What is a forestay on a sailboat?

Forestay ^{(1 or HS)} – The forestay, or headstay, connects the mast to the front (bow) of the boat and keeps your mast from falling aft. Your forestay can be full length (masthead to deck) or fractional (1/8 to 1/4 from the top of the mast to the deck).

Is Headstay same as forestay?

On a sailing vessel, a forestay, sometimes called a jibstay, or a headstay, is a piece of standing rigging. It keeps a mast from falling backwards. It is usually attached to the very top of the mast. The other end of the forestay is attached to the bow of the boat.

How is forestay length measured?

Measure the distance from the forestay attachment point on the mast to the bottom of the forestay where it intersects the deck. STL is measured with the mast up. It is the longest of any of the following: Spinnaker pole length: Rig the pole at a convenient height horizontally on the mast on the centreline of the boat.

Do all sailboats have a backstay?

In general, most modern sailboats will have a permanent backstay and some will have a permanent backstay combined with running backstays. Backstays are not always found on all vessels, especially smaller ones. A permanent backstay is attached at the top of the mast and may or may not be readily adjustable.

How tight should the forestay be?

"Optimum tension is generally considered to be about 15% of the wire's breaking strain for the cap shrouds; less for the lowers; and about 20% of breaking strain for the backstay on a masthead sloop. Fine, all you need now is a method of testing.

Replacing the forestay, what could possibly go wrong?

What is a cap shroud?

Cap Shrouds

These are the parts of a sailboat's rigging that hold the mast in place athwartship. They're attached at the masthead and via chainplates to the hull.

What does adjusting the backstay do?

Adjusting the backstay will either increase the bend of the mast (backstay tension on) or decrease bend of the mast (backstay eased). It's usual to ease backstay downwind and put on backstay tension when going upwind.

What does tightening the backstay do?

When it's tightened, cloth is pulled out of the jib luff, thereby flattening the sail. The backstay takes advantage of luff hollow and luff curve simultaneously to depower the sails, much like an airplane lowers its wing flaps for high lift and retracts them when high lift is not required.

What does backstay tension do?

On boats with rigs that bend, the backstay helps depower the mainsail. When you add backstay tension on this type of rig you are essentially compressing a straw. The mast bends forward at the middle pulling the luff away from the leech thereby flattening the sail.

What is the P measurement on a sailboat?

"P" is the luff length of the main-sail, measured along the aft face of the mast from the top of the boom to the highest point that the mainsail can be hoisted.

How are new sails measured?

Hook a long tape measure up to your jib halyard (or top furling swivel on a furler see “Furler Hoist” below) just as if it were the head ring of the sail. Hoist it all the way until it stops at the top. Measure down to whatever point you intend to attach the sails tack to. This will be your MAX.

How do you size a jib?

The jib size as expressed as a percent is found by dividing the "LP"(luff perpendicular) by the "J"(distance from the front of the mast to headstay along the deck) dimension for that particular boat. For example if the LP was 15' and the J was 10' then 15/10= 1.5.

How is forestay attached to mast?

On a sailing vessel, a forestay, sometimes just called a stay, is a piece of standing rigging which keeps a mast from falling backwards. It is attached either at the very top of the mast, or in fractional rigs between about 1/8 and 1/4 from the top of the mast.

What does forestay mean in English?

Definition of forestay

: a stay from the foremast to the foredeck or bow of a ship.

What is an inner forestay?

The inner forestay is typically attached to the mast at the upper spreader and, if not attached permanently, lives next to the mast when not in use. It is made fast to its deck fitting and can be tensioned in a variety of ways.

How does the backstay flatten the sail?

The backstay can flatten the mainsail

When the middle of the mast moves forward, the luff of the mainsail moves away from the leech, this reduces the hollow of the sail. This is like lifting the foot, it moves the clew away from the tack and flattens the bottom of the sail.

What is a hydraulic backstay?

Hydraulic backstays have a pressure-release valve (usually a knob that you turn counterclockwise to release pressure) or, in some cases, an additional quick-release button that allows you to instantly decrease backstay tension.

What are shrouds on a sailboat?

On a sailing boat, the shrouds are pieces of standing rigging which hold the mast up from side to side. There is frequently more than one shroud on each side of the boat.

How should you adjust the mast bend to depower your mainsail?

If your main is cut too full, then easing the lowers is what you might want to do to depower it a bit, but this then allows it to sag to leeward. As a general rule, the middle of the mast should sag a little to leeward in lighter air as this will develop power.

What is the difference between standing and running rigging?

Running rigging is the rigging of a sailing vessel that is used for raising, lowering, shaping and controlling the sails on a sailing vessel—as opposed to the standing rigging, which supports the mast and bowsprit. Running rigging varies between vessels that are rigged fore and aft and those that are square-rigged.

How tight should sailboat rigging be?

They should be tight enough that when you push or pull on them, they don't want to jiggle around too much. If they feel loose or floppy, you need to tighten them further.

What does mast rake do?

When you add rake to the mast, you tilt the whole sail plan aft. This, in turn, shifts the power aft, pushing more load on the stern and forcing the bow up into the wind, creating weather helm. Rake is determined by headstay length: The longer the headstay, the greater the rake.