75 Years of crafting the best cruising sails

The Full Square Head

Why choose a full square head mainsail?

Challenge

  • Your multihull feels underpowered
  • You may also want to race

Result

  • Top performance
  • More power even when reefed down
  • Higher off-wind efficiency
Catamarn Full Square Head Mainsail
Full Square Head Mainsail

May we introduce

The Full Square Head Mainsail

The full square head mainsail takes the concept of the large or max-roach mainsail to its logical conclusion. This type of sail is common on most Grand Prix racing yachts, offshore or inshore, where only performance counts. This type of sail delivers flexible power, increasing sail area and power in the top third of the mainsail but feathering away to leeward when a gust hits, instantly de-powering the main. The advanced sail design takes full advantage of the long traveler on the wide catamaran base.

For the average family or cruising sailor, this sail can be a handful to handle. The top and diagonal battens needed to support the square top are inconvenient and impractical when lowering and stowing the sail on the boom, unless a system for detaching the head of the sail from the mast is fitted. For professional offshore racing, this obviously is irrelevant as the main stays up the entire duration of the race, no matter how long it may be.

What's in the box?

Standard Specifications

Optional

1 Full Square Head Mainsail
Your sail will be carefully designed, inspected, packaged, and shipped.

Compare Our Multihull Sails

Material
Premium Dacron
Performance
75%
Durability
90%
Price
$$
Colors
Material
Premium Dacron, Hybrid Dynema
Performance
80%
Durability
80%
Price
$$$
Colors

Full Square Head Mainsail

Catamarn Full Square Head Mainsail
Material
Premium Dacron, Hybrid Dynema
Performance
85%
Durability
70%
Price
$$$$
Colors
Material
Premium Dacron
Performance
75%
Durability
90%
Price
$$
Colors
Material
Premium Dacron, Laminate
Performance
85%
Durability
80%
Price
$$$
Colors
code zero lagoon 46 catamaran 04
Joe Fox, TMG Yachts
5/5
Well made, easy to operate and a gamechanger
We have ordered a number of Code 0 sails now from Greg and Sam at RTS Australia for both company use and client vessels. The service has been excellent, professional and always a prompt reply. The loft is helpful with meeting production requirements and sails are always delivered on time. For a good quality good value sail you don’t need to look past RTS. After sales support and advise is always forthcoming when needed and Greg and Sam come with a huge amount of hands-on experience which goes a very long way. The Code 0 itself is well made, easy to operate and a gamechanger on all the vessels well have fitted them on.

Choose your Sail

Required Measurements

mainsail measuring form
Download Mainsail Form PDF
This is how it’s done

Buying New Sails has Never Been Easier

2 Full Square Head Mainsail

Choose your sails and get a quote

Fill in the form as far as you like, hit send and get the ball rolling.

3 Full Square Head Mainsail

We contact you within a few weekdays

To answer all your questions and advise you on your individual sail. You will then also get your final quote.

4 Full Square Head Mainsail

We deliver your new sail swiftly

Depending on your location and time of ordering, you will receive your new sails within a few weeks.

5 Full Square Head Mainsail

Enjoy your sailing!

Hoist your brand-new sails and enjoy a whole new sailing experience.

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