السبت، 5 فبراير 2011

Yacht Riggers

Yacht Riggers
For the keen sailor in Brighton, yacht riggers in Brighton can create rigging for cruising and racing yachts. DIY standing rigging is possible to do yourself with screw on terminals such as Sta Lok or Norseman, but swaged terminals require the machine and a good operator.
Standing rigging is one job to leave to the professional yacht riggers. Best to have a professional inspect the mast and rigging, make whatever is required and refit it.
Standing rigging
Masts are held up, or made to stand up, by standing rigging - the forestay, backstay and shrouds. The mast and standing rigging together comprise what is commonly known as 'the rig'. There are two main types: masthead and fractional.
Masthead rigs have the forestay running all the way to the top of the mast together with the backstay and the outer shrouds. This arrangement provides a strong, evenly supported structure that, once set up, needs little adjustment. Compression loads on a masthead rig are high, so the mast section wilt tend to be larger.
Foresails will be large and overlap the mainsail. Their size can make them difficult to handle with large forces being exerted on sheets. The spreaders are most likely to be in-line, that is, extending from the mast at 90° to the centreline of the boat.
Fractional rigs have the forestay meeting the mast at some point below the masthead and is the standard rig for dinghies and keelboats. In recent years they have become increasingly popular on larger boats as their smaller foresails are easier to handle. However, forestay tension is less easy to achieve and as a result upwind performance can suffer.
Aft-swept spreaders are one solution to this problem and, on racing boats, running backstays. One of these run on each side of the boat, from the side of the mast at forestay height to the stern. They have to be tensioned or released as the boat tacks or gybes.
Running rigging
It used to be said that the only rope on a boat was the one in the ship's bell! All the other 'yacht ropes' have names according to the task they perform. They can be divided into three main types: halyards, sheets and control lines.
Halyards are used to hoist sails and will usually run inside the mast, emerging just above head height where they are either led onto a mast-mounted winch, or down to the deck and aft to the cockpit, probably through a rope clutch and then to a winch.
Once a halyard has been adjusted to the correct tension, you don't want it to stretch. So wire (with a rope tail for ease of handling) or increasingly a modern low-stretch rope such as Kevlar or Dyneema core will be used.
Sheets are used to control the angle of sails to the wind. When compared to the lengths of halyards, the short span of most sheets means that cheaper conventional braided polyester ropes can be used with little obvious difference in the total stretch.
Control lines provide the fine adjustment. The kicking strap/vang may comprise a multi-ratio purchase made up of a thin, low-stretch line.
The spinnaker boom uphaul and downhaul, and mainsail outhaul and reefing lines will also be found lined up, neatly labelled if you're lucky, on top of the coachroof.
Inspect ropes regularly for signs of wear, particularly where they are held in cleats or rope clutches. Pay particular attention to rope-to-wire splices on halyards.
boatpartsdatabase.com has lots of resources for the boating trade and public alike.
The web is a vast source of information. Boatpartsdatabase collects the leisure marine industry into one huge database of contacts. Yacht riggers Brighton Sussex Yachts have an advertising feature.

0 التعليقات:

إرسال تعليق

إجمالي مرات مشاهدة الصفحة

Twitter Delicious Facebook Digg Stumbleupon Favorites More

 
Powered by Blogger