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Sail performance : techniques to maximize sail power

Author: Czesław A Marchaj
Publisher: Camden, Me. : International Marine/McGraw-Hill, 2003.
Edition/Format:   Print book : English : Rev. edView all editions and formats
Summary:
Fully updated, this authoritative and richly illustrated standard reference offers the latest information on rig design, sail construction and trim, wind-sail interaction, and the structure of the wind. From his 40 years of research and wind-tunnel tests, acknowledged expert Marchaj describes how these factors affect sail power and why certain rigs are superior in power and efficiency. Accessible and  Read more...
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Material Type: Internet resource
Document Type: Book, Internet Resource
All Authors / Contributors: Czesław A Marchaj
ISBN: 0071413103 9780071413107
OCLC Number: 51997076
Description: x, 401 pages : illustrations ; 27 cm
Contents: Part 1: Yacht Evolution, Rating Formulae and Speed Performance --
Speed and size --
Traditional Cruising Yacht Concept --
Reaction Against Fast Boats --
The Flat-out Racer Concept --
Seakindliness and Seaworthiness --
Speed Performance Factors --
How Fast is Fast --
Weather Factors --
The Drive Towards Ultimate Speed --
Part 2: Aerodynamics of Sails --
Introduction --
How and Why an Aerodynamic Force is Produced --
Early attempts to estimate aerodynamic force --
Pressure difference --
the right way to explain sail forces --
Flow visualization and other means of exemplifying the theory of foil action --
Distribution of Pressure Over Sails --
Unequal contribution of pressures to the driving force --
Which sail contributes more to the driving force: mainsail or headsail? --
The slot effect controversy --
The effect of the mast on pressure distribution --
The basic flow pattern around the sail section --
The Effects of Aerodynamic Forces --
The Measurement of Aerodynamic Forces --
Introductory interpretation of wind tunnel test results --
Aerodynamic Drag of the Sail --
Induced drag --
Friction drag --
Form drag --
Additional aerodynamic drag --
Apparent Wind Structure --
The Dependence of the Optimum Angle of Sail Incidence upon Heading Angle and Wind Strength --
Reaching conditions (wind abeam) --
Close-hauled, close-reaching Course theorem (Lanchester's principle) --
The relative importance of sails and hull in boat performance --
The effects of wind strength on sail performance in close-hauled conditions --
The Importance of Sail Camber --
Selecting the optimum camber --
The effect of the position of maximum camber --
The Importance of Sail Planform Tests on single sails --
Tests on sloops; Bermudan rigs. The Sail Power of Various Rigs --
The criteria of sail power adopted (close-hauled, reaching, running, summary of the sail criteria) The overall potential driving power of rigs tested --
How does the crab claw work? --
Factos affecting crab claw's efficiency (leading edge, camber effect, rigging, planform and the position of the sail relative to the vertical) Comparison of the crab claw's performance with that of the lateen sail--
Wind Gradient Effect and Sail --
Hull Interference --
Sail performance at different heading angles --
Effective aspect ratio --
The effect of the hull on sail forces --
The effect of aspect ratio on the performance of rectangular sails --
The effect of drying sailcloth on CL and CD (porosity) --
Wing Sails and Other Unconventional Rigs --
Sail Interaction --
Influence of the foresail on the mainsail --
Sheeting of the main and foresails --
Some Remarks About Sail Trim Lessons --
Some remarks about the cut, set and defects of sails --
Part 3 --
Steady and unsteady winds --
Significance of barometric depressions --
True wind structure --
Local winds --
Wind over a regatta course --
Microbursts --
Pumping --
a legitimate sailing technique? --
Sailing downwind (rolling) --
The Katzmayr effect.
Responsibility: C.A. Marchaj.
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Abstract:

Based upon on Marchaj's "Sailing Theory and Practice" , this volume explains the many developments in sail performance that have taken place. The author explains the factors that affect sail power  Read more...

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