Design


Quinny Houry

Sail Designer

As the head designer at Doyle sails UK , Quinny’s vast knowledge and unrivaled experience on yacht sails is key to Doyle Uk's engineering and design excellence. Being part of the design team for the Doyle world wide group Quinny project manages and has hands on experience with every sail produced in Doyle UK. Prior to taking on Doyle sails UK he was the head of Superyacht design and engineering at Doyle NZ and was involved with several leading European sailmakers in both design and engineering. His experience over 21 years has helped make Doyle the leading choice of Superyacht sails with a growing reputation in the Grandprix and racing markets. Quinny is undoubtedly one of the most well know personalities within the sailmaking industry and a offers unique design experience.

Richard Bouzaid

Doyle Design Team Head

Team coordinator and head designer. Oversees and coordinates design team activities, R&D efforts and sign off on final designs. Involved in sailmaking for 20 years. Winner Whitbread Race and America's Cup (sail coordinator and sail design team for both projects). Designer for many one design and maxi yacht programmes having won many of the biggest offshore and local events.

Doyle have once again been first in leading sail design software. For 2 years now Doyle have been utilizing the world leading sail design software "Sailpak", which has the ability to 3 dimensionally model any sail at the actual flying shape onboard the boat, and combined with various sail combinations and settings. The next generation in saildesign is now available when purchasing sails from Doyle NZ. With Sailpack-Viewer the Doyle sail designer can create a single file (PPK) with all the sails and rig together in an active 3D view. The customer will be able to see, from any point of view and with multiple options of rendering (geometry, mould aspect, paneling and/or full description with finishing details), his/her personally designed sail.

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One of the cornerstones of our sail making success is a sophisticated and thorough approach to design and engineering. Before any fibre gets laid or cloth cut, we complete a detailed analysis of the boat, rig and hardware to fully understand the is needed to make sails that will fulfill the owners requirements. Time and time again our clients have found this approach to be an invaluable aid to ensuring their vessel is correctly and safely engineered and optimized for the best performance possible. This approach in combination with extensive expertise has given us the confidence to take on even the biggest and most complex large yacht projects in the world.

The Doyle Sails expert design teams are led by Richard Bouzaid and will incorporate various specialist members of the design team at Doyle Sails for different stages of the analysis.

The FEA analysis for the sails is done using Sailpack software coupled with K-Epislon’s Aravanti software, which has been specifically developed for the performance and structural evaluation of sails using Fluid-structure interaction. The software uses our design from Sailpack and creates both aerodynamic and structural meshes for analysing. By using this tool we can establish a range of information that is invaluable to the yacht designer, rig manufacturer and deck hardware suppliers. The process is as follows:


1) A full 3D model of the yacht is developed, including rig structure and properties of cables and sheets. Sails are designed in place on to this working model including the first estimation of sail structure and shape design.

2) Aero analysis is run to give the pressure map (on which the initial structure analysis is run) and performance data on the moulded sail shapes, including heeling moments used to confirm wind ranges for the sails.

3) Structural analysis (FEA) is run on the moulded sail shapes using the pressure map and shows the deformed sail shape, sail loads and the stress and strain on the membrane for the layout and fibre density used. This also incorporates the effect on the sails from the available headstay tension and mastbend, and shows where in the membrane we would expect to see any wrinkling, distortion and overloading. Within the available setup options here we can ‘trim’ the sails, change corner tensions, change forestay tension, backstay tension, runners and see the effects of these changes to both the shape and the loads and membrane elongation.

4) As the sails change from what is the moulded shape to the now flying shape, the forces on the sail are now different to what all of the previous calculations have been based upon. Now that the flying shape has been calculated this process starts again at the beginning with a new aerodynamic analysis of the flying shape.

A new pressure map and heeling moment is calculated and the structural process starts again based on the new pressure map. This new iteration will continue until a reasonable variance between runs is achieved, typically a deformation max difference between iterations of 0.02%.

For a detailed look at the materials used in our sails, please Click here.
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