Sail related

Sails for M Class



These sails conform in all respects to the current IRSA Marblehead Class Rules. Two main/headsail ratios are provided; 'O' SERIES 62%:38% and 'V' SERIES 59%:41% (based on their measured areas). The seam shaping and/or luff curve of SERIES sails can always be varied to suit a customer's individual taste e.g. more or less camber or mast bend. Marblehead SERIES sails are normally despatched within four weeks of receipt of your order. At the list price all mainsails may be finished with EYELET or CORD luff finish (for GROOVY mast, SLIDES where appropriate). For an additional charge a SMALL POCKET for jackstay can be fitted. Some mainsails may be finished with a large pocket on the luff - see POCKET LUFF MAINSAILS. POCKET LUFF sails can be rolled successfully for delivery.

And if none of these suits matches my requirements?

If none of the SERIES sails matches your exact requirements, a CUSTOM suit can be made specially.

The options

Sail types


Normally made of polyester laminate; mainsails are fitted with a headboard and luff finish as requested. Battens are fitted to comply with relevant class rules and as necessary. Mains and headsails each consist of a single panel of cloth and the luffs are shaped. The lack of shaping makes them suitable only for very small storm suits or non-competition models.


Made of 75 micron film. Fabrication from separate panels permits an extra degree of freedom in shaping the sails during construction. Mainsails comprice four panels, headsails comprise three panels. 


For best light airs performance, made of 50 micron film with a panel of 75 micron film at the mainsail clew. Constructed from light film except in the clew where local reinforcement is achieved by using heavier film. Seams are not sewn.

Shaping & materials


The shaping built into these sails has evolved over a long period of time and many generations of design. It has been ‘rationalised’ and even non standard size sails can be built with the normal shaping which we call F2. We can also make sails with proportionately more or less camber. For convenience we call sails with 17% more camber F3 sails. F1 sails have 17% less camber.

MATERIALS - film & woven - non standard materials 

Usually 75 micrion film is perfectly strong and stable enough for the smallest sails for 10R Class. However, laminate cloths remains the best choice where sails intended for use in stronger winds will be exposed to rough treatment, for example if they have to be removed from the mast when sail changing. For lighter winds there are many thicknesses and types of film available. These will produce smooth, stable, stretch resistant, sails that will give excellent performance for years if cared for. Keeping your rigs in a rig box will greatly extend the useful life of sails.


We make your sails with the shaping and the material we consider best - all prices are based on this assumption -  You choose and specify the shaping and materials - there is an additional charge for this

Luff finish



A small pocket formed by a coloured, narrow, folded tape. It is essential to pass a wire forestay through this pocket before use - avoid damage - smooth the sharp end of the wire first.


A custom luff finish can be provided for the additional charge


EYELETS - for luff rings or cord ties; circa 250 - 500 mm spacing
CORD - for sails made of woven Dacron used on GROOVY mast
SLIDES - for sails made of film used on GROOVY mast
HOOKS - for a jackstay; circa 150 - 250 mm spacing
SMALL POCKET - for a jackstay inside the luff tabling
LARGE POCKET - for a mast inside the luff

Please note

Sail prices quoted below are for EYELET or CORD mainsail luff finish. Where appropriate (LIGHTWEIGHT sails for GROOVY masts), SLIDES are fitted instead of a CORD luff at no extra charge to help the sail work well at very low wind speeds.


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