at break
Polyester 100 No effect 6 months 8%
Pentex 260 No effect 6 months 6%
Black technora 540 7% 3-4 months 4,2%
Kevlar 49 895 25% 2-3 months 1,5%
Twaron 880 25% 2-3 months 1,5%
Dynema 1050 No effect 6-7 months 3,5%
Spectra 1250 No effect 6-7 months 5%
Carbone 1350 100% No effect 1,2%

Measurement :

All Purpose can visit your boat to take measurements.
Download measurements sheets as follow :

Sail design software

The design office dedicates a great deal of time to the design of sails with the help of specialist software tools:
  • Sailect by Optima is used in the pre-design stage to visualise the range of use of a particular sail, the wind angles and wind strength for which the sail needs to be designed. Post-design, this software provides the sailor with reliable data and is used to validate options.  
    Click on the image to zoom in
Logiciel Sailect d'Optima
  • Sailpack boat  Module creates a realistic simulation of the boat, rig and rigging to define mast bend and optimise mainsail luff curve and geometry. 
    Please click on the bottom right corner of the video to view it in full screen

  • Sailpack shape 3D allows designers to design a sail in 3D. The designers at All Purpose are first and foremost experienced sailors. They all use the SailPack Sail Design software, leader in its field. There is a constant flow of information and experience between the design offices within the group, essential to producing the best possible sails.
    Please click on the bottom right corner of the video to view it in full screen

  • Sailpack Aero simulates flow over the sail plan, validates aspect ratio, tests different mainsail roach sizes, and confirms the positioning of sails with the naval architect.
    Click on the image to zoom in
Logiciel sailpack module aero
  • Structural analysis
    Our close collaboration with Peter Hepel allows us to access the Relax 2 software. When interfaced with SailPack, we can simulate a sail under pressure and observe its distortion depending on its panel and thread layout. This tool gives us a deeper understanding of the mechanisms of membranes (Trilam ®).
    Click on the image to zoom in
Logiciel Relax2 Peter Heppel
  • Panel and fibre layout
    Cross-cut, tri-radial cut, membrane
    Click on the image to zoom in
Plan de fils d'une grand voile



The latest technology combined with craftsmanship

All Purpose combines the latest technology with true craftsmanship, working with traditional manufacturing methods to provide the greatest customisation and quality possible.


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