A nautical practice consistent with sustainable development objective.

WINDYAK  intends to fill the environment-friendly boat slot in the market.

  • WINDYAK addresses the warming gas reduction issue by proposing a craft offering various interesting uses on any water place including inland ones : this can be a mean to incite people to reduce their leisure travels.
  • WINDYAK addresses the warming gas reduction issue by proposing a craft offering various interesting uses on any water place including inland ones : this can be a mean to incite people to reduce their leisure travels.
  • The use of the boat will be well suited to an environmental-oriented project, or as trial in a multi-sport nature competition like Eco-challenge.
  • Even if at the moment WINDYAK  (5.05m & 5.9m) is built with non fully recyclable materials (composite), her building and carrying, thanks to her light weight, has limited environmental impact: A comparable catamaran in term of capacity weights about 120 kilograms, WINDYAK only the half: She thus is also much more easy to handle and carry to water.
  • We are currently studying a small boat (length 4,2m), allowing to implement a building process showing lower intrinsic structural performances (weight to strength&stifness ratios), while keeping at the same time lightness which is a key stone of the concept. This limited size opens up new horizons for use of materials like polyethylene (or other thermoplastics) having reduced production costs for mass production, and which are in addition more easy to recycle than thermoset composite.
  • An innovative and accomplished concept resulting from gained experience.

    • From initial idea a few years ago, we have been imagining, designing, building and testing numerous technical issues.

      We propose you today:

    • a consistent and satisfying solution, for both sailing and paddling.
    • A simplified definition, and well-identified building process.

    A long-life and quality building to get lightness

Limited weight requirement can not yet been fulfilled at the moment, for large structures, when using natural fibres available on the market (hamp, linen). To reach this mass target, we have perfected a high-quality sandwich structure for our ‘big’ products: glass & kevlar hull and glass deck, built using infusion process.

  • Principle is quite simple: Once glass fibre and kevlar fibre fabrics are laid-up ‘dry’ in the mould, a resin inlet tube is placed at the centre of the part; an air sucking up device is arranged on the rim of the mould to be connected to a vacuum pump. The whole assembly, covered by an airproof vacuum bag, is set under vacuum. Building the hull (or deck) will only consist of opening inlet line by plunging the tube into the resin pot. Sucked-up by vacuum, resin is going to ‘infuse’ (=to impregnate) fabrics.

Moulage de la coque par infusion - Hull molding using infusion processMoulage de la coque par infusion (détail) - Hull molding using infusion process (detail)Moulage du pont par infusion (détail) - Deck moulding using infusion process (detail)

  • This process allows to reduce the amount of resin absorbed by fabrics (and thus the mass of built parts), and to improve quality of obtained composite ( no bubbles remain in final laminate). Furthermore, it nearly removes all volatil organic compound emissions existing when using hand lay-up with open mould; This, with direct benefit for environment and operators health & safety.
  • Note : infusion process requires that laminate includes a resin transfer medium alowing resin to easily move forward when fabrics are submitted to vacuum pressureen infusion. WINDYAK uses as medium the SORICĂą core which is the best available compromise for our application between final product performance (strength to weight ratio) and environmental and economical requirements, thanks to:
  • Manpower saving: easy lay-up (just as a usual fabric) of the sandwich core for complex shapes, no need of additional peel ply nor transfer medium net to be laid-up & removed after polymerisation.
  • Reduction of sacrificial materials (no peel ply nor transfer medium net) and total resin quantity used (no waste in transfer medium net).



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