By Brian Hancock

Written in concise, layperson's language and whole of photos and private anecdotes, this booklet is going step by step throughout the means of developing and utilizing sails. supplied is a definitive examine the most recent advancements in sails, sailcloth, engineering, undefined, and sail trim. additionally provided are case reports that illustrate which fibres, materials, and sails are compatible for numerous varied crusing functions, from easy dinghies and day sailors to offshore racing and cruising yachts. Sailors of all degrees of curiosity and skill will locate details they could observe to their very own boats and sail offerings.

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Additional info for Maximum Sail Power: The Complete Guide to Sails, Sail Technology, and Performance

Sample text

It seems we had underestimated the poor flexibility of Kevlar yarns. When building the sail the edges of the mainsail had been tabled, or folded over and tucked under a Dacron leech tape. The sail had then been folded and bricked for shipping so that the folds were at right-angles to the tabling with the result that where they met, the fabric formed a sharp point. When we removed the leech tape later that evening, we found small inch-long tears at each fold. Luckily, we were early enough for the start that we were able to send for the spare mainsail, and with it we went on to win the regatta.

Nylon is particularly suitable for this use because it has some give, and for spinnakers strength for weight is more important than stretch resistance. Spinnakers are used when sailing downwind when the loads on the sail are greatly reduced. Nylon has a high strength-to-weight ratio and fortunately can quickly recover from being overstretched. In fact, the elasticity of nylon is good for spinnakers since these sails often collapse and refill with a high shock load being placed on the fabric, so that a little give helps keep the fabric and seams intact.

This distinctive black yarn is similar in modulus to Kevlar 29 with a slightly better flex capacity. The raw fiber is in fact gold, but fabric makers dye the yarns black to improve the fiber’s low UV tolerance. While Technora sails were popular for a while, the fiber 20 Chapter Two It Starts With a Yarn Thank Goodness for Ted Hood In the early 1980s I was fortunate enough to be part of the crew of the maxi-boat Nirvana. At the time the boat was a cutting-edge design that held true to my theory that beautiful boats also sail fast.

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