First, take your headsail either laid out over a flat area, or raising the sail on the mast. Use a long tape measure and measure the (1) luff of the sail. This is the length of the front of the sail. Be sure you have the sail stretched out well to keep the measurement accurate.
How is genoa size determined?
Hoist your tape measure on your regular genoa halyard and measure to your regular tack fitting. If you want a 150% genoa, measure 1.5 x J from the tack fitting to the rail. Working from this position establish the minimum and maximum leach and foot dimensions.
How is genoa percentage calculated?
For example, if J is 10 feet, a 150% genoa will have an LP equal to 150% of 10, or 15 feet. Its area in square feet will equal 15 times its luff length divided by two.
What size is genoa?
Genoas are classified by their size; a modern number 1 genoa would typically be approximately 155%, but historically number 1 genoas have been as large as 180%. Number 2 genoas are generally in the range of 125–140%. Working jibs are also defined by the same measure, typically 100% or less of the foretriangle.
What is a 130 genoa?
A number one head sail would mean the largest genoa onboard the vessel. You might also hear a number like 130 headsail which means that the foot is 130% greater that the mast to forestay base distance. So as you learn to sail, you'll find the head sail is relatively easy to operate.
26 related questions foundIs a genoa the same as a spinnaker?
is that spinnaker is (nautical) a supplemental sail to the main sail, especially a triangular one, used on yachts for running before the wind while genoa is (nautical) a staysail that resembles a jib but extends aft beyond the mast.
What does a 150 sail mean?
The LP number, this 150, 120 percent etc., is the length of the LP dimension divided by the boats “J”. So for example if the boat's “J” is 10 feet and the LP dimension on a sail is 13 feet, the sail has an LP of 130%. Two sails, for the same boat can have the same LP yet have different clew heights.
What is the difference between a jib and a genoa?
A jib is a foresail that does not extend aft beyond the mast; a genoa, on the other hand, is larger and will overlap the mast and part of the mainsail. A jib sail is used for strong winds and is easy to handle, while the genoa is perfect for downwind sailing in light winds.
What is a #4 jib?
# 4 Jib. Reduced size Jib for use when the mainsail is reefed or nearly reefed. This sail is short of maximum luff length and has a reduced foot length to allow effective steering in large waves and reduce mainsail backwind. Heavy Weather Jib.
What is a staysail on a sailboat?
A staysail ("stays'l") is a fore-and-aft rigged sail whose luff can be affixed to a stay running forward (and most often but not always downwards) from a mast to the deck, the bowsprit, or to another mast (the mast is item 13 in the illustration right).
How do you measure the area of a sail?
The area of an actual headsail is measured by striking a perpendicular from the luff to the clew and multiplying that length by the length of the sail's luff. Under the International Offshore Rule, the base length for that perpendicular was J, expressed as LP = J.
What does jib percentage mean?
The standard foresail for a Catalina 22 is a 100 percent jib. 100 percent means that it should fill the area where the head sail goes from corner to corner to corner but, what they have done is made the standard jib much shorter at the top and a little longer at the base or foot to go past the front of the mast.
How do I calculate my headsail percentage?
The size of your headsail expressed as a percentage is simply LP divided by the J. For example, if you measured the "LP" at 11' and the "J" of your boat is 10', then: 11/10 = 1.1 or 110%. On the same boat a sail with a 15' LP would be a 150%, (15/10 = 1.5 or 150%).
How do you measure a symmetrical spinnaker?
For an accurate measurement, raise a tape measure up on the spinnaker halyard until it's at the full hoist position and measure down to the working deck – that's your 'I'. Now the luff dimension of your Symmetrical Spinnaker should be within 5% of the 'I' measurement.
How big of a sail do I need?
The ideal sailboat size to sail around the world is between 35 and 45 feet long. This length will ensure a high enough maximum hull speed, good handling in high waves, and enough cargo capacity to carry multiple weeks of food and water. Longer boats will perform as well, but are more expensive too.
How do you measure asymmetric spinnaker?
The luff length is the deciding factor when choosing the right size Asymmetrical Spinnaker. As a general rule, if you are going to fly the spinnaker just above the front pulpit, then the luff length should be about the same length that the mast height is above the deck.
Is a genoa a headsail?
Description of a Genoa
The main characteristics of a genoa are its shape and size. Genoas go past the mast, are triangular, and tend to overlap the mainsail, to some extent. It's also one of the many headsails that can be set on a Bermudian rig.
What is a Code 0 sail?
A code zero is strictly a downwind sail.
A code zero is often classified as a spinnaker in terms of racing, hence the restriction on the length of the mid-girth, but it's not a true downwind sail. If you're going downwind, you'll use either a symmetrical or asymmetrical spinnaker.
What is a #1 jib?
The sail area varies from boat to boat but is a 100% jib just passes before the mast on a tack, then a #1 headsail would be about 150% area, #2 is about 135%, #3 is 100 to 110% of jib, #4 is about 80% and #5 is small, 35% or so. As the sail gets smaller, the stitching and canvas gets tougher to handle more wind.
How do you measure a genoa sail?
First, take your headsail either laid out over a flat area, or raising the sail on the mast. Use a long tape measure and measure the (1) luff of the sail. This is the length of the front of the sail. Be sure you have the sail stretched out well to keep the measurement accurate.
What is the rope on a boat called?
The rope that runs up the mast to pull up the mainsail is called the halyard and to bring the sail down the line is called the downhaul. The lines that are used when sailing are called sheets and each sheet will refer to the sail that it controls.
Do I need a genoa?
Do you need a genoa? Large overlapping genoas are difficult to handle, hard to tack, easy to damage, and impossible to see around. A smaller jib is much easier to handle. On boats with large mainsails, a genoa is an unnecessary burden.
Is a jib a headsail?
The Headsail: This is a generic term that refers to any sail that sits forward of the mast. The most common is the Jib.
What is a code 2 sail?
Code 2 is a medium air running sail, used for apparent wind angles over 90 degrees. Code 3 is a medium air reaching sail, used for apparent wind angles near 90 degrees. Code 4 is a heavy air running sail, used in the heaviest winds normally expected.
What is a gennaker sail?
A gennaker is a sail that was developed around 1990. Used when sailing downwind, it is a cross between a genoa and a spinnaker. It is not symmetric like a true spinnaker but is asymmetric like a genoa, but the gennaker is not attached to the forestay like a jib or genoa.
