Sail Performance: Techniques to Maximise Sail Power

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9780713664072: Sail Performance: Techniques to Maximise Sail Power

Sail Performance, based on C A Marchaj's classic Sailing Theory & Practice, has established itself as the standard work on the subject and is now acclaimed as a milestone in sailing literature. From wind tunnel tests which he has conducted, Tony Marchaj describes how the factors of wind speed, sail area, sail shape, sail setting, the hull, angle of heel, wind gradient and steadiness of the wind all affect sail power, and why certain rigs are superior in power and efficiency to others. Sail Performance is a major work which is acclaimed for its analysis of the factors that contribute to an efficient sailing rig. 'Should be on the bookshelf of every serious amateur and professional sailor' Nautical Magazine

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Sail Performance, based on C. A. Marchaj's classic Sailing Theory & Practice, has established itself as the standard work on the subject and is now acclaimed as a milestone in sailing literature.

The performance of any sailing craft largely depends on the power of the available sail--how the rig uses the wind and turns it into a useful driving force. But sail forces are determined by a multitude of factors, including wind speed, sail area, sail shape, sail setting, the hull, angle of heel, wind gradient, and steadiness of the wind.

From wind tunnel tests which he has conducted, Tony Marchaj describes how these factors affect sail power and why certain rigs are superior in power and efficiency to others. The tests also indicate where improvements in efficiency may be made, particularly when freed from the constraints imposed by the arbitrary limitations of the racing rules.

Professor Marchaj compares a number of different types of rig--Bermudan, lateen, sprit, gunter, dipping lug and Polynesian crab claw--and concludes that the Bermudan rig, which dominates the contemporary sailing scene for racing and cruising, is by no means the best available.

This major work makes a significant contribution to our understanding of the factors which contribute to an efficient sailing rig, and is a landmark in modern thinking on the subject.

"There can't be a yacht designer around who doesn't know Marchaj's Sailing Theory and Practice: this is the modern version of a classic."--Yachting World

"By a master of wind tunnel and test tank research . . . a unique publication."--Multihull International

"A classic."--Royal Naval Sailing Association

"Exceptional value . . . should be on the bookshelf of very serious amateur and professional sailor."--Nautical Magazine

"This is one of the most authoritative works around."--Yachting World

Selected Contents

Part 1: Rating Formulae and Speed Performance

  • Speed and size
  • Seakindliness and seaworthiness
  • Speed performance factors
  • How fast is fast?
  • The drive towards ultimate speed

    Part 2: Aerodynamics of Sails

  • How and why an aerodynamic force is produced
  • Distribution of pressure over sails
  • Effects and measurement of aerodynamic forces
  • Aerodynamic drag of the sail
  • Apparent wind structure
  • Sail camber and sail shape
  • Sail power of various rigs
  • The effect of wind gradient
  • Sail-hull interference
  • Wing sails
  • Sail interaction
  • Centre of effort
  • Cut, set and defects of sails

    Part 3: Steady and Unsteady Wind

  • The significance of barometric depressions
  • True wind structure
  • Local winds
  • Microbursts
  • Pumping--a legitimate technique?
  • Rolling downwind
  • Katzmary effect
  • About the Author:

    Tony Marchaj's expertise in wind tunnel and test tank research, combined with his practical sailing experience, make him uniquely qualified to write this book. Previously a research fellow in the Department of Aeronautics and Astronautics at Southampton University, he is now an independent aerodynamics consultant whose experience and advice is sought all around the world. Each of his previous books - Sailing Theory and Practice, Aero-hydrodynamics of Sailing and Seaworthiness: the Forgotten Factor - have become classic references.

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    Book Description Bloomsbury Publishing PLC, United Kingdom, 2010. Hardback. Book Condition: New. 2nd ed. Revised.. Language: English . Brand New Book. Sail Performance, based on C A Marchaj s classic Sailing Theory Practice, has established itself as the standard work on the subject and is now acclaimed as a milestone in sailing literature. From wind tunnel tests which he has conducted, Tony Marchaj describes how the factors of wind speed, sail area, sail shape, sail setting, the hull, angle of heel, wind gradient and steadiness of the wind all affect sail power, and why certain rigs are superior in power and efficiency to others. Sail Performance is a major work which is acclaimed for its analysis of the factors that contribute to an efficient sailing rig. Should be on the bookshelf of every serious amateur and professional sailor Nautical Magazine. Bookseller Inventory # AAZ9780713664072

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    Book Description Bloomsbury Publishing PLC, United Kingdom, 2010. Hardback. Book Condition: New. 2nd ed. Revised.. Language: English . Brand New Book. Sail Performance, based on C A Marchaj s classic Sailing Theory Practice, has established itself as the standard work on the subject and is now acclaimed as a milestone in sailing literature. From wind tunnel tests which he has conducted, Tony Marchaj describes how the factors of wind speed, sail area, sail shape, sail setting, the hull, angle of heel, wind gradient and steadiness of the wind all affect sail power, and why certain rigs are superior in power and efficiency to others. Sail Performance is a major work which is acclaimed for its analysis of the factors that contribute to an efficient sailing rig. Should be on the bookshelf of every serious amateur and professional sailor Nautical Magazine. Bookseller Inventory # AAZ9780713664072

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    Book Description Adlard Coles Nautical, 2002. Book Condition: New. 2002. 2nd. Hardcover. Techniques to Maximise Sail Power. 416 pages, 350+ b/w diagrams, photos. Based on C.A. Marchaj's Sailing Theory and Practice", this is a reference for sailors. From wind tunnel tests which he has conducted, Marchaj describes how wind speed, sail area, sail shape, sail setting, the hull, angle of heel, wind gradient and steadiness of wind all affect sail power.". Cateogry: (G) General (US: Trade); (P) Professional & Vocational. BIC Classification: WSSN3. Dimension: 272 x 206 x 41. Weight: 1596. . . . . . . Bookseller Inventory # V9780713664072

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    Book Description Adlard Coles Nautical. Book Condition: New. 2002. 2nd. Hardcover. Techniques to Maximise Sail Power. 416 pages, 350+ b/w diagrams, photos. Based on C.A. Marchaj's Sailing Theory and Practice", this is a reference for sailors. From wind tunnel tests which he has conducted, Marchaj describes how wind speed, sail area, sail shape, sail setting, the hull, angle of heel, wind gradient and steadiness of wind all affect sail power.". Cateogry: (G) General (US: Trade); (P) Professional & Vocational. BIC Classification: WSSN3. Dimension: 272 x 206 x 41. Weight: 1596. . . . . . Books ship from the US and Ireland. Bookseller Inventory # V9780713664072

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    Book Description Hardback. Book Condition: New. Not Signed; Sail Performance, based on C A Marchaj's classic Sailing Theory & Practice, has established itself as the standard work on the subject and is now acclaimed as a milestone in sailing literature. From wind tunnel tests which he has conducted, Tony Marchaj describes how the factors of wind speed, sail. book. Bookseller Inventory # ria9780713664072_rkm

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