Sail Rigs And Types - The Only Guide You Need

Different Sail Types

It is perhaps worth noting that a sailboat is only as good as its sails. The very heart of sailing comes in capturing the wind using artfully trimmed sails and turning that into motion. . Ask any good sailor and he'll tell you that knowing how and when to trim the sails efficiently will not only improve the overall performance of your boat but will elevate your sailing experience. In short, sails are the driving force of sailboats.

As such, it's only natural that you should know the different types of sails and how they work. Let's first highlight different sail types before going into the details.

• ‍Mainsail
• Jib - triangular staysail
• Spinnaker - huge balloon-shaped downwind sail for light airs
• Genoa - huge jib that overlaps the mainsail
• Gennaker - a combination of a spinnaker and genoa
• Code zero - reaching genoa for light air 
• Windseeker - tall, narrow, high-clewed, and lightweight jib
• Drifter - versatile light air genoa made from particularly lightweight cloth
• Storm jib - a smaller jib meant for stormy conditions
• Trysail - This is a smaller front-and-aft sail for heavy weather

Mainsail

The mainsail is the principal sail on a boat. It's generally set aft of the mainmast. Working together with the jib, the mainsail is designed to create the lift that drives the sailboat windward. That being said, the mainsail is a very powerful component that must always be kept under control.

As the largest sail, and the geometric center of effort on the boat, the mainsail is tasked with capturing the bulk of the wind that's required to propel the sailboat. The foot, the term for the bottom of any sail, secures to the boom, which allows you to trim the sail to your heading. The luff, the leading edge of the sail, is attached to the mast. An idealized mainsail would be able to swing through trim range of 180°, the full semi-circle aft of the mast, though in reality, most larger boats don’t support this full range of motion, as a fully eased sail can occasionally be unstable in heavy breeze.

. As fully controlling the shape of the mainsail is crucial to sailing performance, there are many different basic mainsail configurations. For instance, you can get a full-batten mainsail, a regular mainsail with short battens, or a two-plus-two mainsail with two full-length battens. Hyper-high performance boats have even begun experimenting with winged sails which are essentially trimmable airplane wings! Moreover, there are numerous sail controls that change the shape by pulling at different points on the sail, boom, or mast. Reefing, for instance, allows you to shorten the sail vertically, reducing the amount of sail area when the boat is overpowered.

Features of a Mainsail

Several features will affect how a particular sail works and performs. Some features will, of course, affect the cost of the sail while others may affect its longevity. All in all, it's essential to decide the type of mainsail that's right for you and your sailing application.

Sail Battens, the Roach, and the Leech

The most difficult part of the sail to control, but also the most important, are the areas we refer to as the leech and the roach. The roach is the part of the sail that extends backwards past the shortest line between the clew, at the end of the boom, and the top of the mast. It makes up roughly the back third of the sail. The leech is the trailing edge of the sail, the backmost curve of the roach. Together, these two components control the flow of the air off the back of the sail, which greatly affects the overall sail performance. If the air stalls off the backside of the sail, you will find a great loss in performance. Many sail controls, including the boom vang, backstay, main halyard, and even the cunningham, to name a few, focus on keeping this curve perfect. 

As for parts of the sail itself, battens control the overall horizontal shape of the sail. Battens are typically made from fiberglass or wood and are built into batten pockets. They're meant to offer support and tension to maintain the sail shape Depending on the sail technology you want to use, you may find that full battens, which extend from luff to leech, or short battens, just on the trailing edge, are the way to go. Fully battened sails tend to be more expensive, but also higher performance.

Fully Battened Mainsails

They're generally popular on racing multihulls as they give you a nice solid sail shape which is crucial at high speeds. In cruising sailboats, fully battened mainsails have a few benefits such as:

• They prevent the mainsail from ragging. This extends the life of the sail, and makes maneuvers and trimming easier for the crew.
• It provides shape and lift in light-air conditions where short-battened mainsails would collapse.

On the other hand, fully-battened mainsails are often heavier, made out of thicker material, and can chafe against the standing rigging with more force when sailing off the wind.

Short Battens

On the other hand, you can choose a mainsail design that relies mostly on short battens, towards the leech of the sail. This tends to work for lighter cloth sails, as the breeze, the headsail, and the rigging help to shape the sail simply by the tension of the rig and the flow of the wind. The battens on the leech help to preserve the shape of the sail in the crucial area where the air is flowing off the back of the sail, keeping you from stalling out the entire rig.

The only potential downside is that these short battens deal with a little bit of chafe and tension in their pockets, and the sail cloth around these areas ought to be reinforced. If your sails do not have sufficient reinforcement here, or you run into any issues related to batten chafe, a good sail maker should be able to help you extend the life of your sails for much less than the price of a new set.

How to Hoist the Mainsail

Here's how to hoist the mainsail, assuming that it relies on a slab reefing system and lazy jacks and doesn't have an in-mast or in-boom furling system.

• ‍Maintain enough speed for steeragewhile heading up into the wind
• Slacken the mainsheet, boom vang, and cunningham
• Make sure that the lazy jacks do not catch the ends on the battens by pulling the lazy jacks forward.
• Ensure that the reefing runs are free to run and the proper reefs are set if necessary.
• Raise the halyard as far as you can depending on pre-set reefs.
• Tension the halyard to a point where a crease begins to form along the front edge
• Re-set the lazy jacks
• Trim the mainsail properly while heading off to your desired course

So what's Right for You?

Your mainsail will depend on how you like sailing your boat and what you expect in terms of convenience and performance. That being said, first consult the options that the boatbuilder or sailmakers suggest for your rig. When choosing among the various options, consider what you want from the sail, how you like to sail, and how much you're willing to spend on the mainsail.

Headsails

The headsail is principally the front sail in a fore-and-aft rig. They're commonly triangular and are attached to or serve as the boat’s forestay. They include a jib and a genoa. 

Jib

A jib is a triangular sail that is set ahead of the foremost sail. For large boats, the roto-furling jib has become a common and convenient way to rig and store the jib. Often working in shifts with spinnakers, jibs are the main type of headsails on modern sailboats. Jibs take advantage of Bournoulli’s Principle to break the incoming breeze for the mainsail, greatly increasing the speed and point of any boat. By breaking the incoming wind and channeling it through what we call the ‘slot,’ the horizontal gap between the leech of the jib and the luff of the mainsail, the jib drastically increases the efficiency of your mainsail. It additionally balances the helm on your rudder by pulling the bow down, as the mainsail tends to pull the stern down. .

The main aim of the jib is to increase the sail area for a given mast size. It improves the aerodynamics of the mainsails so that your sailboat can catch more wind and thereby sail faster, especially in light air

Using Jibs on Modern Sailboats

In the modern contexts, jib’s mainly serve  increase the performance and overall stability of the mainsail. The jib can also reduce the turbulence of the mainsail on the leeward side.

On Traditional Vessels

Traditional vessels such as schooners have about three jibs. The topmast carried a jib topsail, the main foresail is called the jib, while the innermost jib is known as the staysail. The first two were employed almost exclusively by clipper ships.

How to Rig the Jibs

There are three basic ways to rig the jib.

Track Sheets - A relatively modern approach to the self-tacking jib, this entails placing all the trimming hardware on a sliding track forward of the mast. This means that on each tack, the hardware slides from one side of the boat to the other. This alleviates the need to switch sheets and preserves the trim angle on both sides, though it can be finnicky and introduce friction.

Sheet up the Mast - This is a very popular approach and for a good reason. Hoist the jib sheet up the mast high enough to ensure that there's the right tension through the tack. Whether internally or externally, the sheet returnsto the deck and then back to the cockpit just like the rest of the mast baselines. The fact the hardware doesn't move through the tacks is essential in reducing friction.

Sheet Forward - This method revolves around ensuring that the jib sheet stays under constant pressure so that it does not move through the blocks in the tacks. This is possible if the through-deck block is extremely close to the jib tack. Your only challenge will only be to return the sheet to the cockpit. This is, however, quite challenging and can cause significant friction.

Dual Sheeting - The traditional method, especially on smaller dinghies, though it is not self-tacking. This requires a two ended or two separate sheet system, where one sheet runs to a block on starboard, and the other to port. Whenever you tack or gybe, this means you have to switch which sheet is active and which is slack, which is ok for well crewed boats, but a potential issue on under-crewed boats.

Genoa

Another important headsail, a genoa is essentially a large jib that usually overlaps the mainsail or extends past the mast, especially when viewed from the other side. In the past, a genoa was known as the overlapping jib and is technically used on twin-mast boats and single-mast sloops such as ketches and yawls. A genoa has a large surface area, which is integral in increasing the speed of the vessel both in moderate and light winds.

Genoas are generally characterized by the percentage they cover. In most cases, sail racing classes stipulate the limit of a genoa size. In other words, genoas are usually classified by coverage.

Top-quality genoa trim is of great importance, especially if the wind is forward of the beam. This is because the wind will first pass over the genoa before the mainsail. As such, a wrongly sheeted genoa can erroneously direct the wind over the mainsail,spelling doom to your sailing escapades. While you can perfectly adjust the shape of a genoa using the mast rake, halyard tension, sheet tension, genoa car positioning, and backstay tension, furling and unfurling a genoa can be very challenging, especially in higher winds.

That being said, here are the crucial steps to always keep in mind.

Furling

• Unload and ease the loaded genoa sheet by going to a broad reach
• Do not use the winch; just pull on the furling line
• Keep a very small amount of pressure or tension on the loaded genoa sheet
• Secure the furling line and tighten the genoa sheets

Unfurling

• Get on the proper point of sail
• Have the crew help you and release the lazy genoa sheets
• Maintain a small tension while easing out the furling line
• Pull-on a loaded genoa sheet
• Close or cleat off the rope clutch when the genoa is unfurled
• Trim the genoa

To this end, it's important to note that genoas are popular in some racing classes. This is because they only categorize genoas based on the fore-triangle area covered, which essentially allows a genoa to significantly increase the actual sail area. On the contrary, keep in mind that tacking a genoa is quite a bit harder than a jib, as the overlapping area can get tangled with the mast and shrouds. It's, therefore, important to make sure that the genoa is carefully tended, particularly when tacking.

Downwind Sails

Modern sailboats are a lot easier to maneuver thanks to the fore-and-aft rig. Unfortunately, when sailing downwind they catch less wind, and downwind sails are a great way of reducing this problem. They include the spinnaker and the gennaker.

Spinnakers

A spinnaker will, without a doubt, increase your sailing enjoyment. But why are they often buried in the cabin of cruising boats? Well, the first few attempts to rig and set a spinnaker can be difficult without enough help and guidance. Provided a solid background, however, spinnakers are quite straightforward and easy to use and handle with teamwork and enough practice. More importantly, spinnakers can bring a light wind passage to life and can save your engine.

Spinnakers are purposely designed for sailing off the wind; they fill with wind and balloon out in front of your sailboat. Structured with a lightweight fabric such as nylon, the spinnaker is also known as a kite or chute, as they look like parachutes both in structure and appearance. 

A perfectly designed spinnaker should have taut leading edges when filled. This mitigates the risk of lifting and collapsing. A spinnaker should have a smooth curve when filled and devoid of depressions and bubbles that might be caused by the inconsistent stretching of the fabric. The idea here is that anything other than a smooth curve may reduce the lift and thereby reduce performance.

Types of Spinnakers

There are two main types of spinnakers: symmetric spinnakers and asymmetric spinnakers.

Asymmetric Spinnakers

Flown from a spinnaker pole or bowsprit fitted to the bow of the boat, asymmetric spinnakers resemble large jibs and have been around since the 19th century. The concept of asymmetric spinnaker revolves around attaching the tack of the spinnaker at the bow and pulling it around during a gybe.

Asymmetric spinnakers have two sheets just like a jib., These sheets are attached at the clew and never interact directly with the spinnaker pole. This is because the other corner of the spinnaker is fixed to the bowsprit. The asymmetric spinnaker works when you pull in one sheet while releasing the other. This makes it a lot easier to gybe but is less suited to sailing directly downwind. There is the loophole of having the asymmetric spinnaker gybed to the side opposite of the boom, so that the boat is sailing ‘wing-on-wing,’ though this is a more advanced maneuver, generally reserved for certain conditions and tactical racing situations.

On the contrary, the asymmetric spinnaker is perfect for fast planing dinghies. This is because such vessels have speeds that generate apparent wind forward. Because asymmetrics, by nature, prefer to sail shallower downwind angles, this apparent wind at high speeds makes the boat think that it is sailing higher than it really is, allowing you to drive a little lower off the breeze than normal. . In essence, the asymmetric spinnaker is vital if you're looking for easy handling.

Symmetric Spinnakers

Symmetric spinnakers are a classic sail type that has been used for centuries for controlling boats by lines known as a guy and a sheet. The guy, which is a windward line, is attached to the tack of the sail and stabilized by a spinnaker pole. The sheet, which is the leeward line, is attached to the clew of the spinnaker and is essential in controlling the shape of the spinnaker sail.

When set correctly, the leading edges of the symmetric spinnaker should be almost parallel to the wind. This is to ensure that the airflow over the leading edge remains attached. Generally, the spinnaker pole should be at the right angles to the apparent wind and requires a lot of care when packing.

The main disadvantage of this rig is the need to gybe the spinnaker pole whenever you gybe the boat. This is a complicated maneuver, and is one of the most common places for spinnakers to rip or get twisted. If, however, you can master this maneuver, you can sail at almost any angle downwind!

How to Use Spinnaker Effectively

If you decide to include the spinnakers to your sailboat, the sailmaker will want to know the type of boat you have, what kind of sailing you do, and where you sail. As such, the spinnaker that you end up with should be an excellent and all-round sail and should perform effectively off the breeze

The type of boat and where you'll be sailing will hugely influence the weight of your spinnaker cloth. In most cases, cruising spinnakers should be very light, so if you've decided to buy a spinnaker, make sure that it's designed per the type of your sailboat and where you will be sailing. Again, you can choose to go for something lighter and easier to set if you'll be sailing alone or with kids who are too young to help.

Setting up Spinnakers

One of the main reasons why sailors distrust spinnakers is because they don't know how to set them up. That being said, a perfectly working spinnaker starts with how you set it up and this revolves around how you carefully pack it and properly hook it up. You can do this by running the luff tapes and ensuring that the sails are not twisted when packed into the bag. If you are using large spinnakers, the best thing to do is make sure that they're set in stops to prevent the spinnakers from filling up with air before you even hoist them fully.

But even with that, you cannot fully set the spinnaker while sailing upwind. Make sure to bear away and have your pole ready to go as you turn downwind. You should then bear away to a reach before hoisting. Just don't hoist the spinnakers from the bow as this can move the weight of the crew and equipment forward.

Gennaker

Used when sailing downwind, a gennaker is asymmetric sail somewhere between a genoa and a spinnaker. It sets itself apart because it  gennaker is a free-flying asymmetric spinnaker but it is tacked to the bowsprit like the jib.

Let's put it into perspective. Even though the genoa is a great sail for racing and cruising, sailors realized that it was too small to be used in a race or for downwind sail and this is the main reason why the spinnaker was invented. While the spinnakers are large sails that can be used for downwind sail, they are quite difficult to handle especially if you're sailing shorthanded. As such, this is how a gennaker came to be: it gives you the best of both worlds.

Gennakers are stable and easy to fly and will add to your enjoyment and downwind performance.

The Shape of a Gennaker

As we've just noted, the gennaker is asymmetrical. It doesn't attach to the forestay like the genoa but has a permanent fitting from the mast to bow. It is rigged exactly like a spinnaker but its tack is fastened to the bowsprit. This is fundamentally an essential sail if you're looking for something to bridge the gap between a genoa and a spinnaker.

Setting a Gennaker

When cruising, the gennaker is set with the tack line from the bow, a halyard, and a sheet that's led to the aft quarter. Attach the tack to a furling unit and attach it to a fitting on the hull near the very front of the sailboat. You can then attach the halyard that will help in pulling it up to the top of the mast before attaching it to the clew. The halyard can then run back to the winches to make the controlling of the sail shape easier, just like when using the genoa sail.

In essence, a gennaker is a superb sail that will give you the maximum versatility of achieving the best of both a genoa and a spinnaker, especially when sailing downwind. This is particularly of great importance if you're cruising by autopilot or at night.

Light Air Sails

Even though downwind sails can be used as light air sails, not all light air sails can be used for downwind sailing. In other words, there's a level of difference between downwind sails and light air sails. Light air sails include code zero, windseeker, and drifter reacher.

Code Zero

A cross between an asymmetrical spinnaker and a genoa, a code zero is a highly modern sail type that's generally used when sailing close to the wind in light air. Although the initial idea of code zero was to make a larger genoa, it settled on a narrow and flat spinnaker while upholding the shape of a genoa.

Modern boats come with code zero sails that can be used as soon as the sailboat bears off close-hauled even a little bit. It has a nearly straight luff and is designed to be very flat for close reaching. This sail is designed to give your boat extra performance in light winds, especially in boats that do not have overlapping genoas. It also mitigates the problem of loss of power when you are reaching with a non-overlapping headsail. Really, it is closer to a light air jib that sacrifices a little angle for speed.

In many conditions, a code zero sail can go as high as a sailboat with just a jib. By hoisting a code zero, you'll initially have to foot off about 15 degrees to fill it and get the power that you require to heel and move the boat. The boat will not only speed up but will also allow you to put the bow up while also doing the same course as before you set the zero. In essence, code zero can be an efficient way of giving your boat about 30% more speed and this is exactly why it's a vital inventory item in racing sailboats.

When it comes to furling code zero, the best way to do it is through a top-down furling system as this will ensure that you never get a twist in the system.

Windseeker

Generally used when a full size and heavier sail doesn't stay stable or pressurized, a windseeker is a very light sail that's designed for drifting conditions. This is exactly why they're designed with a forgiving cloth to allow them to handle these challenging conditions.

The windseeker should be tacked at the headstay with two sheets on the clew. To help this sail fill in the doldrums, you can heel the boat to whatever the apparent leeward side is and let gravity help you maintain a good sail shape while reaching.The ideal angle of a windseeker should be about 60 degrees.

Though only used in very specific conditions, the windseeker is so good at this one job that it is worth the investment if you plan on a long cruise. Still, you can substitute most off the breeze sails for this in a pinch, with slightly less performance gain, likely with more sacrifices in angle to the breeze. 

Drifter Reacher

Many cruising sailors often get intimidated by the idea of setting and trimming a drifter if it's attached to the rig at only three corners or if it's free-flying. But whether or not a drifter is appropriate for your boat will hugely depend on your boat's rig, as well as other specific details such as your crew's ability to furl and unfurl the drifter and, of course, your intended cruising grounds.

But even with that, the drifter remains a time-honored sail that's handy and very versatile. Unlike other light air sails, the drifter perfectly carries on all points of sails as it allows the boat to sail close-hauled and to tack. It is also very easy to control when it's set and struck. In simpler terms, a drifter is principally a genoa that's built of lightweight fabric such as nylon. Regardless of the material, the drifter is a superb sail if you want to sail off a lee shore without using the genoa.

Stormsails

Generally stronger than other regular sails, stormsails are designed to handle winds of over 45 knots and are great when sailing in stormy conditions. They include a storm jib and a trysail.

Storm Jib

If you sail long and far enough, chances are you have or will soon be caught in stormy conditions. Under such conditions, storm jibs can be your insurance and you'll be better off if you have a storm jib that has the following features:

• Robustly constructed using heavyweight sailcloth
• Sized suitably for the boat
• Highly visible even in grey and white seas

That's not all; you should never go out there without a storm jib as this, together with the trysail, is the only sails that will be capable of weathering some of nature's most testing situations.

Storm jibs typically have high clews to give you the flexibility of sheet location. You can raise the sail with a spare halyard until its lead position is closed-hauled in the right position. In essence, storm jib is your insurance policy when out there sailing: you should always have it but always hope that you never have to use it.

Trysail

Also known as a spencer, a trysail is a small, bright orange, veritably bullet-proof, and triangular sail that's designed to save the boat's mainsail from winds over 45 knots and works in the same way as a storm jib. It is designed to enable you to make progress to windward even in strong and stormy winds.

Trysails generally use the same mast track as the mainsail but you have to introduce the slides into the gate from the head of the trysail.

Rig Types

There are two main types of rigs: the fore-and-aft rig and the square rigg.

Fore-and-aft Rig

This is a sailing rig that chiefly has the sails set along the lines of the keel and not perpendicular to it. It can be divided into three categories: Bermuda rig, Gaff rig, and Lateen rig.

Bermuda Rig - Also known as a Marconi rig, this is the typical configuration of most modern sailboats. It has been used since the 17th century and remains one of the most efficient types of rigs. The rig revolves around setting a triangular sail aft of the mast with the head raised to the top of the mast. The luff should run down the mast and be attached to the entire length.

Gaff Rig - This is the most popular fore-and-aft rig on vessels such as the schooner and barquentine. It revolves around having the sail four-cornered and controlled at its peak. In other words, the head of the mainsail is guided by a gaff.

Lateen Rig - This is a triangular fore-and-aft rig whereby a triangular sail is configured on a long yard that's mounted at a given angle of the mast while running in a fore-and-aft direction. Lateen rig is commonly used in the Indian Ocean and the Mediterranean.

Square Rigged

This is a rig whereby the mainsails are arranged in a horizontal spar so that they're square or vertical to the mast and the keel of the boat. The square rig is highly efficient when sailing downwind and was once very popular with ocean-going sailboats.

Conclusion

Unquestionably, sailing is always pleasurable. Imagine turning off the engine of your boat, hoisting the sails, and filling them with air! This is, without a doubt, a priceless moment that will make your boat keel and jump forward!

But being propelled by the noiseless motion of the wind and against the mighty currents and pounding waves of the seas require that you know various sail types and how to use them not just in propelling your boat but also in ensuring that you enjoy sailing and stay safe. Sails are a gorgeous way of getting forward. They remain the main fascination of sailboats and sea cruising. If anything, sails and boats are inseparable and are your true friends when out there on the water. As such, getting to know different types of sails and how to use them properly is of great importance.

All in all, let's wish you calm seas, fine winds, and a sturdy mast!