This beautifully illustrated and well-organised book shows the reader step by step, how to trim their sails and rig for maximum performance.  Ivar Dedekam’s revolutionary approach to sail and rig tuning tackles the practical and realistic elements of tuning your boat as well as the theory of sail aerodynamics.  The book covers the many variations in boat, sail and rig design.

This beautifully illustrated and well-organised book shows the reader step by step, how to trim their sails and rig for maximum performance. Ivar Dedekam's revolutionary approach to sail and rig tuning tackles the practical and realistic elements of tuning your boat as well as the theory of sail aerodynamics. The book covers the many variations in boat, sail and rig design.

Aerodynamics.

Apparent Wind.

Points of Sailing.

Sail Shape.

Trim Devices.

Miscellaneous.

Genoa trim.

Stability.

Balance.

Mainsail trim.

The interaction of the sails.

Reaching and running.

Marking / Miscellaneous.

Trim examples.

Reefing.

Problems / Solutions.

Summary.

Trimming the Spinnaker.

Types of spinnakers.

Equipment and terms.,

Preparing the spinnaker set.

Hoisting the spinnaker.

Spinnaker pole angle.

Spinnaker pole height.

Spinnaker depth.

Running.

Reaching.

Broaching.

Steering in heavy airs.

Gybing the spinnaker.

End to end gybe.

Two-pole gybe.

Dip pole gybe.

Taking down the spinnaker.

The Gennaker.

Rig tuning.

Rig types.

Athwartship tuning.

Fore and aft tuning.

Backstay tension.

Tensioning wire and rod.

Tensioning the cap shrouds.

Pre-bending the mast.

Keel stepped masts.

Maximum mast bend.

The fractional rig.

Tuning under sail.

Straighten the mast sideways.

Adjusting the lower shrouds.

Multiple spreaders.

Tuning diagram.

Miscellaneous.

Why pre-tension?